Virtualisation, tiered storage, space management How does it all fit together?

Transcription

1 Virtualisation, tiered storage, space management How does it all fit together? Dr Axel Koester Senior Consultant, Enterprise Storage Luxembourg Storage Seminar,

2 50 Years of Disk Storage: 1956 First Disk System RAMAC: Random Access Method for Accounting and Control IBM System RAMAC 305 Disk Storage 5 MB, US$ 2

3 RAMAC Storage: For Accounting and Control only! Capacity Number of Disks Diameter Tracks/disk-surface Recording density Access time RAMAC capacity compared 5MB = 5MB = 5MB = 5MB = 5MB ("Mega-Characters") 50 61cm 100, with 500 8bit-characters Max. 100 bits/inch, min. 55 bits/inch Average 500ms, max. 750ms 60K 80-column punched cards 2000 ft. tape (200 char/ ) 940 pages single-spaced Magnetic Drum 13 diam,42 ft. 3

4 33 Years of tiered Storage: Speed versus Capacity IBM 3420 Tape IBM 3850 Mass Storage System (1974) 1970 IBM Billion Characters IBM 3850 Cartridges (19,5m) with Staging-Disk IBM

5 Information Management Software since ~20 years Data Facility Systems Managed Storage (DFSMS) since 1988 Tivoli Storage Manager (TSM / ADSM) since 1993 Content management & discovery software ContentMgr, Commonstore, Filenet, Productivity Center, 5

6 The Landscape Today Virtualisation Server Virtualisation SAN Virtualisation - SVC File Virtualisation - GPFS Tape Virtualisation Space Management Tivoli Storage Manager HSM Space Manager Productivity Center DFSMS FC / SATA / Tape Tivoli Storage Manager Policy-based Migration Tiered Storage 6

7 Goals of Virtualization Server Virtualization: Efficient usage of resources Less hardware / floorspace Still: Administrative effort per partition/os System Z9 ~95% System P5 Storage Virtualization: Efficient usage of resources (Somewhat) less hardware Reduce admin effort: Manage pools, not racks 7

8 Goals of Tiered Storage 1. Provide storage at the appropriate cost level per application 2. Provide recovery capabilities as required per application Enablers for tiered storage: Online application migration capabilities (SVC) Pool management Resource usage monitoring (TPC) 8

9 Goals of Space Management 1. Minimize highest storage tier costs 2. Automate placement of application data, reduce admin effort 3. Optimize application restore capabilities Enablers for space management: Policy-based automation (HSM, FS) Transparent resource usage (TPC) 9

10 Space Management 10

11 Space Management with Tivoli HSM For Windows, Unix, or Linux Inactive data is transparently migrated by process rules, while remaining accessible 11

12 Tivoli Hierarchical Storage Management 85% fill grade: Delete 50% fill grade: Pre-migrate Migration rule(s) for inactive data Recall rules & quotas TSM Repository» Disk cache Tape 12

13 Fast Application Restore with Tivoli HSM Logical disk size unchanged but physical disk size reduced to size of one disk cluster After a disaster, only 4kB have to be restored to make this application startable 13

14 Elements required with Tivoli HSM TSM server (the one used for standard backup/restore/archive) TSM client software ( " ) Enable client-side HSM Migrate TSM Client HSM Recall TSM Server 14

15 Resource Management 15

16 Administrator's Swiss Army Knife One application for: Data and storage management (cross-vendor) Performance statistics Analysis, reporting, quota violations Prediction Avoiding out-of-space conditions (e.g. trigger provisioning) Error detection & correlation Topology browsing Chargeback/billing 16

17 TotalStorage Productivity Center TPC Storage Resource Management Tool Relates the application view with the system view on data Applikation? User? Share? LUN? WWN? Path? Container? Correlation Engine Storage Esperanto: SMI-S / GS3 17

18 TotalStorage Productivity Center TPC IBM TotalStorage Productivity Center Standard Edition Productivity Center For Data Productivity Center For Fabric Productivity Center For Disk Productivity Center For Replication Limited Edition (limit = 2TB) Limited Edition ships for free with every IBM storage Elements can be ordered separately 18

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21 Resource Virtualisation 21

22 Block-based Storage Virtualisation Benefits: Homogeneous administration Migrate while online Increased storage fill grade Balanced performance Isolate non-interoperable systems Less specialized staff required Heterogeneous distant replication Substantial software licenses economies SAN SAN Volume Controller 22

23 Why did we chose in-band Storage Virtualisation? In-band Appliance Array Based Intelligent Switch Host Zone Host Zone Host Zone Storage Zone Storage Zone Storage Zone Fast Path Intelligent Blades Control Path MetaData SAN Volume Controller HDS TagmaStore EMC Invista 23

24 Why did we chose in-band Storage Virtualisation? In-band Appliance Array Based Intelligent Switch Host Zone Storage Zone No storage pool concept. No striping Host Zone Image-mode mode pass through access only. Storage Zone Virtualisation as migration tool No caching concept. Relies on subsystem functions for Replication etc Expensive switch hardware Storage Zone Host Zone Fast Path Intelligent Blades Performance? SPC benchmark? Control Path MetaData SAN Volume Controller HDS TagmaStore EMC Invista 24

25 SAN Volume Controller: #1 in official SPC benchmarks SPC = official benchmark for storage, compare to "TPC" for servers SPC-1 measures random access performance in database environments whereas SPC-2 measures sequential throughput SPC-2 focuses on file serving in a real-word environment Not the ideal 100%-cache-hit peak number Benefits of read prefetch mechanism Benefits of sequential IO detection All numbers circa +20% for current SVC 4.1 To-be-announced SVC 4.2 is expected to exceed 6000 MB/s in SPC-2 benchmark. 25

26 File Virtualisation 26

27 IBM Storage Tank Technology Goal: Let the system assign resources (DFSMS-like) 1. Define classes of IT projects with policies & rules 2. Associate new projects with a class of policies 3. See how everything finds its most-suitable place by itself, over time, without human interaction 27

28 IBM Storage Tank Technology Examples of policy-driven data placement: Storage Tank Policies Storage Pool Storage Pool Storage Pool ❶ Place new files on fast reliable storage, migrate as they age ❷ Place temp files on nonmirrored non-backed storage ❸ Keep related files together 28

29 IBM Storage Tank Technology now in GPFS Policy driven data movement between all storage classes including full box migration. 2. Single point management across all storage classes including snapshot. 3. Isolation of storage configuration and effective application used storage. 4. Scalability from ThinkPad to BlueGene. 5. SAP certified with DB2 and Oracle Databases. GPFS Policies GPFS 2.x: thousands of satisfied customers worldwide 29

30 How they fit together: Virtualisation Server Virtualisation SAN Virtualisation - SVC File Virtualisation - GPFS Tape Virtualisation Space Management Tivoli Storage Manager HSM Space Manager Productivity Center DFSMS FC / SATA / Tape Tivoli Storage Manager Policy-based Migration Tiered Storage 30

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