Thin Provisioning User s Manual

Transcription

1 NEC Storage Software Thin Provisioning User s Manual IS044-2E

2 NEC Corporation No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation. The contents of this book may be modified without notice in the future.

3 Preface This manual describes functions and operation methods of a NEC Storage disk array with the thin provisioning function (NEC Storage ThinProvisioning) installed. The thin provisioning function is operated mainly from the NEC Storage Manager client using a GUI (Graphical User Interface). This manual is intended for readers who already possess the professional knowledge about the NEC Storage series disk array subsystem. Refer to the manual of the NEC Storage series disk array subsystem for information on its functions. Refer to the NEC Storage Software Manual Guide (IS901) for an overview of NEC Storage and related manuals. Remarks 1. This manual explains functions implemented by the following program products: NEC Storage Manager and NEC Storage BaseProduct NEC Storage AccessControl NEC Storage ThinProvisioning 2. This manual is applicable to the program products of the following versions: NEC Storage Manager Ver6.2 NEC Storage BaseProduct Ver The NEC Storage Manager is referred to as ism or Storage Manager in this manual unless clearly specified. Also, the following terms refer to the corresponding NEC Storage software products Term NEC Storage Software Product AccessControl NEC Storage AccessControl ControlComamand NEC Storage ControlCommand DynamicDataReplication NEC Storage DynamicDataReplication RemoteDataReplication NEC Storage RemoteDataReplication ReplicationControl NEC Storage ReplicationControl ThinProvisioning NEC Storage ThinProvisioning PerformanceOptimizer NEC Storage PerformanceOptimizer ReallocationControl NEC Storage ReallocationControl PerformanceMonitor NEC Storage PerformanceMonitor 4. The following terms in this manual refer to the NEC Storage software manuals. Term NEC Storage Software Manual User s Manual NEC Storage Software NEC Storage Manager User s Manual (UNIX) (IS001) NEC Storage Software NEC Storage Manager User s Manual (IS004) Configuration Setting Tool User s Manual (GUI) NEC Storage Software Configuration Setting Tool User s Manual (GUI) (IS007)

4 Messages Handbook Term Data Replication User s Manual (Function Guide) Performance Monitoring User s Manual Performance Optimization User s Manual Snapshot User s Manual (Function Guide) LD Administrator User s Manual Data Retention User s Manual Power Saving User s Manual Partitioning User s Manual NEC Storage Software Manual NEC Storage Software Messages Handbook (IS010) NEC Storage Software Data Replication User s Manual (IS015) NEC Storage Software Performance Monitoring User s Manual (IS025) NEC Storage Software Performance Optimization User s Manual (IS026) NEC Storage Software Snapshot User s Manual (Function Guide) (IS030) NEC Storage Software LD Administrator User s Manual (IS037) NEC Storage Software Data Retention User s Manual (IS040) NEC Storage Software Power Saving User s Manual (IS042) NEC Storage Software Partitioning User s Manual (IS043) 5. Trademarks and registered trademarks UNIX is a registered trademark of The Open Group in the United States and other countries. Microsoft, Windows, Windows Server, and Windows Vista are trademarks or registered trademarks of Microsoft Corporation in the United States and other countries. Other product names and company names, etc. are trademarks or registered trademarks of the associated companies. 6. This product includes the OSSs below. For details on the licenses, refer to Appendix D in this manual. Apache log4j ( flex ( OpenSSL ( 7. In this document, the capacity is calculated based on units of 1024 (for example 1 KB = 1024 bytes) unless otherwise specified. 8. In this document, System Volume means Storage System Volume unless otherwise specified. 9. In this document, matters to which careful attention needs to be paid will be described as follows: Be sure to observe the instructions. If the indications are ignored and the system is improperly operated, settings which have been already made might be affected. Type of Indication Type Description Describes contents which users to pay special attention for operation. Describes information about restrictions on operation. 1st Edition in January nd Edition in January 2010

5 Contents Chapter 1 Overview of Thin Provisioning About Thin Provisioning Thin Provisioning Application Examples Reduced Initial Installation Cost Effective Utilization of Capacity Application Areas of Thin Provisioning...6 Chapter 2 The Thin Provisioning Function Overview of Thin Provisioning Function Virtual Capacity Pool Virtual Capacity Logical Disks Thin Provisioning Function Operations Referencing Virtual Capacity Pools and Virtual Capacity Logical Disks Binding, Changing, and Unbinding Virtual Capacity Pools and Virtual Capacity Logical Disks Monitoring Capacities of Virtual Capacity Pools and Virtual Capacity Logical Disks Deallocating the Area of Virtual Capacity Logical Disk...16 Chapter 3 Installation of Thin Provisioning Function System Configuration Related Products Software Installation...20 Chapter 4 Using the Thin Provisioning Function Initial Installation Switching from an Actual Capacity Logical Disk Events When Monitoring Capacity Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool Excess over Actual Capacity Threshold of Virtual Capacity Pool Insufficient Capacity of Virtual Capacity Pool Excess over LD Capacity Threshold of Virtual Capacity Logical Disk Excess over LD Capacity Quota of Virtual Capacity Logical Disk Insufficient Capacity of Virtual Capacity Logical Disk Restoring Data Restoring Data After Physical Fault Restoring Data After Logical Fault...72 Chapter 5 Operations of the Thin Provisioning Function Overview of Operations in ism...76 i

6 5.2 ism Main Window Activating Configuration Setting Screen Activating the Pool Binding Wizard Activating the LD Binding Wizard Activating Quick Configuration Thin Provisioning Configuration Binding Virtual Capacity Pools Binding Virtual Capacity Logical Disks Expanding a Virtual Capacity Pool Changing a Virtual Capacity Pool Threshold Changing Virtual Capacity Logical Disk Quota and Threshold Changing Responses Canceling Alarms Quick Binding of Virtual Capacity Logical Disks Area Deallocation Function Area Deallocation Command Operation Option Settings File Appendix A Notes A.1 Thin Provisioning Function Support for Each Function A.2 Thin Provisioning Function Specifications A.3 Notes on Installation and Formatting A.4 Notes on Operation A.5 Notes on Operation Using the Area Deallocation Command Appendix B License B.1 Apache log4j License B.2 Flex License B.3 OpenSSL License Index ii

7 Chapter 1 Overview of Thin Provisioning Chapter 1 Overview of Thin Provisioning 1..1 About Thiin Proviisiioniing Thin provisioning is a function that allocates disk array capacity to a volume automatically in accordance with the amount of data that is written to the volume. It was necessary to prospectively implement needed capacity in a disk array in advance and purchase disk drives in anticipation of future increases. With thin provisioning, because disk array capacity is allocated to a volume in accordance with the actual amount of data, it is not necessary to purchase disk drives in anticipation of future increases, and disk array capacity can be utilized without waste. Moreover, because a volume can be constructed without regard for disk array capacity, a large capacity volume can be prepared in advance with no effort needed for expanding volume capacity. Without thin provisioning installed Application server Disk array Volume Volume capacity Disk array capacity Actual data quantity Regardless of actual data quantity, allocate as much disk array capacity to volume as volume capacity With thin provisioning installed Application server Disk array Volume Volume capacity Disk array capacity Actual data quantity Allocate as much disk array capacity to volume as actual data quantity Figure 1-1 Overview of Thin Provisioning 1

8 Chapter 1 Overview of Thin Provisioning The following result from using thin provisioning. Capacity expansion without stopping businesses (Application server reconstruction need not accompany capacity modification) If the amount of data increases and disk array capacity is insufficient, the disk array capacity can be expanded by adding disk drives without stopping the businesses. Reduced initial installation cost Because it is possible to operate with fewer disk drives than before, the cost at the time of initial installation can be reduced. Reduced power consumption Because there are fewer disk drives implemented in a disk array, power consumption can be reduced and the amount of carbon dioxide (CO2) emitted can be decreased. Effective use of capacity Efficient use by means such as allocating free areas to volumes used in other businesses is possible. The thin provisioning function has the advantage of virtually using a large capacity with a small physical capacity. However, there is always a possibility that capacity could become insufficient because the used capacity is virtual. If capacity becomes insufficient, a file error or other failure may occur making it impossible to continue the operation. Therefore, exercise sufficient care not to run out capacity. To keep sufficient capacity, it is necessary to set a threshold before operation and always monitor the capacity to check that the actual data quantity does not exceed the physical capacity. For details on monitoring the capacity, refer to Monitoring Capacities of Virtual Capacity Pools and Virtual Capacity Logical Disks and 4.3 Events When Monitoring Capacity. 2

9 Chapter 1 Overview of Thin Provisioning 1..2 Thiin Proviisiioniing Applliicatiion Examplles Examples of the application of thin provisioning are shown below Reduced IIniittiiall IInsttallllattiion Costt Before, it was necessary to purchase disk drives (physical disks) of the capacity prospectively needed by each business in advance. Because thin provisioning allocates disk array capacity to a volume in accordance with the actual amount of data, by applying it, fewer disk drives need be purchased at the installation and the initial installation cost can be reduced. Moreover, by operating with fewer disk drives, power consumption is reduced and the amount of carbon dioxide (CO2) emitted can be decreased. Without thin provisioning installed Application server Disk array Volume Disk array capacity Volume capacity Actual data quantity PD PD PD PD PD PD Enough physical disks for volume capacity are needed PD: Physical disk With thin provisioning installed Application server Disk array Volume Disk array capacity Volume capacity Actual data quantity PD PD PD Enough physical disks for actual data quantity are needed PD: Physical disk Figure 1-2 Application Example 1 (Initial Installation) 3

10 Chapter 1 Overview of Thin Provisioning Effffecttiive Uttiilliizattiion off Capaciitty Conventionally, capacities that anticipate future increases must be allocated to volumes from the disk array capacity for each application, but if an increase in data is less than first forecast, there is wasted free area that cannot be allocated to volumes used by other applications. By applying thin provisioning, there is no wasted free area because allocation to a volume from the disk array capacity is in accordance with the amount of data written to the volume and free capacity of the disk array can be allocated to volumes used by other applications. Without thin provisioning installed With thin provisioning installed Free area of application A Disk array capacity Free area of application B Disk array capacity Free capacity Can be allocated to another application Volume used by application A Volume used by application B Volume used by application A Volume used by application B Figure 1-3 Application Example 2 (Effective Use of Capacity) If the amount of data increases and disk array capacity is insufficient, the disk array capacity can be expanded by adding physical disks without stopping applications. Add physical disks without stopping applications to expand disk array capacity (free capacity) PD PD PD Insufficient free capacity due to data quantity increase Volume used by application A Volume used by application B Disk array capacity Volume used by application A Volume used by application B Disk array capacity Figure 1-4 Application Example 3 (Capacity Expansion) When data is repeatedly added and deleted for the operations of Windows file server, some areas are allocated as the disk array s capacity by a command operation from the application server even though it is not used on 4

11 Chapter 1 Overview of Thin Provisioning OS. Such an area can be deallocated, returned to the disk array, and allocated to another volume to use the disk array s capacity more efficiently. Insufficient free capacity due to data quantity increase Release the area no longer used on OS and return it to the disk array s capacity (free area). Can be allocated to the other operation. Free area Unused Unused Release the unused area. Volume used by application A Volume used by application B Volume used by application A Volume used by application B Disk array capacity Disk array capacity Figure 1-5 Application Example 4 (Area Deallocation) 5

12 Chapter 1 Overview of Thin Provisioning 1..3 Applliicatiion Areas of Thiin Proviisiioniing Thin provisioning enables the user to reserve the minimum capacity required for initial binding and can be effectively used in applications that add or delete capacity (file) as needed (e.g. Oracle or SQL Server). This function can be also effectively used for the updating operation of frequently repeating creation and deletion of files for the operations of Windows file server. However, note that the following application cannot benefit from thin provisioning Updating operation of frequently creation and deletion files for the operations of file server other than Windows File system that distributes metadata when creating a file system (such as Linux ext3 file system) 6

13 Chapter 2 The Thin Provisioning Function Chapter 2 The Thin Provisioning Function 2..1 Overviiew of Thiin Proviisiioniing Functiion This section explains the fundamental concepts and terminology of the thin provisioning function. The thin provisioning function makes it possible to create pools and logical disks of virtual capacities. A virtual capacity is an apparent capacity in which actual capacity is not allocated and by which it is possible to allocate capacity at the time of a data write request. If the application server is Windows, the allocated capacity that is no longer needed can be returned to the pool created with the virtual capacity (deallocated). An application server recognizes a logical disk created with a virtual capacity as having the logical disk capacity that was set when it was created. Because of this, it can be used in the same way as a normal logical disk (actual capacity logical disk). Application server Logical disks created with virtual capacity (Virtual capacity logical disks) Capacity recognized by application server Allocate capacity at time of data write request Pool created with virtual capacity (Virtual capacity pool) Figure 2-1 Fundamental Concepts of Thin Provisioning Function 7

14 Chapter 2 The Thin Provisioning Function Viirttuall Capaciitty Pooll A pool that can be created with a virtual capacity that exceeds the pool s actual capacity is known as a virtual capacity pool. Virtual capacity logical disks (*1) can be bound to a virtual capacity pool. However, actual capacity logical disks cannot be bound to a virtual capacity pool. (*1) For details, refer to Virtual Capacity Logical Disks. Virtual capacity pool Pool capacity Used capacity Actual capacity Actual capacity threshold Actual capacity threshold (pre) Actual used capacity PD PD PD PD PD PD PD PD PD Figure 2-2 Overview of Virtual Capacity Pool PD: Physical disk (1) Pool capacity The capacity of a virtual capacity pool is known as the pool capacity. (2) Used capacity The total virtual capacity logical disk capacity in a pool is known as the used capacity. 8

15 Chapter 2 The Thin Provisioning Function (3) Actual capacity The capacity that has actually been reserved on physical disks allocated to a pool is known as the actual capacity. The actual capacity can be increased up to the value of the pool capacity by installing more physical disks. If the actual used capacity (see (4) below) exceeds the actual capacity, there is insufficient capacity. When this occurs, data cannot be written to a logical disk belonging to the pool. (4) Actual used capacity The total actual capacity allocated to virtual capacity logical disks from a pool is known as the actual used capacity. (5) Actual capacity threshold A threshold that is set in a virtual capacity pool as an index of the actual used capacity is known as the actual capacity threshold. An actual capacity threshold can be set within the range of the actual capacity. (6) Actual capacity threshold (pre) A threshold that is set below the actual capacity threshold for a virtual capacity pool is known as the actual capacity threshold (pre). An actual capacity threshold (pre) can be set within the range of the actual capacity threshold. 9

16 Chapter 2 The Thin Provisioning Function Viirttuall Capaciitty Logiicall Diisks A logical disk that has a virtual capacity is known as a virtual capacity logical disk. The capacity that is actually used by a virtual capacity logical disk is allocated from a virtual capacity pool. Virtual capacity logical disk Logical disk capacity LD capacity quota LD capacity threshold Actual used capacity Figure 2-3 Overview of Virtual Capacity Logical Disk (1) Logical disk capacity The capacity of a virtual capacity logical disk is known as the logical disk capacity. The logical disk capacity is the capacity that is recognized by an application server. (2) Actual used capacity The actual capacity that is allocated to a virtual capacity logical disk from a pool is known as the actual used capacity. Actual used capacity is capacity that was allocated at the time of data write requests. (3) LD capacity quota The quota that is set for a virtual capacity logical disk in order to keep from improperly allocating actual capacity is known as the LD capacity quota. A LD capacity quota can be set within the range from the actual used capacity to the logical disk capacity. Data cannot be written to a virtual capacity logical disk if the actual used capacity exceeds the LD capacity quota. 10

17 Chapter 2 The Thin Provisioning Function (4) LD capacity threshold A threshold that is set in a virtual capacity logical disk as an index of the actual used capacity is known as the LD capacity threshold. A LD capacity threshold can be set within the range of the logical disk capacity. The LD capacity threshold can be set higher than the LD capacity quota. However, the LD capacity threshold higher than the LD capacity quota does not work. Moreover, a warning dialog is displayed at the timing of setting. 11

18 Chapter 2 The Thin Provisioning Function 2..2 Thiin Proviisiioniing Functiion Operatiions This section provides an overview of functions and operations for operating the thin provisioning function after installing it Refferenciing Viirttuall Capaciitty Poolls and Viirttuall Capaciitty Logiicall Diisks The ism main window of the ism client displays various information about the virtual capacity pools and virtual capacity logical disks in a disk array. For details, refer to 5.2 ism Main Window. Various information about the virtual capacity pools and virtual capacity logical disks in a disk array can also be displayed using the ismview command or output to a file using the ismcsv command. For details on the ismview and ismcsv commands, refer to User s Manual for the OS being used Biindiing,, Changiing,, and Unbiindiing Viirttuall Capaciitty Poolls and Viirttuall Capaciitty Logiicall Diisks Binding, changing, and unbinding virtual capacity pools and virtual capacity logical disks is done by starting the Configuration Setting screen. (1) Binding a virtual capacity pool A virtual capacity pool can be bound. For details, refer to Binding Virtual Capacity Pools. (2) Changing a virtual capacity pool A virtual capacity pool can be changed. The actual capacity can be expanded. The actual capacity threshold and actual capacity threshold (pre) can be changed. For details on expanding the actual capacity, refer to Expanding a Virtual Capacity Pool. For details on changing the actual capacity threshold or actual capacity threshold (pre), refer to Changing a Virtual Capacity Pool Threshold. 12

19 Chapter 2 The Thin Provisioning Function (3) Unbinding a virtual capacity pool A virtual capacity pool can be unbound. For details on unbinding pools, refer to Configuration Setting Tool User s Manual (GUI). (4) Binding a virtual capacity logical disk A virtual capacity logical disk can be bound. For details, refer to Binding Virtual Capacity Logical Disks. (5) Changing a virtual capacity logical disk A virtual capacity logical disk can be changed. The actual capacity can be expanded. The LD capacity quota or LD capacity threshold can be changed. For details on expanding logical disks, refer to Configuration Setting Tool User s Manual (GUI). For details on changing the LD capacity quota or LD capacity threshold, refer to Changing Virtual Capacity Logical Disk Quota and Threshold. (6) Unbinding a virtual capacity logical disk A virtual capacity logical disk can be unbound. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). 13

20 Chapter 2 The Thin Provisioning Function Moniittoriing Capaciittiies off Viirttuall Capaciitty Poolls and Viirttuall Capaciitty Logiicall Diisks The capacities of virtual capacity pools and virtual capacity logical disks can be monitored. Messages are output to various logs (operation log and syslog for UNIX, operation log and event log for Windows) when an actual capacity threshold (pre), actual capacity threshold, LD capacity threshold, or LD capacity quota is exceeded or if a capacity is insufficient. For details on messages, refer to Messages Handbook. If an LD capacity quota is exceeded or a capacity is insufficient, an alarm is set for the virtual capacity pool or virtual capacity logical disk. (1) If an LD capacity quota is exceeded and the system goes into an alarm occurrence state (fault(over quota)), the alarm is canceled automatically by the following measure. The alarm is canceled automatically by reviewing the setting of the LD capacity quota and respecifying it. To cancel the alarm that indicates that the LD capacity quota has been exceeded, perform the above resetting procedure. (2) If a capacity is insufficient and the system goes into an alarm occurrence state (fault(over capacity)), the alarm is canceled automatically by the following measures. An alarm that was set for a virtual capacity pool is canceled automatically by expanding the actual capacity. An alarm that was set for a virtual capacity logical disk is canceled automatically on unbinding the virtual capacity logical disk on which writing failed or on initialization. The alarm that indicates insufficient capacity can be canceled by the logical disk or pool as described in Canceling Alarms in addition to the above procedure. The application server recognizes the virtual capacity in the virtual capacity logical disk. Although the used capacity on the application server can be checked with an OS function (Explorer or the disk property screen in Windows and df in UNIX), the used capacity as the storage cannot be checked. Use ism functions to check the used capacity, threshold or other as storage. From the application server The logical disk actual used capacity, LD capacity threshold, LD capacity quota, and other items can be checked with the configuration display command (ismcc_view)*1. From the ism client The logical disk actual used capacity, LD capacity threshold, LD capacity quota, and other items can be checked with the ism client s main window. 14

21 Chapter 2 The Thin Provisioning Function *1: To use this command, install the volume display command package from the ism installation CD (Installation is not needed if ControlCommand is implemented). In some cases, although a file is created in the volume and a file block (cluster) is reserved, file data is not actually written (for example, when creating a file with file createnew using the fsutil utility in Windows). In this case, the used capacity as storage is not consumed and the used capacity (actual used capacity) as storage may be smaller than the capacity recognized on the business volume. 15

22 Chapter 2 The Thin Provisioning Function Deallllocattiing tthe Area off Viirttuall Capaciitty Logiicall Diisk When the application server is Windows, the virtual capacity logical disk area can be deallocated to reduce the actual used capacity of virtual capacity pool with the area deallocation command operation (ismtc_deallocate) from the application server. For details about the command usage, refer to Area Deallocation Command. 16

23 Chapter 3 Installation of Thin Provisioning Function Chapter 3 Installation of Thin Provisioning Function 3..1 System Confiiguratiion An example of the configuration of hardware devices and software for using thin provisioning function is shown below. z Application Server Area deallocation command (only for Windows) Storage Manager *1 PerformanceMonitor *2 ReallocationControl *2 Switch Windows Management Terminal LAN LAN UNIX or Windows Management Server LAN or FC Disk Array *1 Included in BaseProduct as a product. *2 Recommended to install this product program. Storage Control Software *1 ThinProvisioning AccessControl *1 PerformanceOptimizer *2 Figure 3-1 System Configuration Example 17

24 Chapter 3 Installation of Thin Provisioning Function 3..2 Rellated Products Besides ThinProvisioning, the following related program products are required when using thin provisioning function. Storage control software Storage control software controls the disk arrays. Storage control software is included in BaseProduct. Storage Manager Storage Manager provides functions such as monitoring the status and setting the configuration of resources in a disk array. Storage Manager is included in BaseProduct. AccessControl AccessControl provides functions that set the logical disks that can be accessed by each application server. AccessControl is included in BaseProduct. To use the thin provisioning function more effectively, it is recommended that the following three programs be used with ThinProvisioning. PerformanceOptimizer enables to shift from an actual capacity logical disk to a virtual capacity logical disk without stopping the business. For details on shifting from an actual capacity logical disk to a virtual capacity logical disk, refer to 4.2 Switching from an Actual Capacity Logical Disk. PerformanceMonitor PerformanceMonitor provides functions to monitor and analyze the performance of disk arrays. Analyzing the transition of the actual used capacity in the virtual capacity pool and virtual capacity logical disk enables to identify the required capacity of physical disks to be installed and to expand the capacity systematically. When using PerformanceOptimizer, this program product is mandatory. PerformanceOptimizer PerformanceOptimizer provides functions to analyze the performance of disk arrays and do the tuning operation easily. This program product enables to shift from the actual capacity logical disk to the virtual capacity logical disk and to move logical disks between pools without stopping the business. Moreover, if the performance degradation occurs, the performance tuning can be done while operating the business and can improve the disk performance in the disk array. 18

25 Chapter 3 Installation of Thin Provisioning Function ReallocationControl ReallocationControl provides functions to optimize the use situation of disk resources and maintain and manage logical disks. When using PerformanceOptimizer, this program product is mandatory. Besides PerformanceOptimizer, the following program products which enable to shift from the actual capacity logical disk to the virtual capacity logical disk are also provided: DDR, RDR and ReplicationConrol. The business suspension is required, however. For details on shifting from the actual capacity logical disk to the virtual capacity logical disk, refer to 4.2 Switching from an Actual Capacity Logical Disk. DynamicDataReplication (DDR) DynamicDataReplication provides functions to realize the data replication in the same disk array. RemoteDataReplication (RDR) RemoteDataReplication provides functions to realize the data replication between different disk arrays. ControlCommand (ReplicationControl) ReplicationControl, included in ControlCommand, provides commands that perform the replication operation for the pair and check the pair status from the application server. When the OS on the application server is Windows, the storage area no longer used on OS can be deallocated with a command. To use the command, the following program product must be installed on the application server. For details of the area deallocation command, refer to Area Deallocation Command. Volume display command (ismvollist) The volume display command provides functions to create and display a logical disk and the list of related information. Installation is not needed when the ControlCommand is implemented because ismvollist is also implemented. 19

26 Chapter 3 Installation of Thin Provisioning Function 3..3 Software IInstallllatiion Storage Manager must be installed when using the thin provisioning function. For details on how to install, uninstall, and update, refer to Storage Manger Installation Guide. When installing the thin provisioning function, the licenses on ThinProvisioning and required program products must be unlocked. For details on license unlocking, refer to Configuration Setting Tool User s Manual (GUI). 20

27 Chapter 4 Using the Thin Provisioning Function Chapter 4 Using the Thin Provisioning Function 4..1 IIniitiiall IInstallllatiion The procedure for installing the thin provisioning function on initial installation of a disk array and using a virtual capacity logical disk in a new business is shown below. Application server Disk array Virtual capacity logical disk Logical disk capacity LD capacity quota LD capacity threshold (3) Allocation to application server (2) Binding virtual capacity logical disk Virtual capacity pool Pool capacity Actual capacity Actual capacity threshold Actual capacity threshold (pre) (1) Binding virtual capacity pool P P P P P P Physical disks Figure 4-1 Initial Installation Have the operations below carried out by the system administrator (L3). The licenses for ThinProvisioning and AccessControl and other related products should already be unlocked. For details on unlocking licenses, refer to Configuration Setting Tool User s Manual (GUI). 21

28 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Step 2. Binding virtual capacity pool Fig. 4-1 (1) Step 3. Binding virtual capacity logical disk Fig. 4-1 (2) Step 4. Allocation to application server Fig. 4-1 (3) Step 5. Ending configuration setting Figure 4-2 Procedure of Initial Installation Step 1. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Binding virtual capacity pool Bind a virtual capacity pool by using the LD Individual Bind/Unbind operation of configuration setting to activate the Pool Binding Wizard and specifying the following. Physical disks to bind pool Pool capacity Actual capacity threshold Actual capacity threshold (pre) For details, refer to Binding Virtual Capacity Pools. Step 3. Binding virtual capacity logical disk Bind a virtual capacity logical disk by using the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and specifying the following. Pool to bind virtual capacity logical disk Logical disk capacity LD capacity quota LD capacity threshold For details, refer to Binding Virtual Capacity Logical Disks. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the LD capacity threshold (pre) in a range not exceeding the LD capacity threshold. 22

29 Chapter 4 Using the Thin Provisioning Function Step 4. Allocation to application server Use the Setting Access Control operation of configuration setting to newly install Access Control and allocate the virtual capacity logical disk to the application server. For details on new installation and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. After the Setting Access Control operation, start up the application server and confirm that the logical disk recognized by the application server is correct. Step 5. Ending configuration setting End configuration setting and resume disk array monitoring. 23

30 Chapter 4 Using the Thin Provisioning Function 4..2 Swiitchiing from an Actuall Capaciity Logiicall Diisk The procedure for switching from an actual capacity logical disk that is used in conventional operations to a virtual capacity logical disk after installing the thin provisioning function is shown below. (1) If PerformanceOptimizer was purchased Execute LD movement from the performance optimization function to move the actual capacity logical disk to the virtual capacity logical disk. After LD movement, unbind the actual capacity logical disk that was the source LD. (2) If DDR or RDR was purchased Execute Replicate from the replication function to copy data from the actual capacity logical disk to the virtual capacity logical disk. After copying, unbind the actual capacity logical disk that was the copy source. (3) If none of PerformanceOptimizer, DDR, and RDR was purchased Copy data from the actual capacity logical disk to the virtual capacity logical disk through the application server. After copying, unbind the actual capacity logical disk that was the copy source. (1) If PerformanceOptimizer was purchased can be performed without stopping the business, but the business must be stopped for (2) If DDR or RDR was purchased and (3) If none PerformanceOptimizer, DDR and RDR was purchased. 24

31 Chapter 4 Using the Thin Provisioning Function (1) Switching from an actual capacity logical disk (with PerfomanceOptimizer purchased) The procedure for moving an actual capacity logical disk to a virtual capacity logical disk by executing LD movement from the performance optimization function is shown below. Disk array (5) Setting LD capacity quota and threshold Virtual capacity logical disk Actual capacity logical disk Application server LD capacity quota LD capacity threshold Actual used capacity (Actual data quantity) (6) Unbinding actual capacity logical disk from work disk for optimization (7) Unbinding logical disk Actual capacity logical disk After movement (4) Moving logical disk Virtual capacity logical disk Logical disk capacity (Same as actual capacity logical disk) Actual data quantity (3) Setting virtual capacity logical disk as work disk for optimization (2) Binding virtual capacity logical disk Virtual capacity Pool capacity Actual capacity Actual capacity threshold Actual capacity threshold (pre) (1) Binding virtual capacity pool P P P P P P Physical disks Figure 4-3 Switching from Actual Capacity Logical Disk (PerformanceOptimizer purchased) The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). The licenses for ThinProvisioning and AccessControl and other related products should already be unlocked. For details on unlocking licenses, refer to Configuration Setting Tool User s Manual (GUI). 25

32 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Step 2. Binding virtual capacity pool Fig. 4-3 (1) Step 3. Binding virtual capacity logical disk Fig. 4-3 (2) Step 4. Setting work disk for optimization Fig. 4-3 (3) Step 5. Ending configuration setting Step 6. Moving logical disk Fig. 4-3 (4) Step 7. Starting configuration setting Step 8. Setting LD capacity quota and threshold Fig. 4-3 (5) Step 9. Canceling work disk for optimization setting Fig. 4-3 (6) Step 10. Unbinding logical disk Fig. 4-3 (7) Step 11. Ending configuration setting Figure 4-4 Procedure to Switch from Actual Capacity Logical Disk (PerformanceOptimizer purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Binding virtual capacity pool Bind a virtual capacity pool by using the LD Individual Bind/Unbind operation of configuration setting to activate the Pool Binding Wizard and specifying the following. Physical disks to bind pool Pool capacity Actual capacity threshold Actual capacity threshold (pre) For details, refer to Binding Virtual Capacity Pools. 26

33 Chapter 4 Using the Thin Provisioning Function Step 3. Binding virtual capacity logical disk Bind the destination virtual capacity logical disk by using the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and specifying the following. Pool to bind virtual capacity logical disk Logical disk capacity For details, refer to Binding Virtual Capacity Logical Disks. Bind the virtual capacity logical disk by specifying the same format and capacity as the actual capacity logical disk that is the data source. Moreover, to set it as the work disk for optimization, do not set the LD capacity quota or threshold. Step 4. Setting work disk for optimization Use LD Administrator operations of configuration setting to change the group to which the destination virtual capacity logical disk belongs to the reserve group and then set it as the work disk for optimization. For details on changing the logical disk group and setting the work disk for optimization, refer to LD Administrator User s Manual. Step 5. Ending configuration setting End configuration setting and resume disk array monitoring. Step 6. Moving logical disk Move the actual capacity logical disk to the virtual capacity logical disk (work disk for optimization) by executing LD Movement from the performance optimization function. For details on LD movement, refer to Performance Optimization User s Manual. Step 7. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. Step 8. Setting LD capacity quota and threshold Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity logical disk and set the LD capacity quota and threshold from [Change Quota and Threshold]. For details, refer to Changing Virtual Capacity Logical Disk Quota and Threshold. 27

34 Chapter 4 Using the Thin Provisioning Function Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the LD capacity threshold in a range not exceeding the LD capacity quota. Step 9. Canceling work disk for optimization setting Use LD Administrator operations of configuration setting to select the work disk for optimization that was used for movement, cancel the work disk for optimization setting, and change the group to which the logical disk belongs to the preserve group. For details on canceling the work disk for optimization setting and changing the logical disk group, refer to LD Administrator User s Manual. Step 10. Unbinding logical disk Use the LD Individual Bind/Unbind operation of configuration setting to unbind the logical disk for which the work disk for optimization setting was canceled. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 11. Ending configuration setting End configuration setting and resume disk array monitoring. 28

35 Chapter 4 Using the Thin Provisioning Function (2) Switching from an actual capacity logical disk (with DDR or RDR purchased) The procedure for copying data from an actual capacity logical disk to a virtual capacity logical disk by executing Replicate from the replication function is shown below. When purchasing RDR, the operation for an actual capacity logical disk is done for the copy source disk array; that for a virtual capacity logical disk is done for the copy destination disk array. Application server Disk array (5) Unbinding logical disk Actual data quantity Actual capacity logical disk (4) Changing logical disk allocated to application server (3) Copying data Virtual capacity logical disk (2) Binding virtual capacity logical disk Virtual capacity pool Logical disk capacity (Same as actual capacity logical disk) LD capacity quota LD capacity threshold Actual used capacity (Actual data quantity) Pool capacity Actual capacity Actual capacity threshold Actual capacity threshold (pre) (1) Binding virtual capacity pool P P P P P P Physical disks Figure 4-5 Switching from Actual Capacity Logical Disk (DDR purchased) Business must be stopped for the operations below. When operated from the ism client, have the procedure carried out by a system administrator (L3). The licenses for ThinProvisioning and AccessControl and other related products should already be unlocked. For details on unlocking licenses, refer to Configuration Setting Tool User s Manual (GUI). 29

36 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Step 2. Binding virtual capacity pool Fig. 4-5 (1) Step 3. Binding virtual capacity logical disk Fig. 4-5 (2) Step 4. Ending configuration setting Step 5. Copying data * Stopping business Step 6. Starting configuration setting Step 7. Changing logical disk allocated to application server * Resuming business Fig. 4-5 (3) Fig. 4-5 (4) Step 8. Unbinding actual capacity logical disk Fig. 4-5 (5) Step 9. Ending configuration setting Figure 4-6 Procedure to Switch from Actual Capacity Logical Disk (DDR or RDR purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Binding virtual capacity pool Bind a virtual capacity pool by using the LD Individual Bind/Unbind operation of configuration setting to activate the Pool Binding Wizard and specifying the following. Physical disks to bind pool Pool capacity Actual capacity threshold Actual capacity threshold (pre) For details, refer to Binding Virtual Capacity Pools. Step 3. Binding virtual capacity logical disk Bind the virtual capacity logical disk that is the copy destination by using the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and specifying the following. Pool to bind virtual capacity logical disk 30

37 Chapter 4 Using the Thin Provisioning Function Logical disk capacity LD capacity quota LD capacity threshold For details, refer to Binding Virtual Capacity Logical Disks. Bind the virtual capacity logical disk by specifying the same format and capacity as the actual capacity logical disk that is the copy source. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the LD capacity threshold in a range not exceeding the LD capacity quota. Step 4. Ending configuration setting End configuration setting and resume disk array monitoring. Step 5. Copying data Pair the actual capacity logical disk as the MV with the virtual capacity logical disk as the RV from the replication function. After pair setting, execute Replicate to copy the data to the virtual capacity logical disk. After replication is complete, perform separation and unpairing. For details on pairing, unpairing, replicating, and separating, refer to Data Replication User s Manual (Function Guide). Before separating, stop business and unmount the MV (for Windows, flush and unmount) to maintain the static point. Step 6. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. 31

38 Chapter 4 Using the Thin Provisioning Function Step 7. Changing logical disk allocated to application server Using the Setting Access Control operation of configuration setting, change the logical disk that is allocated to the application server by performing the operations below. Deallocate actual capacity logical disk from LD set of application server Allocate virtual capacity logical disk to LD set of application server For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. After the Setting Access Control operation, start up the application server, confirm that the logical disk recognized by the application server is correct and that the logical disk that is recognized can be used by the business after making any necessary changes to application server settings, and resume business. Step 8. Unbinding actual capacity logical disk Unbind the actual capacity logical disk by using the LD Individual Bind/Unbind operation of configuration setting. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 9. Ending configuration setting End configuration setting and resume disk array monitoring. 32

39 Chapter 4 Using the Thin Provisioning Function (3) Switching from an actual capacity logical disk (without PerformanceOptimizer, DDR or RDR purchased) The procedure for copying data from an actual capacity logical disk to a virtual capacity logical disk through the application server is shown below. Application server (4) Copying data Disk array (6) Unbinding logical disk (5) Deallocation from application server Actual capacity logical disk (3) Allocation to application server Virtual capacity logical disk Logical disk capacity LD capacity quota LD capacity threshold Actual data quantity (2) Binding virtual capacity logical disk Virtual capacity pool Actual used capacity (Actual data quantity) Pool capacity Actual capacity Actual capacity threshold Actual capacity threahold (pre) (1) Binding virtual capacity pool P P P P P P Physical disks Figure 4-7 Switching from Actual Capacity Logical Disk (PerformanceOptimizer, DDR, and RDR not purchased) Business must be stopped for the operations below. When operated from the ism client, have the procedure carried out by a system administrator (L3). The licenses for ThinProvisioning and AccessControl and other related products should already be unlocked. For details on unlocking licenses, refer to Configuration Setting Tool User s Manual (GUI). 33

40 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Step 2. Binding virtual capacity pool Fig. 4-7 (1) Step 3. Binding virtual capacity logical disk Fig. 4-7 (2) Step 4. Allocation to application server * Stopping business Step 5. Ending configuration setting Fig. 4-7 (3) Step 6. Copying data Fig. 4-7 (4) Step 7. Starting configuration setting Step 8. Deallocation from application server * Resuming business Fig. 4-7 (5) Step 9. Unbinding actual capacity logical disk. Fig. 4-7 (6) Step 10. Ending configuration setting Figure 4-8 Procedure to Switch from Actual Capacity Logical Disk (PerformanceOptimizer, DDR, and RDR not purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Binding virtual capacity pool Bind a virtual capacity pool by using the LD Individual Bind/Unbind operation of configuration setting to activate the Pool Binding Wizard and specifying the following. Physical disks to bind pool Pool capacity Actual capacity threshold Actual capacity threshold (pre) For details, refer to Binding Virtual Capacity Pools. Step 3. Binding virtual capacity logical disk Bind the virtual capacity logical disk that is the copy destination by using the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and specifying the following. 34

41 Chapter 4 Using the Thin Provisioning Function Pool to bind virtual capacity logical disk Logical disk capacity LD capacity quota LD capacity threshold For details, refer to Binding Virtual Capacity Logical Disks. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the LD capacity threshold in a range not exceeding the LD capacity quota. Step 4. Allocation to application server Use the Setting Access Control operation of configuration setting to allocate the virtual capacity logical disk to the LD set of the application server. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop business to maintain the static point of the logical disk that is the copy source. After the Setting Access Control operation, restart the application server and confirm that the logical disk recognized by the application server is correct. Step 5. Ending configuration setting End configuration setting and resume disk array monitoring. Step 6. Copying data Use application server commands to copy data from the actual capacity logical disk to the virtual capacity logical disk. A tool that copies an entire disk must be used when copying. Step 7. Starting configuration setting Start configuration setting by selecting the disk array for which to install the thin provisioning function in the main window of ism client (Web GUI) and activating Configuration Setting. 35

42 Chapter 4 Using the Thin Provisioning Function Step 8. Deallocation from application server Use the Setting Access Control operation of configuration setting to cancel the allocation of the actual capacity logical disk to the LD set of the application server. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. After the Setting Access Control operation, start up the application server, confirm that the logical disk recognized by the application server is correct and that the logical disk that is recognized can be used by the business after making any necessary changes to application server settings, and resume business. Step 9. Unbinding actual capacity logical disk Unbind the actual capacity logical disk by using the LD Individual Bind/Unbind operation of configuration setting. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 10. Ending configuration setting End configuration setting and resume disk array monitoring. 36

43 Chapter 4 Using the Thin Provisioning Function 4..3 Events When Moniitoriing Capaciity An example of operating after installing the thin provisioning function and events that occur when monitoring capacity are explained below. Application server Disk array Virtual capacity logical disk Management server Storage Manager Accumulating and analyzing actual used capacity Periodically monitor capacity allocated to virtual capacity pool and virtual capacity logical disk * Output messages to logs if threshold excess, quota excess, or insufficient capacity occurs * PerformanceMonitor must be purchased Virtual capacity pool LD capacity quota LD capacity threshold Actual used capacity Allocate actual capacity in accordance with writing from application server Actual capacity Actual capacity threshold Actual capacity threshold (pre) Collection and analysis of allocation history History file Expand actual capacity by installing P additional physical disks as needed Physical disk Start of operation *PerformanceMonitor must be purchased Periodically monitor capacity allocated to virtual capacity pool and virtual capacity logical disk Collection of allocation history for virtual capacity pool and virtual capacity logical disk No problems Threshold excess, Quota excess, or Insufficient capacity occurs Analysis of allocation history There may be insufficient space for actual capacity in future No problems Determine what capacity should be added Expand actual capacity by installing more physical disks as needed Figure 4-9 Example of Operating after Thin Provisioning Function Installation The capacity allocated to the virtual capacity pool and virtual capacity logical disk is monitored regularly during operation, and messages are output to various logs (operations log and syslog for UNIX, operations log 37

44 Chapter 4 Using the Thin Provisioning Function and event log for Windows) if it exceeds the actual capacity threshold (pre), actual capacity threshold, LD capacity threshold, or LD capacity quota, or if there is insufficient capacity. For details on messages, refer to Messages Handbook. Events that occur and how to cope with them are explained below. Events related to virtual capacity pool Actual capacity threshold (pre) of virtual capacity pool exceeded For countermeasures, refer to Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool. Actual capacity threshold of virtual capacity pool exceeded For countermeasures, refer to Excess over Actual Capacity Threshold of Virtual Capacity Pool. Insufficient capacity of virtual capacity pool For countermeasures, refer to Insufficient Capacity of Virtual Capacity Pool. Events related to virtual capacity logical disk LD capacity threshold of virtual capacity logical disk exceeded For countermeasures, refer to Excess over LD Capacity Threshold of Virtual Capacity Logical Disk. LD capacity quota of virtual capacity logical disk exceeded For countermeasures, refer to Excess over LD Capacity Quota of Virtual Capacity Logical Disk. Insufficient capacity of virtual capacity logical disk For countermeasures, refer to Insufficient Capacity of Virtual Capacity Logical Disk. Data on the application server can be lost by a write from the application server to a logical disk failing when the LD capacity quota of the virtual capacity logical disk is exceeded or the capacity of the virtual capacity pool or virtual capacity logical disk is insufficient. Keep this from happening by taking appropriate measures before the LD capacity quota is exceeded or the capacity becomes insufficient. The transition of capacity at event occurrence can be checked with the performance analysis function when an event occurs during capacity monitoring. For details about the performance analysis function, refer to Performance Analysis User s Manual. 38

45 Chapter 4 Using the Thin Provisioning Function Excess over Acttuall Capaciitty Thresholld ((pre)) off Viirttuall Capaciitty Pooll Countermeasures for when the actual used capacity of the virtual capacity pool exceeds the actual capacity threshold (pre) are shown below. (1) If much of the actual capacity of the virtual capacity pool is free Change the actual capacity threshold (pre) of the virtual capacity pool. (2) If little of the actual capacity of the virtual capacity pool is free Expand the actual capacity of the virtual capacity pool. (3) If expanding actual capacity of the virtual capacity pool exceeded PD group parameters Move virtual capacity logical disks. (1) Changing actual capacity threshold (pre) of virtual capacity pool The procedure for changing the actual capacity threshold (pre) when much of the actual capacity of the virtual capacity pool is free is shown below. Actual capacity threshold (pre) exceeded Virtual capacity pool Pool capacity Actual capacity Actual used capacity Actual capacity threshold (pre) Change threshold (pre) Virtual capacity pool Figure 4-10 Changing Actual Capacity Threshold (Pre) of Virtual Capacity Pool The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Starting configuration setting Step 2. Changing actual capacity threshold (pre) of virtual capacity pool Step 3. Ending configuration setting Figure 4-11 Procedure to Change Actual Capacity Threshold (Pre) of Virtual Capacity Pool 39

46 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Changing actual capacity threshold (pre) of virtual capacity pool Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity pool to which the operation applies and change the setting of the threshold (pre) from [Change Actual Cap. Threshold]. For details, refer to Changing a Virtual Capacity Pool Threshold. Specify the actual capacity threshold (pre) in a range not exceeding the actual capacity threshold. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. 40

47 Chapter 4 Using the Thin Provisioning Function (2) Expanding actual capacity of virtual capacity pool The procedure for adding a physical disk to expand the actual capacity when little of the actual capacity of the virtual capacity pool is free is shown below. Actual capacity threshold (pre) exceeded Virtual capacity pool Pool capacity Actual capacity Actual used capacity Actual capacity threshold (pre) Expand actual capacity Virtual capacity pool PD Add physical disk Figure 4-12 Expanding Actual Capacity of Virtual Capacity Pool The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). The procedure assumes that the physical disk is added by maintenance personnel to the same PD pool as the virtual capacity pool to which the operations apply. Step 1. Checking disk array configuration Step 2. Starting configuration setting Step 3. Expanding actual capacity of virtual capacity pool Step 4. Ending configuration setting Figure 4-13 Procedure to Expand Actual Capacity of Virtual Capacity Pool Step 1. Checking disk array configuration From the main window of ism client (Web GUI), check the properties of the target disk array and confirm that [Total Capacity] and [Number of Elements] of physical disks are increasing. For details of disk array information display, refer to User s Manual for the OS being used. Step 2. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. 41

48 Chapter 4 Using the Thin Provisioning Function Step 3. Expanding actual capacity of virtual capacity pool Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity pool to which the operation applies and add a physical disk from [Capacity Expansion]. Also perform pool capacity expansion as necessary. Expanding the actual capacity of the virtual capacity pool also automatically changes the capacities of the actual capacity threshold (pre) and actual capacity threshold. For details, refer to Expanding a Virtual Capacity Pool. If the actual capacity threshold (pre) and actual capacity threshold ratios (%) were changed as a temporary measure, return them to their original values before expanding the actual capacity of the virtual capacity pool. Step 4. Ending configuration setting End configuration setting and resume disk array monitoring. 42

49 Chapter 4 Using the Thin Provisioning Function (3) Moving virtual capacity logical disks The procedure for securing free areas of actual capacity by moving some virtual capacity logical disks to a virtual capacity pool of another PD group when PD group parameters are exceeded on expanding the actual capacity of a virtual capacity pool is shown below. Actual capacity threshold (pre) exceeded Virtual capacity pool Pool Capacity Actual capacity Actual used capacity Actual capacity threshold (pre) Move some virtual capacity logical disks to another pool Move LD LD LD LD LD LD Virtual capacity pool Virtual capacity pool of another PD group Figure 4-14 Moving Virtual Capacity Logical Disks (a) If PerformanceOptimizer was purchased Execute LD movement from the performance optimization function to move some virtual capacity logical disks to a virtual capacity pool of another PD group. After moving, unbind the virtual capacity logical disks that were the source. (b) If DDR was purchased Execute Replicate from the replication function to copy the data of some virtual capacity logical disks to virtual capacity logical disks of another PD group. After copying, unbind the virtual capacity logical disks that were the source. (c) If neither PerformanceOptimizer nor DDR was purchased Copy the data of some virtual capacity logical disks to virtual capacity logical disks of another PD group through the application server. After copying, unbind the virtual capacity logical disks that were the source. After moving some virtual capacity logical disks to another pool, confirm that enough free capacity has been secured in the actual capacity of the virtual capacity pool that was the source for operation to continue. 43

50 Chapter 4 Using the Thin Provisioning Function (a) Moving virtual capacity logical disks (with PerformanceOptimizer purchased) The procedure for moving some virtual capacity logical disks to a virtual capacity pool of another PD group by executing LD movement from the performance optimization function is shown below. The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). The procedure assumes that a virtual capacity pool has been bound to another PD group. Step 1. Starting configuration setting Step 2. Binding destination virtual capacity logical disks Step 3. Setting work disks for optimization Step 4. Ending configuration setting Step 5. Moving logical disks Step 6. Starting configuration setting Step 7. Canceling setting of work disks for optimization Step 8. Unbinding virtual capacity logical disks. Step 9. Ending configuration setting Figure 4-15 Procedure to Move Virtual Capacity Logical Disks (PerformanceOptimizer purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. 44

51 Chapter 4 Using the Thin Provisioning Function Step 2. Binding destination virtual capacity logical disks Use the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and bind the destination virtual capacity logical disks. For details, refer to Binding Virtual Capacity Logical Disks. Bind the virtual capacity logical disks by specifying the same format and capacity as the virtual capacity logical disks that are the data source. Moreover, LD capacity quotas or thresholds can be carried over at the timing of LD movement. In that case, do not set them to work disks for optimization. Step 3. Setting work disks for optimization Use LD Administrator operations of configuration setting to change the group to which the destination virtual capacity logical disks belong to the reserve group and then set them as work disks for optimization. For details on changing the logical disk group and setting work disks for optimization, refer to LD Administrator User s Manual. Step 4. Ending configuration setting End configuration setting and resume disk array monitoring. Step 5. Moving logical disks Execute LD movement from the performance optimization function to move some of the virtual capacity logical disks belonging to the virtual capacity pool in which the event occurred to virtual capacity logical disks (work disks for optimization) bound to another PD group. The LD capacity quotas and thresholds that were set for the source virtual capacity logical disks can be carried over into the destination virtual capacity logical disk. For details on LD movement, refer to Performance Optimization User s Manual. Step 6. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. Step 7. Canceling setting of work disks for optimization Use LD Administrator operations of configuration setting to select the work disks for optimization that were used in moving, cancel the work disk for optimization settings, and change the group to which the destination virtual capacity logical disks belong to the preserve group. For details on canceling work disk for optimization settings and changing the logical disk group, refer to LD Administrator User s Manual. 45

52 Chapter 4 Using the Thin Provisioning Function Step 8. Unbinding virtual capacity logical disks Use the LD Individual Bind/Unbind operation of configuration setting to unbind the virtual capacity logical disks for which the work disk for optimization settings were canceled. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 9. Ending configuration setting End configuration setting and resume disk array monitoring. 46

53 Chapter 4 Using the Thin Provisioning Function (b) Moving virtual capacity logical disks (With DDR purchased) The procedure for copying some data of the virtual capacity logical disk to a virtual capacity logical disk of another PD group by executing Replicate from the replication function is shown below. The operations below require the stopping of business. When operated from the ism client, have the procedure carried out by a system administrator (L3). The procedure assumes that a virtual capacity pool has been bound to another PD group. Step 1. Starting configuration setting Step 2. Binding virtual capacity logical disks (copy destination) Step 3. Ending configuration setting Step 4. Copying data * Stopping business Step 5. Starting configuration setting Step 6. Changing logical disks allocated to application server * Resuming business Step 7. Unbinding virtual capacity logical disks (copy source) Step 8. Ending configuration setting Figure 4-16 Procedure to Move Virtual Capacity Logical Disks (DDR purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. 47

54 Chapter 4 Using the Thin Provisioning Function Step 2. Binding virtual capacity logical disks (copy destination) Use the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and bind the destination virtual capacity logical disks. For details, refer to Binding Virtual Capacity Logical Disks. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the actual capacity threshold in a range not exceeding the actual capacity quota. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. Step 4. Copying data From the replication function, pair some of the virtual capacity logical disks belonging to the virtual capacity pool in which the event occurred as MV with virtual capacity logical disks bound to another PD group as RV. After pairing, execute Replicate to copy data to the virtual capacity logical disks of the other PD group. After replication is complete, perform separation and unpairing. For details on pairing, unpairing, replicating, and separating, refer to Data Replication User s Manual (Function Guide). Before separating, stop business and unmount the MV (for Windows, flush and unmount) to maintain the static point. 48

55 Chapter 4 Using the Thin Provisioning Function Step 5. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. Step 6. Changing logical disks allocated to application server Using the Setting Access Control operation of configuration setting, change the logical disks that are allocated to the application server by performing the operations below. Deallocate source virtual capacity logical disks from LD set of application server Allocate destination virtual capacity logical disks to LD set of application server For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. After the Setting Access Control operation, start up the application server, confirm that the logical disks recognized by the application server are correct and that the logical disks that are recognized can be used by the business after making any necessary changes to application server settings, and resume business. Step 7. Unbinding virtual capacity logical disks (copy source) Use the LD Individual Bind/Unbind operation of configuration setting to unbind the virtual capacity logical disks that were the copy source. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 8. Ending configuration setting End configuration setting and resume disk array monitoring. 49

56 Chapter 4 Using the Thin Provisioning Function (c) Moving virtual capacity logical disks (without PerformanceOptimizer or DDR purchased) The procedure for copying data of some virtual capacity logical disks to virtual capacity logical disks of another PD group through the application server is shown below. The operations below require the stopping of business. When operated from the ism client, have the procedure carried out by a system administrator (L3). The procedure assumes that a virtual capacity pool has been bound to another PD group. Step 1. Starting configuration setting Step 2. Binding virtual capacity logical disks (copy destination) Step 3. Allocation to application server (copy destination) * Stopping business Step 4. Ending configuration setting Step 5. Copying data Step 6. Starting configuration setting Step 7. Deallocation from application server (copy source) * Resuming business Step 8. Unbinding virtual capacity logical disks (copy source) Step 9. Ending configuration setting Figure 4-17 Procedure to Move Virtual Capacity Logical Disks (PerformanceOptimizer and DDR not purchased) Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. 50

57 Chapter 4 Using the Thin Provisioning Function Step 2. Binding virtual capacity logical disks (copy destination) Use the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and bind the destination virtual capacity logical disks. For details, refer to Binding Virtual Capacity Logical Disks. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Specify the actual capacity threshold in a range not exceeding the actual capacity quota. Step 3. Allocation to application server (copy destination) Use the Setting Access Control operation of configuration setting to allocate the destination virtual capacity logical disks to the LD set of the application server. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop business to maintain the static points of the logical disks that are the copy source. After the Setting Access Control operation, restart the application server and confirm that the logical disks recognized by the application server are correct. Step 4. Ending configuration setting End configuration setting and resume disk array monitoring. Step 5. Copying data Use application server commands to copy data from some virtual capacity logical disks to virtual capacity logical disks bound to another PD group. A tool that copies an entire disk must be used when copying. Step 6. Starting configuration setting Start configuration setting by selecting the disk array to which the operations apply in the main window of ism client (Web GUI) and activating Configuration Setting. 51

58 Chapter 4 Using the Thin Provisioning Function Step 7. Deallocation from application server (copy source) Use the Setting Access Control operation of configuration setting to cancel the allocation of the source virtual capacity logical disks to the LD set of the application server. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. After the Setting Access Control operation, start up the application server, confirm that the logical disks recognized by the application server are correct and that the logical disks that are recognized can be used by the business after making any necessary changes to application server settings, and resume business. Step 8. Unbinding virtual capacity logical disks (copy source) Use the LD Individual Bind/Unbind operation of configuration setting to unbind the virtual capacity logical disks that were the copy source. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 9. Ending configuration setting End configuration setting and resume disk array monitoring. 52

59 Chapter 4 Using the Thin Provisioning Function Excess over Acttuall Capaciitty Thresholld off Viirttuall Capaciitty Pooll Countermeasures for when the actual used capacity of the virtual capacity pool exceeds the actual capacity threshold are shown below. (1) If much of the actual capacity of the virtual capacity pool is free Change the actual capacity threshold of the virtual capacity pool. (2) If little of the actual capacity of the virtual capacity pool is free Expand the actual capacity of the virtual capacity pool. (3) If expanding actual capacity of the virtual capacity pool exceeded PD group parameters Move virtual capacity logical disks. (1) Changing actual capacity threshold of virtual capacity pool When much of the actual capacity of the virtual capacity pool is free, change the actual capacity threshold. Actual capacity threshold exceeded Pool capacity Actual capacity Actual used capacity Actual capacity threshold Change threshold Virtual capacity pool Virtual capacity pool Figure 4-18 Changing Actual Capacity Threshold of Virtual Capacity Pool The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Starting configuration setting Step 2. Changing actual capacity threshold of virtual capacity pool Step 3. Ending configuration setting Figure 4-19 Procedure to Change Actual Capacity Threshold of Virtual Capacity Pool Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. 53

60 Chapter 4 Using the Thin Provisioning Function Step 2. Changing actual capacity threshold of virtual capacity pool Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity pool to which the operation applies and change the setting of the threshold from [Change Actual Cap. Threshold]. For details, refer to Changing a Virtual Capacity Pool Threshold. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. (2) Expanding actual capacity of virtual capacity pool When little of the actual capacity of the virtual capacity pool is free, add a physical disk to expand the actual capacity. Pool capacity Actual capacity threshold exceeded Actual capacity Actual used capacity Actual capacity threshold Expand actual capacity Virtual capacity pool Virtual capacity pool PD Add physical disk Figure 4-20 Expanding Actual Capacity of Virtual Capacity Pool For the procedure, refer to (2) Expanding actual capacity of virtual capacity pool of Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool. (3) Moving virtual capacity logical disks When PD group parameters are exceeded on expanding the actual capacity of a virtual capacity pool, secure free areas of actual capacity by moving some virtual capacity logical disks to a virtual capacity pool of another PD group. Actual capacity threshold exceeded Virtual capacity pool Pool capacity Actual capacity Actual used capacity Actual capacity threshold Move some virtual capacity logical disks to another pool Move LD LD LD LD LD LD Virtual capacity pool Virtual capacity pool of another PD group Figure 4-21 Moving Virtual Capacity Logical Disks For the procedure, refer to (3) Moving virtual capacity logical disks of Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool. 54

61 Chapter 4 Using the Thin Provisioning Function IInsuffffiiciientt Capaciitty off Viirttuall Capaciitty Pooll Countermeasures for when the actual used capacity of the virtual capacity pool exceeds the actual capacity are shown below. When the capacity of a virtual capacity pool becomes insufficient, some virtual capacity logical disks belonging to that virtual capacity pool are also insufficient (writing to those virtual capacity logical disks failed) at the same time. Therefore, both the virtual capacity pool and virtual capacity logical disks must be recovered. Step 1. Stopping all businesses Step 2. Restoring virtual capacity pool Step 3. Resuming (some) businesses Step 4. Restoring virtual capacity logical disks Step 5. Resuming all businesses Figure 4-22 Restoration Procedure for Insufficient Capacity Step 1. Stopping all businesses Stop all business that uses the virtual capacity logical disks belonging to the virtual capacity pool of which capacity is insufficient. Step 2. Restoring virtual capacity pool Restore the virtual capacity pool of which capacity is insufficient. If the actual capacity of a virtual capacity pool does not exceed that of the PD group, refer to (1) Expanding actual capacity of virtual capacity pool. If exceeded, refer to (2) Moving virtual capacity logical disks. 55

62 Chapter 4 Using the Thin Provisioning Function (1) Expanding actual capacity of virtual capacity pool Expand the actual capacity of a virtual capacity pool by adding physical disks. Insufficient capacity Virtual capacity pool Pool capacity Actual capacity Actual used capacity Expand actual capacity Virtual capacity pool PD Actual capacity Actual used capacity Add physical disk Figure 4-23 Expanding Actual Capacity of Virtual Capacity Pool For the procedure, refer to (2) Expanding actual capacity of virtual capacity pool of Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool. Expanding the actual capacity of a virtual capacity pool automatically cancels alarms of the virtual capacity pool that occurred due to insufficient capacity. (2) Moving virtual capacity logical disks If expanding the actual capacity of a virtual capacity pool exceeds PD group parameters, move some of the virtual capacity logical disks to a virtual capacity pool of another PD group. Insufficient capacity Virtual capacity pool Pool capacity Actual capacity Actual used capacity Move some virtual capacity logical disks to another pool Move LD LD LD LD LD LD Actual capacity Actual used capacity Virtual capacity pool Virual capacity pool of another PD group Figure 4-24 Moving Virtual Capacity Logical Disks For the procedure, refer to (3) Moving virtual capacity logical disks of Excess over Actual Capacity Threshold (pre) of Virtual Capacity Pool. After moving virtual capacity logical disks, use the procedure below to cancel virtual capacity pool alarms that occurred due to insufficient capacity. When operated from the ism client, have the procedure carried out by a system administrator (L3). 56

63 Chapter 4 Using the Thin Provisioning Function Step 2-1. Starting configuration setting Step 2-2. Canceling virtual capacity pool alarms Step 2-3. Ending configuration setting Figure 4-25 Procedure to Cancel Virtual Capacity Pool Alarms Step 2-1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2-2. Canceling virtual capacity pool alarms Use the Setting Disk Array operation of configuration setting to cancel alarms of the virtual capacity pool in which there was insufficient capacity. For details, refer to Changing Responses. Step 2-3. Ending configuration setting End configuration setting and resume disk array monitoring. Step 3. Resuming business (some) Resume business that uses a virtual capacity logical disk in which there is no insufficient capacity. Step 4. Repairing virtual capacity logical disks Repair virtual capacity logical disks that have insufficient capacity * For the procedure, refer to Insufficient Capacity of Virtual Capacity Logical Disk. Step 5. Resuming business Resume all business. 57

64 Chapter 4 Using the Thin Provisioning Function Excess over LD Capaciitty Thresholld off Viirttuall Capaciitty Logiicall Diisk Countermeasures for when the actual used capacity of a virtual capacity logical disk exceeds the LD capacity threshold are shown below. (1) If much of the capacity of the virtual capacity logical disk is free Change the LD capacity threshold of the virtual capacity logical disk. (2) If little of the capacity of the virtual capacity logical disk is free Expand the virtual capacity logical disk. (1) Changing LD capacity threshold of virtual capacity logical disk The procedure for changing the LD capacity threshold when much of the capacity of the virtual capacity logical disk is free is shown below. LD capacity threshold exceeded Logical disk capacity Actual used capacity LD capacity threshold Change threshold Virtual capacity logical disk Virtual capacity logical disk Figure 4-26 Changing LD Capacity Threshold of Virtual Capacity Logical Disk The operations below can be performed while business operations continue and business does not stop. When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Starting configuration setting Step 2. Changing LD capacity threshold of virtual capacity logical disk. Step 3. Ending configuration setting Figure 4-27 Procedure to Change LD Capacity Threshold of Virtual Capacity Logical Disk Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. 58

65 Chapter 4 Using the Thin Provisioning Function Step 2. Changing LD capacity threshold of virtual capacity logical disk Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity logical disk to which the operation applies and change the setting of the threshold from [Change quota or threshold]. For details, refer to Changing Virtual Capacity Logical Disk Quota and Threshold. Specify the LD capacity threshold in a range not exceeding the LD capacity quota. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. 59

66 Chapter 4 Using the Thin Provisioning Function (2) Expanding virtual capacity logical disk The procedure for expanding the logical disk capacity when little of the virtual capacity logical disk is free is shown below. LD capacity threshold exceeded Logical disk capacity Actual used capacity LD capacity threshold Expand capacity Virtual capacity logical disk Virtual capacity logical disk Figure 4-28 Expanding Virtual Capacity Logical Disk Since little of the logical disk capacity that was set at the time of binding in anticipation of future increments is free, before expanding the capacity, confirm that there is no increase in data quantity that was not anticipated by the business, and if there is a problem, perform a review of the business. If little still is free after review, perform a review of the prospective additional data quantity and expand the capacity. How areas expanded by capacity expansion are made to be recognized on the application server varies by platform. Since the platforms that can be used effectively by the logical disk capacity expansion function are limited, check with the system administrator or maintenance personnel. Moreover, it is recommended that a backup of the data in the logical disk be taken for safety s sake before carrying out logical disk capacity expansion operations. When operated from the ism client, have these carried out by a system administrator (L3). Step 1. Starting configuration setting Step 2. Expanding logical disk capacity Step 3. Ending configuration setting Figure 4-29 Procedure to Expand Virtual Capacity Logical Disk 60

67 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Expanding logical disk capacity Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity logical disk to which the operation applies and expand the logical disk capacity from [Capacity Expansion]. Even if the capacity of the virtual capacity logical disk is expanded, the set values (specified by percentage (%)) of the LD capacity threshold and LD capacity quota are retained. For details on expanding logical disk capacity, refer to Configuration Setting Tool User s Manual (GUI). If the LD capacity threshold and LD capacity quota ratios (%) were changed as a temporary measure, return them to their original values before expanding the capacity of the virtual capacity logical disk. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. 61

68 Chapter 4 Using the Thin Provisioning Function Excess over LD Capaciitty Quotta off Viirttuall Capaciitty Logiicall Diisk Countermeasures for when the actual used capacity of a virtual capacity logical disk exceeds the LD capacity quota and writing to the virtual capacity logical disk fails are shown below. If the virtual capacity logical disk is recognized by a Windows OS, the countermeasure is different depending on how the logical disk response to insufficient capacity is changed. (1) If much of the capacity of the virtual capacity logical disk is free Change the LD capacity quota of the virtual capacity logical disk. (2) If little of the capacity of the virtual capacity logical disk is free Expand the virtual capacity logical disk. (1) Changing LD capacity quota of virtual capacity logical disk Change the LD capacity threshold if much of the capacity of the virtual capacity logical disk is free. LD capacity quota exceeded Logical disk capacity Actual used capacity LD capacity quota Change quota Virtual capacity logical disk Virtual capacity logical disk Figure 4-30 Changing LD Capacity Quota of Virtual Capacity Logical Disk When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Starting configuration setting * Stopping business Step 2. Changing LD capacity quota of virtual capacity logical disk Step 3. Ending configuration setting Step 4. Repairing data * Resuming business Figure 4-31 Procedure to Change LD Capacity Quota of Virtual Capacity Logical Disk 62

69 Chapter 4 Using the Thin Provisioning Function Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. Before starting configuration setting, stop business that uses the virtual capacity logical disk to which the operation applies. Step 2. Changing LD capacity quota of virtual capacity logical disk Use the LD Individual Bind/Unbind operation of configuration setting to select the virtual capacity logical disk to which the operation applies and change the setting of the quota from [Change quota or threshold]. For details, refer to Changing Virtual Capacity Logical Disk Quota and Threshold. Since writing to a virtual capacity logical disk fails if the actual used capacity of the virtual capacity logical disk exceeds the LD capacity quota, specify a suitable value in the LD capacity quota. Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. Step 4. Repairing data Restore backed up data or otherwise restore data to a stage at which its integrity is ensured. If the logical disk that runs on a Windows OS is set to Make an LD inaccessible when the capacity becomes insufficient, the volume exceeding the quota becomes invisible to the OS (The volume becomes inaccessible even though it seems to exist on OS). In such a case, make the OS recognize the volume again with the procedures below. 63

70 Chapter 4 Using the Thin Provisioning Function Step 4-1. Stopping processes that could access the volume (Explorer or command prompt) Step 4-2. Rescanning the disk with Disk Management Step 4-3. Checking volume information with Disk Management Step 4. Rebuilding data * Resuming operation Step 4-1. Stopping processes that could access the volume Disk rescanning may be interrupted if Explorer or command prompt is accessing the relevant volume. So, close the windows of such processes. Step 4-2. Rescanning the disk Open Disk Management and rescan the disk. Step 4-3. Checking volume information After completing rescanning the disk, check that the relevant volume is correctly recognized again referring to the volume list. Also, check that the drive letter remains the same. If the volume is not correctly recognized again, restart the server. Even if Make an LD inaccessible is specified as the logical disk response when the capacity becomes insufficient, volume may seem to be accessible due to some OS s cache control. Even in this case, access is not possible if the Delay writing failed message appears. Rebuild the volume with the above procedures. Resume business after confirming that the virtual capacity logical disk in which data was restored can be used by the business. 64

71 Chapter 4 Using the Thin Provisioning Function (2) Expanding virtual capacity logical disk Expand the logical disk capacity if little of the capacity of the virtual capacity logical disk is free. LD capacity quota exceeded Logical disk capacity Actual used capacity LD capacity quota Expand capacity Virtual capacity logical disk Virtual capacity logical disk Figure 4-32 Expanding Virtual Capacity Logical Disk For the procedure, refer to (2) Expanding virtual capacity logical disk of Excess over LD Capacity Threshold of Virtual Capacity Logical Disk. Before expanding capacity, stop business that uses the virtual capacity logical disk to which the operation applies. After expanding capacity, restore backed up data or otherwise restore data to a stage at which its integrity is ensured. Resume business again after confirming that the virtual capacity logical disk in which data was restored can be used by the business. 65

72 Chapter 4 Using the Thin Provisioning Function IInsuffffiiciientt Capaciitty off Viirttuall Capaciitty Logiicall Diisk Countermeasures for when the actual used capacity of the virtual capacity pool to which a virtual capacity logical disk belongs exceeds the actual capacity and writing to the virtual capacity logical disk fails are shown below. If a virtual capacity logical disk has insufficient capacity, there is insufficient capacity simultaneously at the virtual capacity pool to which that disk belongs. Before restoring a virtual capacity logical disk, first restore the virtual capacity pool. Refer to Insufficient Capacity of Virtual Capacity Pool for the procedure to restore a virtual capacity pool. Following virtual capacity pool restoration, use the procedure below to make the virtual capacity logical disk ready. When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Starting configuration setting Step 2. Canceling virtual capacity logical disk alarm Step 3. Ending configuration setting Step 4. Repairing data * Resuming the operation Figure 4-33 Procedure to Cancel Virtual Capacity Logical Disk Alarm Step 1. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. Step 2. Canceling virtual capacity logical disk alarm Use the Setting Disk Array operation of configuration setting to cancel the alarm of the virtual capacity logical disk in which there was insufficient capacity. For details, refer to Changing Responses. 66

73 Chapter 4 Using the Thin Provisioning Function Step 3. Ending configuration setting End configuration setting and resume disk array monitoring. Step 4. Repairing data Restore backed up data or otherwise restore data to a stage at which its integrity is ensured. If the logical disk that runs on a Windows OS is set to Make an LD inaccessible when the capacity becomes insufficient, the volume exceeding the quota becomes invisible to the OS (The volume becomes inaccessible even though it seems to exist on OS). In such a case, make the OS recognize the volume again with the procedures below. Step 4-1. Stopping processes that could access the volume (Explorer or command prompt) Step 4-2. Rescanning the disk with Disk Management Step 4-3. Checking volume information with Disk Management Step 4. Rebuilding data * Resuming operation Step 4-1. Stopping processes that could access the volume Disk rescanning may be interrupted if Explorer or command prompt is accessing the relevant volume. So, close the windows of such processes. Step 4-2. Rescanning the disk Open Disk Management and rescan the disk. Step 4-3. Checking volume information After completing rescanning the disk, check that the relevant volume is correctly recognized again referring to the volume list. Also, check that the drive letter remains the same. If the volume is not correctly recognized again, restart the server. Even if Make an LD inaccessible is specified as the logical disk response when the capacity becomes insufficient, volume may seem to be accessible due to some OS s cache control. Even in this case, access is not possible if the Delay writing failed message appears. Rebuild the volume with the above procedures. 67

74 Chapter 4 Using the Thin Provisioning Function Resume business after confirming that the virtual capacity logical disk for which the alarm was canceled can be used by the business. 68

75 Chapter 4 Using the Thin Provisioning Function 4..4 Restoriing Data Data restoration for when data corruption occurs due to faults is explained below. Application server Disk array Virtual capacity logical disk Data of virtual capacity logical disk corrupted due to operation mistake from application server Virtual capacity pool Actual capacity allocated to corrupted data Data of virtual capacity logical disk corrupted due to physical disk failure P P P P P P Physical disks Figure 4-34 Virtual Capacity Logical Disk Data Corruption If data of a virtual capacity logical disk has been corrupted during operation, actual capacity will have been allocated incorrectly to the virtual capacity logical disk. Events in which corruption of data written to a virtual capacity logical disk occurs and countermeasures to them are explained below. Events in which virtual capacity logical disk data corruption occurs If constituent physical disks of a virtual capacity pool failed For countermeasures, refer to Restoring Data After Physical Fault. If data written to a virtual capacity logical disk was logically corrupted For countermeasures, refer to Restoring Data After Logical Fault. 69

76 Chapter 4 Using the Thin Provisioning Function Resttoriing Datta Afftter Physiicall Faulltt If multiple faults have occurred on physical disks of a virtual capacity pool, there is a pool fault and data of virtual capacity logical disks belonging to that virtual capacity pool becomes corrupted and wholly unusable. Use can continue if virtual capacity logical disks are in a RAID configuration even if one fault (two if RAID6) occurs on a physical disk. In this case, just replacing the physical disk at fault restores the pool to its original state. However, if multiple faults occur on physical disks in the same virtual capacity pool, there is a pool fault. The restoration procedure for when a pool fault occurs in a virtual capacity pool is shown below. Business must be stopped for the operations below. When operated from the ism client, have the procedure carried out by a system administrator (L3). Step 1. Unbinding disk configuration * Stopping business Step 2. Replacing fault disk * Entrust this task to maintenance personnel. Step 3. Rebinding disk configuration Step 4. Restoring data * Resuming business Figure 4-35 Procedure for Data Restoration after Physical Fault Step 1. Unbinding disk configuration Temporarily unbind the virtual capacity pool in which the fault occurred from the ism client. In order to unbind the virtual capacity pool, you must cancel allocation to the application server of the virtual capacity logical disks belonging to the virtual capacity pool on which the fault occurred and unbind all of the virtual capacity logical disks. For details on unbinding pools, refer to Configuration Setting Tool User s Manual (GUI). 70

77 Chapter 4 Using the Thin Provisioning Function Before unbinding the disk configuration, stop all business that uses virtual capacity disks belonging to the virtual capacity pool that had the pool fault, as well as the application server as a whole. Each resource unbound here is set up again in Step 3. When it is, since everything that is set must return to the same value as before unbinding, confirm that nothing has been changed from the SG specification and make a record of it if there were any changes. Step 2. Replacing fault disk Replace the physical disk on which the fault occurred by making a request to maintenance personnel. Step 3. Rebinding disk configuration Return all resources unbound in Step 1 to the same configuration as before the fault occurred. Everything that is set up again must be set up accurately based on the SG specification so that values are the same as before unbinding. Data restoration cannot be made normally if there are differences from before unbinding. After rebinding the disk configuration, start up the application server and confirm that logical disks recognized by the application server are correct. Resume business after confirming that a virtual capacity logical disk for which data was restored can be used by the business. 71

78 Chapter 4 Using the Thin Provisioning Function Resttoriing Datta Afftter Logiicall Faulltt Countermeasures for when data of a virtual capacity logical disk is logically corrupted are shown below. (1) If data for which actual capacity was allocated was corrupted Restore from backup data. (2) If actual capacity was newly allocated due to writing invalid data Restore from backup data after rebinding virtual capacity logical disk. (1) Restoring from backup data If data for which actual capacity was allocated was corrupted, stop business and restore backed up data or otherwise restore data to a stage at which its integrity is ensured. Then resume business after confirming that the virtual capacity logical disk that was restored can be used by the business. Data corrupted Virtual capacity logical disk Restore corrupted data Virtual capacity logical disk Figure 4-36 Data Restoration when Allocated Data was Corrupted (2) Restoring from backup data after rebinding virtual capacity logical disk The procedure to restore corrupted data when actual capacity was newly allocated to a virtual capacity logical disk due to writing invalid data is shown below. Data corrupted Virtual capacity logical disk Restore corrupted data after rebinding virtual capacity logical disk Virtual capacity logical disk Figure 4-37 Repairing Corrupted Data for which Actual Capacity was Newly Allocated Business must be stopped for the operations below. When operated from the ism client, have the procedure carried out by a system administrator (L3). 72

79 Chapter 4 Using the Thin Provisioning Function Step 1. Saving virtual capacity logical disk information * Stopping business Step 2. Starting configuration setting Step 3. Canceling allocation to application server Step 4. Unbinding virtual capacity logical disk Step 5. Binding virtual capacity logical disk Step 6. Allocation to application server Step 7. Ending configuration setting Step 8. Restoring data * Resuming business Figure 4-38 Procedure to Restore Corrupted Data for which Actual Capacity was Newly Allocated Step 1. Saving virtual capacity logical disk information To restore the virtual capacity logical disk the same as before the fault occurred after rebinding and reallocating it to the application server, make note of all information needed for rebinding and reallocating. In addition, if optional software functions such as those for paired virtual capacity logical disks are configured, also make note of all of their configuration information. Before saving virtual capacity logical disk information, stop business that uses the virtual capacity logical disk in which data was corrupted. Step 2. Starting configuration setting Start configuration setting by selecting the disk array to which the operation applies in the main window of ism client (Web GUI) and activating Configuration Setting. 73

80 Chapter 4 Using the Thin Provisioning Function Step 3. Deallocation from application server Use the Setting Access Control operation of configuration setting to cancel the allocation of the virtual capacity logical disk to the LD set of the application server. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). Before the Setting Access Control operation, stop the application server. Step 4. Unbinding virtual capacity logical disk Use the LD Individual Bind/Unbind operation of configuration setting to unbind the virtual capacity logical disk. For details on unbinding logical disks, refer to Configuration Setting Tool User s Manual (GUI). Step 5. Binding virtual capacity logical disk Use the LD Individual Bind/Unbind operation of configuration setting to activate the LD Binding Wizard and bind the virtual capacity logical disk the same as before the occurrence of the fault saved in Step 1. For details, refer to Binding Virtual Capacity Logical Disks. Everything that is set up again must be set up so that values are the same as before unbinding. Repairs cannot be made normally if there are differences from before unbinding. Step 6. Allocation to application server Use the Setting Access Control operation of configuration setting to allocate the virtual capacity logical disk to the LD set of the application server the same as before the occurrence of the fault saved in Step 1. For details on configuration change and operations of Access Control, refer to Configuration Setting Tool User s Manual (GUI). After the Setting Access Control operation, start up the application server and confirm that the logical disk recognized by the application server is correct. 74

81 Chapter 4 Using the Thin Provisioning Function Step 7. Ending configuration setting End configuration setting and resume disk array monitoring. Step 8. Repairing data Restore backed up data or otherwise restore data to a stage at which its integrity is ensured. Resume business after confirming that the virtual capacity logical disk in which data was restored can be used by the business. Although it is also possible to restore data after initializing the virtual capacity logical disk on which the fault occurred, this is not recommended because initializing a virtual capacity logical disk is extremely time consuming. 75

82 Chapter 5 Operations of the Thin Provisioning Function Chapter 5 Operations of the Thin Provisioning Function This chapter explains in concrete terms how to perform operations of the thin provisioning function from ism O Ovveerrvviieew wo off O Op peerraattiio on nss iin n iis SM M ism provides the functionality to bind virtual capacity pools and virtual capacity logical disks, change their settings, and display information. Operations from ism are provided through ism client (Web GUI), which makes it possible to perform operations easily using intuitive images from a graphical user interface. If the OS on the application server is Windows, the storage area that is no longer needed can be deallocated with the area deallocation command to reduce the actual used capacity in the pool. { Binding virtual capacity pools and virtual capacity logical disks { Changing virtual capacity pool and virtual capacity logical disk settings { Displaying virtual capacity pool and virtual capacity logical disk information Application server/ Backup server Client Management server Storage Manager SAN BaseProduct AccessControl ThinProvisioning LAN Figure 5-1 Operation of Thin Provisioning Function from ism 76

83 Chapter 5 Operations of the Thin Provisioning Function The functionality provided in ism is shown below. Table 5-1 Setup Operations from ism Operation Storage User Partition User L1 L2 L3 L1 L2 L3 Bind a virtual capacity pool Expand a virtual capacity pool Unbind a virtual capacity pool Change an actual capacity threshold of a virtual capacity pool * Change an actual capacity threshold (pre) of a virtual capacity pool * Cancel alarm of a virtual capacity pool Bind a virtual capacity logical disk * Expand a virtual capacity logical disk * Unbind a virtual capacity logical disk * Change an LD capacity quota of a virtual capacity logical disk * Change an LD capacity threshold of a virtual capacity logical disk * Cancel alarm of a virtual capacity logical disk Change the response of a virtual capacity logical disk * : Able to operate : Unable to operate * : Able to operate only on resources allocated to partition Storage user: User who manages disk array as a whole Partition user: User who manages specific partitions L1: Standard user Disk array monitoring, status display, and other reference are permitted. L2: Operator Operations necessary for operating are permitted. L3: System administrator Disk array configuration setting and all other operations are permitted. Information about virtual capacity pools and virtual capacity logical disks can be referenced at user level L1 (standard user) or higher. A partition user can reference only the information of virtual capacity pools and virtual capacity logical disks allocated to a partition. 77

84 Chapter 5 Operations of the Thin Provisioning Function 5..2 iism Maiin Wiindow The ism main window is the screen that is displayed first when connecting to the ism server from the client. Configuration information for disk arrays being monitored by ism and the states of resources are displayed in the ism main window. Information related to virtual capacity pools Displayed in the Pool list screen and Pool detail information screen Information related to virtual capacity logical disks Displayed in the Logical disk list screen and Logical disk detail information screen If an excess over actual capacity threshold or excess over actual capacity threshold (pre) occurred in a virtual capacity pool or if excess over LD capacity threshold occurred in a virtual capacity logical disk, the icon is displayed for the disk array. Moreover, if an insufficient capacity occurred in a virtual capacity pool or if an excess over LD capacity quota or insufficient capacity occurred in a virtual capacity logical disk, the icon is displayed for the disk array. For the configuration and display items of the ism main window and details on how it operates, refer to User s Manual of the OS being used. Tool bar Configuration and information list display areas Message display area Figure 5-2 Main Window of ism Client (Web GUI) 78

85 Chapter 5 Operations of the Thin Provisioning Function (1) Pool list screen The pool list screen is the screen (portion in dotted lines in Figure 5-3) that is displayed when Pool is selected (left-clicked) in the configuration display area. It displays pool names and operating status, as well as capacity and other attribute information. Figure 5-3 Pool List Screen Contents that are related to the thin provisioning function are described below. For other contents, refer to User s Manual for the OS being used. Free area, Classification, Actual capacity threshold and Actual capacity threshold (pre) are hidden by default. To display them, right-click the item name and specify to display. (i) Icon (Operating status/monitoring status of pool) Depending on the icon beside the pool number, the operating status or monitoring status of a virtual capacity pool is being displayed. Icon State Table 5-2 Icons Displayed and their Meanings Virtual capacity pool is operating normally. Excess over actual capacity threshold or excess over actual capacity threshold (pre) occurred in virtual capacity pool. Insufficient capacity occurred in virtual capacity pool. 79

86 Chapter 5 Operations of the Thin Provisioning Function (ii) Status Displays the operating status of the virtual capacity pool and events that occur. Ready: Virtual capacity pool is operating normally Fault (over capacity): Insufficient capacity occurred in virtual capacity pool (iii) Capacity Displays the capacity of the virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) (iv) Used capacity Displays the used capacity of the virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) (v) Actual capacity Displays the capacity actually allocated in the physical disk that is allocated for the virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1. ) (vi) Actual used capacity Displays the total actual capacity allocated from the virtual capacity pool to virtual capacity logical disks in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) If an excess over actual capacity threshold (pre) or actual capacity threshold occurred, * is displayed at the left of the actual used capacity. (vii) Free capacity Displays the unused capacity of pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) (viii) Type Displays the pool type. Dynamic (Virtual): Virtual capacity pool (ix) Actual capacity threshold Displays the actual capacity threshold of the virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) If an excess over actual capacity threshold occurred, * is displayed at the left of the actual used capacity. 80

87 Chapter 5 Operations of the Thin Provisioning Function (x) Actual capacity threshold (pre) Displays the actual capacity threshold (pre) of the virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1. ) If an actual capacity threshold (pre) is not set, a blank is displayed. If an excess over actual capacity threshold (pre) occurred, * is displayed at the left of the actual used capacity. (2) Pool detail information screen Select (left-click) any pool in the configuration display area or information list display area. Subsequently selecting the [Thin Provisioning] tab of the screen displayed by right-clicking this and selecting Properties (or from the menu [View] [Status Monitoring] [Properties]) displays detail information about the virtual capacity pool. Figure 5-4 Pool Detail Information ([Thin Provisioning] Tab) (i) Capacity Displays the capacity of the virtual capacity pool. The display contents are the same as (1) Pool list screen. (ii) Used Capacity Displays the used capacity of the virtual capacity pool. The display contents are the same as (1) Pool list screen. 81

88 Chapter 5 Operations of the Thin Provisioning Function (iii) Free Capacity Displays the free capacity of the virtual capacity pool. The display contents are the same as (1) Pool list screen. (iv) Actual Capacity Displays the capacity actually allocated in the physical disk that is allocated for the virtual capacity pool. The display contents are the same as (1) Pool list screen. (v) Actual Used Capacity Displays the actual capacity allocated from the virtual capacity pool to logical disks and the percentage (%) of the actual used capacity in the actual capacity. The display contents are the same as (1) Pool list screen. (vi) Actual Capacity Threshold Displays the actual capacity threshold of the virtual capacity pool and the percentage (%) of the actual capacity threshold in the actual capacity. The display contents are the same as (1) Pool list screen. (vii) Actual Capacity Threshold (pre) Displays the actual capacity threshold (pre) of the virtual capacity pool and the percentage (%) of the actual capacity threshold in the actual capacity. If the actual capacity threshold (pre) is not set, - is displayed. The display contents are the same as (1) Pool list screen. 82

89 Chapter 5 Operations of the Thin Provisioning Function (3) Logical disk list screen The logical disk list screen is the screen (portion in dotted lines in Figure 5-5) that is displayed when Logical Disk is selected (left-clicked) in the configuration display area. It displays logical disk names and states, as well as capacity and other attribute information. Figure 5-5 Logical Disk List Screen Contents that are related to the thin provisioning function are described below. For other contents, refer to User s Manual for the OS being used. Free area, Classification, Actual capacity threshold and Actual capacity threshold (pre) are hidden by default. To display them, right-click the item name and specify to display. (i) Icon (Operating status/monitoring status of logical disk) Depending on the icon beside the logical disk number, the operating status or monitoring status of a virtual capacity logical disk is being displayed. Icon Table 5-3 Icons Displayed and their Meanings State Virtual capacity logical disk is operating normally. Excess over LD capacity threshold occurred at virtual capacity logical disk. Excess over LD capacity quota or Insufficient capacity occurred at virtual capacity logical disk. 83

90 Chapter 5 Operations of the Thin Provisioning Function (ii) Status Displays the operating status of the virtual capacity logical disk and occurrence of event. Ready: Virtual capacity logical disk is operating normally. Fault (over quota): An excess over LD capacity quota occurred in a virtual capacity logical disk. Fault (over capacity): An insufficient capacity occurred in the virtual capacity pool to which a virtual capacity logical disk belongs. (iii) Capacity Displays the capacity of the virtual capacity logical disk in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate less than 2 decimal places. However, displays 0 byte to 100 megabyte in 0.1.) (iv) Actual used capacity Displays the actual capacity allocated from a virtual capacity pool in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 1 byte to 100 megabytes as 0.1.) If an excess over LD capacity threshold occurred, * is displayed at the left of the actual used capacity. (v) Pool number Displays the number of the virtual capacity pools to which the virtual capacity logical disk belongs (4 digits in hexadecimal). (vi) Pool name Displays the name of the pool (maximum of 32 characters) to which the logical disk belongs. (vii) LD capacity quota Displays the LD capacity quota of the virtual capacity logical disk in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, displays 0 byte to 100 megabytes as 0.1.) If the LD capacity quota is not set, a blank is displayed. (viii) Capacity allocation Displays the capacity allocation mode of the virtual capacity logical disk. Virtual: Virtual capacity logical disk (Blank): Actual capacity logical disk (ix) LD capacity threshold Displays the LD capacity threshold of the virtual capacity logical disk in gigabytes (1 gigabyte = 1,073,741,824 bytes) to 1 decimal place. (Truncate it at the second decimal place. However, 84

91 Chapter 5 Operations of the Thin Provisioning Function displays 0 byte to 100 megabytes as 0.1.) If the LD capacity threshold is not set, a blank is displayed. (4) Logical disk detail information screen Select (left-click) any logical disk in the configuration display area or information list display area. Subsequently selecting the [Thin Provisioning] tab of the screen displayed by right-clicking this and selecting Properties (or from the menu [View] [Status Monitoring] [Properties]) displays detail information about the virtual capacity logical disk. Figure 5-6 Logical Disk Detail Information ([Thin Provisioning] Tab) Contents that are related to the thin provisioning function are described below. For other contents, refer to User s Manual for the OS being used. (i) Capacity Displays the capacity of the virtual capacity logical disk The display contents are the same as (3) Logical disk list screen. (ii) Actual Used Capacity Displays the actual capacity allocated from the virtual capacity pool and the percentage (%) of the capacity. 85

92 Chapter 5 Operations of the Thin Provisioning Function The display contents are the same as (3) Logical disk list screen. (iii) LD Capacity Quota Displays the LD capacity quota of the virtual capacity logical disk and the percentage (%) of the capacity. If the LD capacity quota is not set, - is displayed. The display contents are the same as (3) Logical disk list screen. (iv) LD Capacity Threshold Displays the LD capacity threshold of the virtual capacity logical disk and the percentage (%) of the capacity. If the LD capacity threshold is not set, - is displayed. The display contents are the same as (3) Logical disk list screen. (v) Capacity Allocation Displays the logical disk capacity allocation mode. For a virtual capacity logical disk, Virtual is displayed. (vi) Insufficient capacity occurs Displays the LD response when the capacity becomes insufficient (the actual capacity becomes insufficient or the quota is exceeded). The capacities of the LD capacity quota and the LD capacity threshold are rounded to the nearest 256 MB above. When the logical disk capacity is small (25 GB or less), the capacities of the actual used capacity, LD capacity quota, and LD capacity threshold might be the same if their percentage values are different. 86

93 Chapter 5 Operations of the Thin Provisioning Function Acttiivattiing Conffiigurattiion Settttiing Screen Binding and setting change for virtual capacity pools and virtual capacity logical disks are performed from configuration setting in the ism client. If thin provisioning can be used for a D Series disk array other than D8, it is possible to bind a virtual capacity pool or virtual capacity logical disk by using Quick Configuration. For details about how to display these settings, refer to Activating Quick Configuration. To activate the Configuration Setting screen, select a disk array in the ism main window and then display the Configuration Setting (Menu) screen by either selecting [File] [Configuration Setting/References] [Configuration Setting] from the menu or clicking [Configuration Setting/Reference] from the toolbar and selecting [Configuration Setting]. For details on activating the Configuration Setting screen, refer to Configuration Setting Tool User s Manual (GUI). Figure 5-7 Selecting Configuration Setting 87

94 Chapter 5 Operations of the Thin Provisioning Function Figure 5-8 Configuration Setting (Menu) Screen [Storage Configuration Setting] button: Binds, expands, or unbinds virtual capacity pool or virtual capacity logical disk, or changes actual capacity threshold or LD capacity threshold or quota. [Management Setting] button: Cancels virtual capacity pool or virtual capacity logical disk alarm. 88

95 Chapter 5 Operations of the Thin Provisioning Function Acttiivattiing tthe Pooll Biindiing Wiizard Virtual capacity pool binding takes the form of a wizard. A new virtual capacity pool can be bound by setting it as directed by the wizard. The LD Individual Bind/Unbind screen is displayed by clicking the [Storage Configuration Setting] button from the Configuration Setting (Menu) screen. Figure 5-9 LD Individual Bind/Unbind Screen Clicking the [Pool Binding] button from the LD Individual Bind/Unbind screen activates the Pool Binding Wizard. 89

96 Chapter 5 Operations of the Thin Provisioning Function Acttiivattiing tthe LD Biindiing Wiizard Virtual capacity logical disk binding takes the form of a wizard. A new virtual capacity logical disk can be bound by setting it as directed by the wizard. The LD Individual Bind/Unbind screen is displayed by clicking the [Storage Configuration Setting] button from the Configuration Setting (Menu) screen. Figure 5-10 LD Bind/Unbind Screen Clicking the [LD Binding] button from the LD Individual Bind/Unbind screen activates the LD Binding Wizard. 90

97 Chapter 5 Operations of the Thin Provisioning Function Acttiivattiing Quiick Conffiigurattiion If thin provisioning is enabled for a D Series disk array other than D8, it is possible to bind a virtual capacity pool or virtual capacity logical disk by using Quick Configuration. To display the LD Binding (FC) window, in the ism main window, either select [File] [Configuration Settings/References] [Quick Configuration] [LD Binding (FC)], or click [Configuration Setting/Reference] on the toolbar, and then select [LD Binding (FC)] [Quick Configuration]. (For details, refer to Figure 5-11 LD Binding (FC).) For details about the settings, refer to Quick Binding of Virtual Capacity Logical Disks. Figure 5-11 LD Binding (FC) 91

98 Chapter 5 Operations of the Thin Provisioning Function 5..3 Thiin Proviisiioniing Confiiguratiion As thin provisioning configuration, the items below can be set for pools and logical disks in configuration setting. Virtual capacity pool binding Virtual capacity logical disk binding Virtual capacity pool expansion Virtual capacity pool actual capacity threshold change Virtual capacity logical disk LD capacity quota or threshold change Alarm cancellation Changing the response when there is not enough capacity for a virtual capacity logical disk Binding a virtual capacity pool or virtual capacity logical disk by using Quick Configuration Since operations such as virtual capacity pool unbinding and virtual capacity logical disk expansion and unbinding are the same as for actual capacity pools and logical disks, refer to Configuration Setting Tool User s Manual (GUI) concerning them Biindiing Viirttuall Capaciitty Poolls A virtual capacity pool is bound as part of a dynamic pool. The physical disk composition of a virtual capacity pool is as follows. Logical disk configuration: Dynamic pool Dynamic pool Dynamic pool RAID6 (4+PQ)/(8+PQ) RAID-TM (triple mirror) RAID1 (mirror) For a detailed explanation of RAID, refer to Appendix C RAID of the Configuration Setting Tool User s Manual (GUI). The logical disks bound in a virtual capacity pool all are virtual capacity logical disks. Virtual capacity pool binding takes the form of a wizard. A new pool can be bound by setting it as directed by the wizard. 92

99 Chapter 5 Operations of the Thin Provisioning Function (1) Starting the pool binding wizard Clicking the [Pool Binding] button in the LD Individual Bind/Unbind screen displays the Welcome to the Pool Binding Wizard screen. Figure 5-12 Welcome to the Pool Binding Wizard [Next] button: [Cancel] button: The next screen is displayed. The next screen varies according to the disk array configuration and the physical disks implemented. Displays an end query message before ending the wizard. 93

100 Chapter 5 Operations of the Thin Provisioning Function (2) Selecting the PD group When the [Next] button of the Welcome to the Pool Binding Wizard screen is clicked, the Select the PD group screen is displayed if there are multiple PD groups. Figure 5-13 Select the Pool The screen is used to select the PD group to use in pool binding. PD group: [Next] button: [Back] button: [Cancel] button: PD groups implemented in the disk array are displayed. The Select the PD type screen is displayed if there are multiple types of physical disk, and the Select the pool type screen is displayed if there is only one type of physical disk. Returns to the Welcome to the Pool Binding Wizard screen. Displays an end query message before ending the wizard. This screen is not displayed for disk arrays other than the D8 Series. The screen is also not displayed if there is only one PD group. 94

101 Chapter 5 Operations of the Thin Provisioning Function (3) Selecting the PD type The Select the PD type screen is displayed if there are multiple types of physical disk. Figure 5-14 Select the PD Type The screen is used to select the type of physical disk to use in pool binding. PD type: The types of physical disks implemented in the disk array and the number of them are displayed. [Next] button: [Back] button: [Cancel] button: The Select the pool type screen is displayed. Returns to the previous screen. Displays an end query message before ending the wizard. The type of physical disks implemented differs depending on the disk array unit. For details on the physical disk type implemented, refer to manuals that come with the disk array. 95

102 Chapter 5 Operations of the Thin Provisioning Function (4) Selecting the pool type Clicking the [Next] button in the previous screen displays the Select the pool type screen. The previous screen differs according to the disk array and the number of types of physical disks implemented. Figure 5-15 Select the Pool Type The screen explains the pools and RAID types that can be bound. Dynamic: Basic: [Next] button: [Back] button: [Cancel] button: RAID type RAID6(8+PQ), RAID6(4+PQ), RAID-TM, or RAID1 can be selected. This is a pool in which pool capacity expansion and logical disk capacity expansion are possible. Dynamic pool must be selected when binding a pool for thin provisioning. Because a pool for thin provisioning cannot be bound in a basic pool, do not select this. The Select the RAID type screen is displayed. Returns to the previous screen. Displays an end query message before ending the wizard. 96

103 Chapter 5 Operations of the Thin Provisioning Function (5) Selecting the RAID type Clicking the [Next] button in the Select the pool type screen displays the Select the RAID type screen. Figure 5-16 Select the RAID Type (Dynamic Pool) RAID type selection radio buttons: Select the RAID type of the pool to bind. Choices differ according to the type selection in the Select the pool type screen. [Next] button: The Select the PD type screen is displayed. [Back] button: Returns to the Select the pool type screen. [Cancel] button: Displays an end query message before ending the wizard. RAID types that can be bound differ depending on the physical disk type. For details of RAID types that can be selected, refer to manuals that come with the disk array. 97

104 Chapter 5 Operations of the Thin Provisioning Function (6) Selecting PD Clicking the [Next] button in the Select the RAID type screen displays the Select PD screen. Figure 5-17 Select PD ([Visual] Tab) 98

105 Chapter 5 Operations of the Thin Provisioning Function Clicking the [List] tab under [Unused PDs] displays the following screen. Figure 5-18 Select PD ([List] Tab) RAID Type: The RAID type of the pool to bind is displayed. Number of disks that can be bound: The number of physical disks needed to bind the pool is displayed. Unused PDs: Unused physical disks are listed. [Visual] tab: Switches to a visual screen. A list of the physical disks that can be selected is displayed in the visual screen. DExx (xx = 00, 01 ) displayed in the [Visual] tab shows the number of the disk array enclosure. [List] tab: Switches to a list screen. Pool PDs: A list of the physical disks that make up the pool is displayed. [Add] button: Selecting a physical disk to use in the pool binding from Unused PDs and clicking this button adds the selected physical disk to Pool PDs. [Delete] button: To delete a physical disk that is a constituent of the pool, select that physical disk from Pool PDs and click this button. The selected physical disk becomes an unused disk. [Next] button: The Select the virtual capacity type screen is displayed. [Back] button: Returns to the Select the RAID type screen. [Cancel] button: Displays an end query message before ending the wizard. 99

106 Chapter 5 Operations of the Thin Provisioning Function The transfer speed is only displayed for disk arrays for which 6-Gbps SAS disks can be installed. 100

107 Chapter 5 Operations of the Thin Provisioning Function (6)-1 About errors when selecting physical disks The messages below are displayed if there is no RAID type that can be bound by using the number of selected physical disks or if that of selected physical disks is exceeded or deficient: [25201], [25202], and [25227] The number of units displayed in [25201] may be a different value depending on the disk array. Figure 5-19 Message Boxes 101

108 Chapter 5 Operations of the Thin Provisioning Function (6)-2 About warning when selecting physical disks If physical disks that have different capacities or rotational speeds are selected, the warning message below (continuable) is displayed: [25293] Confirm whether the selected disks are correct. Figure 5-20 Message Box For a disk array for which the disk drive transfer speed is displayed, the same warning message is displayed if multiple transfer speeds are mixed together ([25293]). Confirm that the selected disk is correct. Figure 5-21 Message Box 102

109 Chapter 5 Operations of the Thin Provisioning Function (7) Selecting the virtual capacity type Clicking the [Next] button in the Select PD screen displays the Select the virtual capacity type screen. Figure 5-22 Select the Virtual Capacity Type Actual capacity pool: Select this when binding a conventional dynamic pool. Virtual capacity pool: Select this when binding a virtual capacity pool. Actual: The actual capacity of the pool is displayed. Actual capacity is the capacity that is determined by the number and capacities of physical disks selected. Pool capacity: Specifies the pool capacity of the virtual capacity pool. The capacity specified here becomes the capacity of the pool. Although the specified pool capacity can be expanded following pool binding, be aware that it cannot be shrunk. A capacity that is less than the actual capacity cannot be specified. 103

110 Chapter 5 Operations of the Thin Provisioning Function Specify the capacity for the virtual capacity pool equal to or greater than the amount of logical disks to bind in that pool plus 2 GB. Actual capacity threshold: Specifies the threshold and the threshold (pre). For a virtual capacity pool, thresholds can be specified in two stages. Threshold: Specifies the threshold of the virtual capacity pool as a ratio (%). The values that can be specified are 1 through 99. The capacity itself is displayed to the right. There will be a warning if what is actually allocated exceeds this value, as opposed to the actual capacity. Threshold (Pre): If a threshold was specified, this can be specified as another threshold. Although functionally the same as the threshold, a value that exceeds the threshold cannot be set. What threshold (pre) means it that there will be a warning one step ahead of a warning due to the threshold. [Next] button: [Back] button: [Cancel] button: The Set detailed parameters for pool binding screen is displayed. Returns to the Select PD screen. Displays an end query message before ending the wizard. 104

111 Chapter 5 Operations of the Thin Provisioning Function (8) Setting detailed parameters for pool binding Clicking the [Next] button in the Select the virtual capacity type screen displays the Set detailed parameters for pool binding screen. Figure 5-23 Set Detailed Parameters for Pool Binding Pool Name: Input the name of the pool. In the initial display of the screen, this is automatically assigned and displayed in Pool+number (4 digits in hexadecimal) format. Identical pool names cannot be set within a disk array. The messages below are displayed if a pool name is not input or is a duplicate: [25203], [25205] Figure 5-24 Message Boxes 105

112 Chapter 5 Operations of the Thin Provisioning Function A pool name that does not follow the rules shown below cannot be set. Number of characters used 1 to 32 Characters used Alphabetic A through Z (a through z) * Uppercase and lowercase characters are differentiated Numeric 0 through 9 Underscore _ Slash / * All characters must be one-byte characters. The message below is displayed if a pool name does not follow the rules: [25217] Figure 5-25 Message Box Rebuild Time: Specifies the time of rebuild action in the disk array if faults occur in physical disks. A rebuild time can be specified within the range from 0 to 255 hours. Although action is taken in the fastest time if 0 is specified, set the rebuild time to a suitable value after taking into account the host I/O load. The time is a goal and rebuild action is not necessarily taken in the time specified. Alloc. Attr. of Partition: Displayed only if the partitioning function is available, this specifies the partition allocation attribute of the pool. If [exclusive] is selected, it is possible to perform partition allocation for the pool. If [shared] is selected, it is possible to perform partition allocation for logical disks in the pool. The default (preset value) is exclusive. [Next] button: [Back] button: [Cancel] button: The Confirm pool binding parameters screen is displayed. Returns to the Set detailed parameters for pool binding screen. Displays an end query message before ending the wizard. 106

113 Chapter 5 Operations of the Thin Provisioning Function (9) Confirming pool binding parameters Clicking the [Next] button in the Set detailed parameters for pool binding screen displays the Confirm pool binding parameters screen. Figure 5-26 Confirm Pool Binding Parameters Pool Type: RAID Type: PD Type: Pool Number *1: Pool Name: Pool Capacity: Actual Capacity: Rebuild Time: Node Number: PD Group Number: Allc. Attr. of Partition: Threshold: Threshold (Pre): Pool PDs: Number of PDs: Type of pool Type of RAID for binding pool Type of PD that make up pool Number of pool to be bound Name of pool to be bound Capacity of pool to be bound (Value specified as virtual capacity) Actual capacity of pool to bind Pool rebuild time Number of node to which pool belongs Number of PD group to which pool belongs Partition allocation attribute of pool Threshold set in virtual capacity pool Threshold (pre) set in virtual capacity pool List of physical disks to bind pool Number of physical disks that make up pool 107

114 Chapter 5 Operations of the Thin Provisioning Function *1: Pool numbers are calculated automatically and available numbers are allocated in order starting from 0000h. For the D8 series, bands of numbers are fixed by node as shown below. Node 0 : 0000h to 00ffh Node 1 : 0100h to 01ffh Node 2 : 0200h to 02ffh Node 3 : 0300h to 03ffh [Next] button: [Back] button: [Cancel] button: An execution query message is displayed. Returns to the Set detailed parameters for pool binding screen. Displays an end query message before ending the wizard. Figure 5-27 Pool Binding Query Message 108

115 Chapter 5 Operations of the Thin Provisioning Function (10) Pool binding complete If pool binding succeeds, the following screen is displayed. Figure 5-28 Pool Binding Complete [Finish] button: Ends the wizard. 109

116 Chapter 5 Operations of the Thin Provisioning Function Biindiing Viirttuall Capaciitty Logiicall Diisks Virtual capacity logical disk binding takes the form of a wizard. A virtual capacity logical disk can be bound to a virtual capacity pool by setting it as directed by the wizard. (1) Starting the LD binding wizard Clicking the [LD Binding] button in the LD Individual Bind/Unbind screen displays the Welcome to the LD Binding Wizard screen. Figure 5-29 Welcome to the LD Binding Wizard [Next] button: [Cancel] button: The Select the pool screen is displayed. Displays an end query message before ending the wizard. 110

117 Chapter 5 Operations of the Thin Provisioning Function (2) Selecting the pool Clicking the [Next] button in the Welcome to the LD Binding Wizard screen displays the Select the pool screen. Figure 5-30 Select the Pool Pool List: [Next] button: [Back] button: [Cancel] button: Select the pool for binding the logical disk from the list. To bind a virtual capacity logical disk, select a virtual capacity pool. Select a pool for which Dynamic (Virtual) is displayed in Type. If a virtual capacity pool was specified, the Select the LD usage screen is displayed. Returns to the Welcome to the LD Binding Wizard screen. Displays an end query message before ending the wizard. If there is no free area in which a logical disk can be bound in the selected pool, the message below is displayed and pool selection must be repeated. 111

118 Chapter 5 Operations of the Thin Provisioning Function Figure 5-31 Message Box The message below is displayed if only a control volume can be bound in the free area of the selected pool. Figure 5-32 Message Box If [Yes] is selected, the Specify the number of LDs Control Volume screen is displayed. Logical disks cannot be bound to a pool in the following cases. Configuration setting is prohibited. A cache resident disk exists in the pool. Rotation is stopped. The number of bound logical disks on the node is

119 Chapter 5 Operations of the Thin Provisioning Function (3) Selecting the LD usage Clicking the [Next] button when a virtual capacity pool was selected in the Select the pool screen displays this screen. Figure 5-33 Select the LD Usage If [Special usage] is selected, the screen becomes as follows. 113

120 Chapter 5 Operations of the Thin Provisioning Function Figure 5-34 Select the LD Usage Specifying Special Usage Specify the usage of the LD: Select the usage of the logical disk to bind from the following. General usage Specify this when binding a general usage of logical disk. Special usage Specify this when binding a control volume, System Volume, or other special usage of logical disk. The following radio buttons are displayed if [Special usage] is checked. Control Volume This is a small capacity logical disk that has a capacity of 256 MB. System Volume *1 This is a volume for saving storage system information. *1: Since it is not possible to bind a System Volume in the following case, the button is not displayed. The user is a partition user. [Next] button: Displays the screens shown below depending on the button checked. If [General usage] is checked The Specify the number of LDs and LD capacity screen is displayed. If [Control Volume] is checked 114

121 Chapter 5 Operations of the Thin Provisioning Function The Specify the number of LDs Control Volume screen is displayed. If [System Volume] is checked The Set detailed parameters for LD binding System Volume screen is displayed. [Back] button: [Cancel] button: Returns to the Select the pool screen. Displays an end query message before ending the wizard. Only one System Volume can exist in a disk array. Therefore, the screen below is displayed if you try to bind a System Volume when a system volume already exists. Figure 5-35 Message Box The screen below is displayed if the free capacity of the pool is insufficient when you try to bind a System Volume. Figure 5-36 Message Box 115

122 Chapter 5 Operations of the Thin Provisioning Function (4)-1 Specifying the number of LDs and LD capacity Clicking the [Next] button when [General Usage] is selected in the Select the LD usage screen displays the Specify the number of LDs and LD capacity screen. Figure 5-37 Specify the Number of LDs and LD Capacity Number of LDs: Specifies the number of logical disks to bind. The logical disk capacity to be bound is the capacity in GB obtained by dividing the pool s free capacity by the number of units specified. Set LD capacity: Specifies the logical disk capacity to bind by the method shown below. Quick pick Specify capacity by selecting the optimum recommended capacity for binding from a drop-down list. Existing LD Select a logical disk that has already been bound to specify the same capacity as the selected logical disk. A logical disk can also be selected from the LD Specification screen by clicking the [Reference] button. (Refer to (4)-2 Specifying a logical disk.) LD capacity Directly specify the capacity in GB. The maximum number of logical disks that can be bound is calculated automatically according to the numerical value specified. 116

123 Chapter 5 Operations of the Thin Provisioning Function The number of disks that can be bound is as follows to 4096 (1024 per node) in a disk array (*1) 1024 in one pool (*1) The number is 1,024 for a D Series disk array other than D8. The maximum capacity of logical disks that can be bound is 256 TB. The actual value that can be specified is 256 TB 1 GB. Note that if recommended capacity is specified in a dynamic pool, the pool used capacity ends up being at most about 0.2 GB greater than the logical disk capacity. For details, refer to Appendix E Notes on Binding Logical Disks (2) of the Configuration Setting Tool User s Manual (GUI). [Next] button: [Back] button: [Cancel] button: The Set detailed parameters for LD binding screen is displayed. Returns to the Select the LD usage screen. Displays an end query message before ending the wizard. About control volumes (1) A control volume is a small capacity volume that can be used in the snapshot or replication function. When using the snapshot function, it must be on a server that uses a LV (backup server side). In the replication function, it can be used if operating from the server to which the RV is connected (backup server side). (2) In binding a control volume, set the capacity by following the procedure below. 1. Select [Special usage] in Select the LD usage in the LD Binding Wizard. 2. Select [Control Volume]. (3) For a logical disk bound as a control volume, its usage (attribute) can be identified. When logical disk information is displayed by the ism client, identification information showing that it is a control volume is displayed as the usage (attribute) of the logical disk. 117

124 Chapter 5 Operations of the Thin Provisioning Function (4)-2 Specifying a logical disk Clicking the [Reference] button after checking Existing LD displays the screen below. Figure 5-38 LD Specification By selecting a logical disk from the list, it is possible to bind a logical disk of the same capacity. A reason such as the following is displayed in Non-specifiability Info if it is not selectable. Excess over capacity: The capacity of this logical disk is greater than the free capacity of the pool. Capacity unit disagreement: A logical disk of the same capacity as this logical disk cannot be bound. Capacity unit disagreement does not occur in a disk array that supports pools. For details, refer to Appendix E Notes on Binding Logical Disks (2) of the Configuration Setting Tool User s Manual (GUI). Detail: Checking this item displays the following items. Non-specifiability Info: The reason for non-selectability is displayed. Number: Logical disk number OS Type: OS Type of the logical disk LD Name: Name of the logical disk Capacity [GB]: The capacity of the logical disk in GB is displayed. Capacity [Bytes]: The capacity of the logical disk in bytes is displayed. Pool Number: Pool number in which the logical disk exists 118

125 Chapter 5 Operations of the Thin Provisioning Function Pool Name: Pool Type: RAID Type: [OK] button: [Cancel] button: Pool name in which the logical disk exists Type of pool (basic/dynamic) in which the logical disk exists RAID type of pool in which the logical disk exists Returns to the Specify the LD capacity or Specify the number of LDs and LD capacity screen, where the capacity that was set is displayed. Returns to the Specify the LD capacity or Specify the number of LDs and LD capacity screen. The capacity that was set is not reflected. (1) It is possible to replace LD number selection in LD binding dialogs or the Number display item in the LD Specification screen with logical disk names. Refer to Client Start/Stop in the User s Manual of the OS being used regarding how to set this. When using [Detail] in the LD Specification screen, display in order of LD Name in items is substituted for ordering them by Number. (2) A logical disk is not displayed in the list in the following cases. User capacity of less than 1 GB Cache resident disk Belonging to a pool for which configuration setting is prohibited 119

126 Chapter 5 Operations of the Thin Provisioning Function (4)-3 Specify number of LDs Control volume Checking [Control Volume] in the Select the LD usage screen and clicking the [Next] button displays the Specify the number of LDs Control Volume screen. Figure 5-39 Specify the Number of LDs Control Volume Number of LDs: Specify the number of control volumes to bind. The logical disk capacity to be bound is always 0.2 GB (256 MB). [Next] button: The Set detailed parameters for LD binding screen is displayed. [Back] button: Returns to the Select the LD usage screen. [Cancel ] button: Displays an end query message before ending the wizard. For details on control volumes, refer to notes in (4)-1 Specifying the number of LDs and LD capacity. 120

127 Chapter 5 Operations of the Thin Provisioning Function (5)-1 Setting detailed parameters for LD binding The Set detailed parameters for LD binding screen can be used to confirm or change the OS type, name, starting number, quota, and threshold of logical disks. Figure 5-40 Set Detailed Parameters for LD Binding If LD capacity quota and the like are not displayed in this screen, the selected pool is not a virtual capacity pool. Return to the Select the pool screen to select the correct pool. [Change] button: [Next] button: [Back] button: Changes can be made to items displayed in Detailed parameters for LD binding. If changes are needed, click this button to display the Change dialog and make changes. If no changes are needed, click the [Next] button. The Confirm LD binding parameters screen is displayed. If a logical disk name is being changed, a duplication check of the name is done at this stage. Returns to the screen preceding transition as follows: if [General usage] was selected for Select the LD usage, the Specify the number of LDs and LD capacity screen. if [Control Volume] was selected for Select the LD usage, the Specify the number of LDs Control Volume screen; if [System Volume] was selected for Select the LD usage, the Select the LD usage screen. 121

128 Chapter 5 Operations of the Thin Provisioning Function [Cancel] button: Displays an end query message before ending the wizard. Clicking the [Change] button in the Set detailed parameters for LD binding screen displays the Change dialog. Figure 5-41 Change Dialog OS Type/LD Name: The OS type and name can be set for the logical disks to bind concurrent with binding them. Logical disk names must be unique within a system (identical names must not be given). Therefore, when binding multiple logical disks, logical disk names in which numbers are appended to the specified character string in order are given automatically. The initial value in the logical disk name input field is 20 characters in which the 4 characters of the logical disk number are added to 16 characters native to the disk array. If the logical disk name is not changed, this initial value is set. Example) C5181F60005, C5181F60006, If the logical disk OS type is not changed, it will be blank. If the OS type is input blank, the initial values when shipped will be set, namely blank in OS type and disk array native 16 characters + 122

129 Chapter 5 Operations of the Thin Provisioning Function 4-character logical disk number in the logical disk name. Refer to (5)-2 Set detailed parameters for LD binding System Volume regarding OS type and name restrictions when binding a System Volume. Table 5-4 shows a list of logical disk OS types that can be selected. OS Type A2 A4 AX CX LX NX SX WN WG Table 5-4 OS Types Explanation Logical disk operated by ACOS-2 system Logical disk operated by ACOS-4 system (Consult maintenance personnel about setting this OS type) Logical disk operated by AIX system Logical disk operated by Solaris system Logical disk operated by Linux system Logical disk operated by HP-UX system Logical disk operated by SUPER-UX system Logical disk operated by Windows system Logical disk operated by Windows GPT system (1) A logical disk name that does not follow the rules shown below cannot be set. Number of characters used 1 to 24 Characters used Alphabetic A through Z (a through z) * Uppercase and lowercase characters are differentiated Numeric 0 through 9 Underscore _ Slash / * All characters must be one-byte characters. (2) If this specification is in error, the same logical disk name as when this specification is omitted is given. (3) In an ACOS-4 system, make this match the logical disk identifier on the host. For a partition user, there may be duplication errors with names of logical disks outside ism management. If so, consult a storage user. 123

130 Chapter 5 Operations of the Thin Provisioning Function Quotas and thresholds cannot be set for control volumes (CV) or System Volumes (SYV). LD Number: Available numbers are allocated starting from the specified LD number If omitted ( LD Number is invalid), the next number after the greatest number among the logical disk numbers being used is allocated. Example) Numbers allocated when existing logical disk numbers are 0, 1, 3, 4 are as follows. Omitted 5, 6, 7 0 specified 2, 5, 6 10 specified 10, 11, 12 The greatest numbers that can be specified are as follows. S4900: 1fffh D8 series: 0fffh Other than above: 03ffh Quota: Specify the quota of a virtual capacity disk as a proportion of the capacity (%). The quota is the greatest capacity that a virtual capacity logical disk can possess in order to prevent one virtual capacity logical disk from improperly allocating the actual capacity. There will be an error if a write from the host that exceeds this capacity occurs. Actual Pool capacity: This is the actual capacity of the pool. Set Capacity: This is the sum of the total capacity of quota capacities of LD in the pool and the total capacity of LD for which a quota was not set. If greater than the actual capacity, the pool could come to have insufficient capacity. Threshold: Specify the threshold of a virtual capacity disk as a proportion of the capacity (%). This is set for reporting to the user when an allocation greater than a certain capacity occurred, in order to prevent a write that exceeds the quota from occurring. The capacity of the LD capacity quota and the LD capacity threshold is rounded in 256 MB units. Therefore, if the capacity of the logical disk is smaller (less than 25 GB), the capacity of LD capacity quota or LD 124

131 Chapter 5 Operations of the Thin Provisioning Function capacity threshold may be the same even if the specified value (%) is different. Make an LD inaccessible when capacity shortage occurs: Specify the LD operation to perform in response to the capacity of a virtual capacity logical disk becoming insufficient (due to an actual capacity insufficiency or the quota being exceeded). If this check box is selected, the LD is inaccessible for reading and writing when there is insufficient capacity. If this check box is cleared, the LD remains accessible, and the area where data has already been written can be accessed even if there is insufficient capacity. This check box is selected or cleared according to the [OS Type] selected under [OS Type/LD Name]. If WN or WG is selected, the check box is automatically selected, and, if any other type is selected, the check box is cleared. When the logical disk format is WN or WG, the default value is Make an LD inaccessible. Change the response for the occurrence of insufficient capacity depending on the purpose. For the following purpose on Window OS, make an LD accessible. - Create an Oracle database by ASM - When creating an Oracle database in NFTS, disable the automatic expansion of the table area (that is, specify off to autoextend). For other cases, use the default value for operations. [OK] button: [Cancel] button: Returns to the Set detailed parameters for LD binding screen, in which the content that was set is displayed. Returns to the Set detailed parameters for LD binding screen. The content that was set is not reflected. 125

132 Chapter 5 Operations of the Thin Provisioning Function (5)-2 Setting detailed parameters for LD binding System Volume The Set detailed parameters for LD binding System Volume screen can be used to confirm or change the names and starting number of logical disks. Figure 5-42 Set Detail Parameter for LD Binding [Change] button: [Next] button: [Back] button: [Cancel] button: Changes can be made to items displayed in Detailed parameters for LD binding. If changes are needed, click this button to display the Change dialog and make changes. If no changes are needed, click the [Next] button. The Confirm LD binding parameters screen is displayed. If a logical disk name is being changed, a duplication check of the name is done at this stage. Returns to the Select the LD usage screen. Displays an end query message before ending the wizard. A System Volume has the following restrictions: An OS type cannot be attached. The initial value of the name is poolname_syv+ldnumber. The initial value of the logical disk number is the greatest number that can be used in the disk array, and it is recommended that this number be used. Quota and threshold cannot be set. 126

133 Chapter 5 Operations of the Thin Provisioning Function Clicking the [Change] button in the Set detailed parameters for LD binding screen displays the Change dialog. Refer to the Change dialog in (5)-1 Setting detailed parameters for LD binding regarding the Change dialog. 127

134 Chapter 5 Operations of the Thin Provisioning Function (6) Confirmation for LD binding parameters Clicking the [Next] button in the Set detailed parameters for LD binding screen displays the Confirm LD binding parameters screen. Figure 5-43 Confirm LD Binding Parameters [Next] button: [Back] button: [Cancel] button: An execution query message is displayed. Returns to the Set detailed parameters for LD binding screen. Displays an end query message before ending the wizard. Figure 5-44 LD Binding Query Message 128

135 Chapter 5 Operations of the Thin Provisioning Function (7) LD binding complete If logical disk binding succeeds, the following screen is displayed. Figure 5-45 LD Binding Complete [Finish] button: Ends the wizard. 129

136 Chapter 5 Operations of the Thin Provisioning Function If logical disk binding fails, the completion screen below is displayed. Figure 5-46 Message on Failure Logical disk binding may have failed due to communication abnormalities between the ism server and ism client, or due to problems of the disk array itself. If there were communication abnormalities, reconnect the ism client and check the status, since binding instructions may have been performed correctly. If there were errors on the disk array side, the cause of failure is recorded in the ism server operations log. If so, refer to ism server operations log and run again after taking appropriate measures. 130

137 Chapter 5 Operations of the Thin Provisioning Function Expandiing a Viirttuall Capaciitty Pooll Virtual capacity pool expansion can be performed from the LD Individual Bind/Unbind screen. Figure 5-47 LD Individual Bind/Unbind Screen Procedure for expanding a virtual pool capacity 1. In the tree view in the configuration display area, select [Dynamic Pool]. 2. In the detailed display area, select the pool to expand from the pool list. 3. Click the [Capacity Expansion] button. 4. The Pool Capacity Expansion dialog is displayed. For a virtual capacity pool, it is possible to just expand the capacity without adding physical disks. For a pool in which there is a fault (over capacity), if it is expanded by adding physical disks, the fault (over capacity) state is canceled because the actual capacity was expanded. However, since a fault (over capacity) state of a logical disk that occurred simultaneously in that pool is not cancelled, perform alarm cancellation as in Changing Responses upon checking the state. When adding physical disks, do so after confirming that the physical disks that make up the pool are normal. 131

138 Chapter 5 Operations of the Thin Provisioning Function A physical disk of a different PD type from the selected pool cannot be used in pool expansion. A physical disk that differs from the selected PD group cannot be used in pool expansion. Pools in the states below cannot be expanded. 1. Rotation is stopped. 2. Partition user Figure 5-48 Pool Capacity Expansion Dialog Pool Information Number: The pool number Name: The pool name RAID Type: The current RAID type Capacity: The pool capacity (Virtual capacity) Actual Capacity: Actual capacity of the pool Actual Used Capacity: The capacity that has been allocated in the pool Actual Capacity Threshold: The threshold This is displayed in proportion to the actual capacity (%) and as a capacity. Actual Capacity Threshold (pre): Advance notice of threshold This is displayed in proportion to the actual capacity (%) and as a capacity. If not set, it is displayed as

139 Chapter 5 Operations of the Thin Provisioning Function Node Number: Number of node to which the pool belongs PD Group Number: Number of PD group to which the pool belongs Partition Allocated *1: The allocation attribute of partition [Partition List] button *1: Displays the list of partitions allocated in pool screen (figure below). Figure 5-49 List of Partitions Allocated in Pool Screen *1: This is displayed only if the partitioning function is available. Expansion Method No Pool Rebuilding: Pool Rebuilding: Pool capacity can be expanded without affecting existing logical disks. At least six physical disks are required by a pool composed in a RAID6(4+PQ). At least ten physical disks are required by a pool composed in a RAID6(8+PQ). At least three physical disks are required by a pool composed in a RAID-TM. At least two physical disks are required by a pool composed in a RAID1. For a virtual capacity pool, this is the only specification that can be selected. Moreover, this must be the specification even when not adding physical disks. This cannot be selected for a virtual capacity pool. Virtual Capacity Pool Capacity: Specify the pool capacity after expansion. It is possible to specify just this value and not add physical disks. 133

140 Chapter 5 Operations of the Thin Provisioning Function Select PD for Expansion Unused PDs: Pool PDs: PDs to be added: List of unused disks List of disks that make up the pool after expansion The number of physical disks to add to the pool [Add] button: [Delete] button: Clicking this button after selecting a physical disk to use to expand pool capacity from the list of unused disks adds the selected physical disk to the list of pool constituent disks. To delete a physical disk to use to expand pool capacity, select the physical disk in question from the list of pool constituent disks and click this button. The selected physical disk is added to the list of unused disks. * A physical disk that is configured in the pool cannot be selected. Clicking the [OK] button displays a pool capacity expansion query message. Figure 5-50 Pool Capacity Expansion Query Message Pool Information Number: The pool number 134

141 Chapter 5 Operations of the Thin Provisioning Function Name: Before Expanding Capacity: After Expanding Capacity: Before Actual Capacity: After Actual Capacity: Pool Rebuilding: Expansion Time: The pool name The pool capacity before expansion The pool capacity after expansion The actual capacity before expansion The actual capacity after expansion The pool expansion method The expansion time for all physical disks Physical Disk Information Number of PDs Before Expansion: Number of physical disks making up the pool before expansion Selected PDs for Pool Binding: Number of physical disks by which to expand the pool Number of PDs After Expansion: Number of physical disks making up the pool after expansion Pool PDs: List of the physical disks that make up the pool after expansion [Yes] button: Performs pool capacity expansion. [No] button: Returns to the Pool Capacity Expansion dialog. A message is displayed if expansion by the number of physical disks selected is not possible: [25218] or [25227] Figure 5-51 Message Boxes 135

142 Chapter 5 Operations of the Thin Provisioning Function The message below is displayed if physical disks that are less than the minimum capacity for pool constituent disks were selected: [25292] Figure 5-52 Message Box The warning message below (continuable) is displayed if physical disks of different capacities or rotational speeds were selected. Confirm that there are no mistakes in the selected disks: [25293] Figure 5-53 Message Box For a disk array for which the disk drive transfer speed is displayed, the same warning message is displayed if multiple transfer speeds are mixed together ([25293]). Figure 5-54 Message Box 136

143 Chapter 5 Operations of the Thin Provisioning Function 5. The completion message below is displayed if expansion of pool capacity succeeds. Figure 5-55 Pool Capacity Expansion Completion Message The actual capacity after pool expansion is not automatically reflected. Confirm it by refreshing to the latest information. 137

144 Chapter 5 Operations of the Thin Provisioning Function Changiing a Viirttuall Capaciitty Pooll Thresholld Virtual capacity pool threshold change is done from the LD Individual Bind/Unbind screen. This operation is valid only for a virtual capacity pool. Figure 5-56 LD Individual Bind/Unbind Screen Procedure changing a virtual capacity pool threshold 1. In the tree view in the configuration display area, select [Dynamic Pool]. 2. Select the virtual capacity pool to be changed from the pool list in the detailed display area. 3. Click the [Change Actual Cap. Threshold] button. 4. The Change Actual Cap. Threshold dialog is displayed. 138

145 Chapter 5 Operations of the Thin Provisioning Function Figure 5-57 Capacity Actual Cap. Threshold Dialog [OK] button: [Cancel] button: The actual capacity threshold of the virtual capacity pool is changed. Closes the dialog without setting. A virtual capacity pool that is in the state below cannot be changed. 1. Rotation is stopped. Change it after this state is canceled. 5. The completion message below is displayed if actual capacity threshold change succeeds. Figure 5-58 Actual Capacity Threshold Change Completion Message 139

146 Chapter 5 Operations of the Thin Provisioning Function Changiing Viirttuall Capaciitty Logiicall Diisk Quotta and Thresholld Virtual capacity logical disk quota and threshold change is performed from the LD Individual Bind/Unbind screen. Figure 5-59 LD Individual Bind/Unbind Screen Procedure for unbinding a logical disk 1. In the tree view in the configuration display area, select [Dynamic Pool] and then a virtual capacity pool. 2. In the detailed display area, click the [Logical Disk] tab. 3. Select the logical disk to be changed from the list of constituent logical disks in the detailed display area. 4. Click the [Change Quota and Threshold] button. 5. The Change Quota and Threshold dialog is displayed. 140

147 Chapter 5 Operations of the Thin Provisioning Function Figure 5-60 Change Quota and Threshold Dialog [OK] button: [Cancel] button: The quota and threshold of the virtual capacity logical disk are changed. Closes the dialog without setting. Virtual capacity logical disks that are in the states below cannot be changed. 1. The snapshot attribute is set in a SV, LV, or SDV. 2. It is a control volume. 3. A work disk for optimization setting has been made (LD Administrator). 4. Logical disk configuration change is locked. 5. It is a System Volume. 6. Rotation is stopped. 7. For a partition user, according to the logical disk allocation mode, the logical disk is allocated to a partition. (Only the threshold can be changed) Make changes after these states are canceled. 141

148 Chapter 5 Operations of the Thin Provisioning Function The capacities of the LD capacity quota and the LD capacity threshold are rounded to the nearest 256 MB above. When the logical disk capacity is small (25 GB or less), the capacities of the actual used capacity, LD capacity quota, and LD capacity threshold might be the same if their percentage values are different. 6. The completion message below is displayed if quota and threshold change succeeds. Figure 5-61 Quota and Threshold Change Completion Message 142

149 Chapter 5 Operations of the Thin Provisioning Function Changiing Responses The LD response when the capacity of a virtual capacity logical disk becomes insufficient can be changed on the LD Individual Bind/Unbind screen. Figure 5-62 LD Individual Bind/Unbind Screen Procedure for changing the response 1. In the tree view in the configuration display area, select [Dynamic Pool] and then a virtual capacity pool. 2. In the detailed display area, click the [Logical Disk] tab. 3. Select the logical disk for which to change the response from the list of constituent logical disks in the detailed display area. 4. Click the [Change Response] button. 5. The Change Response dialog box is displayed. 143

150 Chapter 5 Operations of the Thin Provisioning Function Figure 5-63 Change Response Dialog Box When capacity shortage occurs Make an LD inaccessible: Specify the LD operation to perform in response to the capacity of a virtual capacity logical disk becoming insufficient (due to an actual capacity insufficiency or the quota being exceeded). If this check box is selected, the LD is inaccessible for reading and writing when there is insufficient capacity. If this check box is cleared, the LD remains accessible, and the area where data has already been written can be accessed even if there is insufficient capacity. [OK] button: Clicking this button changes the LD operation to perform in response to the capacity of a virtual capacity logical disk becoming insufficient. For the volume used on Windows (the logical disk format is WN or WG), the default is Make an LD inaccessible. It may be necessary to change this default value depending on the operation. For details, refer to the notes in Binding Virtual Capacity Logical Disks. Even if Make an LD inaccessible is specified, volume may seem to be accessible due to cache control in some Windows operating systems. Even in this case, access is not possible if the Delay writing failed message appears. Rebuild the volume following each procedure in 4.3 Events When Monitoring Capacity. 144

151 Chapter 5 Operations of the Thin Provisioning Function Cancelliing Allarms Cancellation of an alarm for a pool or logical disk that occurred due to insufficient capacity of the pool is performed from [Management Setting]. Figure 5-64 Configuration Setting Menu 145

152 Chapter 5 Operations of the Thin Provisioning Function Figure 5-65 Alarm Cancellation Procedure for canceling the alarm 1. Click the [Management Setting] button from the configuration setting menu to display the Management Setting dialog. 2. Select the [Thin Provisioning] tab. 3. Pools or logical disks for which alarms have arisen are displayed in a list. Select the pool or logical disk for which you wish to cancel an alarm. 4. Click the [Reset Pool alarm] button or the [Reset LD alarm] button. 5. An alarm cancellation confirmation dialog is displayed. Figure 5-66 Alarm Cancellation Confirmation Screen 6. The completion message below is displayed if alarm cancellation succeeds. 146

153 Chapter 5 Operations of the Thin Provisioning Function Figure 5-67 Alarm Cancellation Completion Screen By canceling an alarm, a fault (over capacity) state that arose in the pool or logical disk is canceled. However, without resolving the insufficient capacity of the pool, note that it could fall into a fault state again. To cancel an alarm (a fault(over quota) state) due to the excess of a logical disk capacity quota, configure the logical disk capacity quota again. 147

154 Chapter 5 Operations of the Thin Provisioning Function Quiick Biindiing off Viirttuall Capaciitty Logiicall Diisks You can perform quick binding of virtual capacity logical disks for D Series disk arrays other than D8. For details about quick binding, refer to the Configuration Setting Tool User s Manual (GUI). This section describes how to bind a virtual capacity pool and virtual capacity logical disk. Figure 5-68 New Pool Binding Screen To bind a new virtual pool, select a dynamic pool, and then select [Bind virtual capacity pool]. The pool capacity, capacity threshold, and capacity threshold (pre) have the following values after binding: Pool capacity: Maximum physical capacity of the disk array*1 Capacity threshold: 80% Capacity threshold (pre): Not specified *1: The maximum physical capacity is the capacity for a pool that consists of 192 physical disks. However, by specifying the allow_virtual_capacity_over_max_pd parameter in the environment settings, binding that exceeds this maximum can be performed, up to a capacity of 513 TB. 148

155 Chapter 5 Operations of the Thin Provisioning Function Figure 5-69 LD Binding (FC) Screen If a virtual capacity pool is newly bound or selected, a logical disk is bound as a virtual capacity logical disk. For this disk, the capacity, quota, capacity threshold, and LD response when the capacity becomes insufficient are as follows: Logical disk capacity: Up to 4 TB can be selected. Quota: Not specified Capacity threshold: Not specified LD response when the capacity becomes insufficient: For a Windows host, Make an LD inaccessible is specified, and, for other hosts, Make an LD inaccessible is specified. 149