Using IDS v10 on Linux Kernel 2.6

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1 M01 Using IDS v10 on Linux Kernel 2.6 Tips and Tricks Ajay Gupta IBM 08, May, :00 a.m. 11:30 a.m. New features have been implemented in the IBM Informix Dynamic Server v10 for Linux which exploit Linux Kernel 2.6 and improve performance of the database Server. Support for new Linux platforms have also been added in IDS v10. This session will provide information on how to exploit these new features in IDS v10 and discuss the new Linux platform support that has been added. IDS Linux strategy will also be discussed. 1

2 Agenda History of IDS on Linux Linux platforms supported currently by IDS Linux distributions supported currently by IDS Requirements for IDS v10 New Linux features in IDS v10 Combination of IDS v10 and Linux kernel 2.6 some benefits IDS v10 and Hyper-Threading Getting Linux system ready for IDS v10 Configuring a RAW device for IDS v10 Getting a trial version of IDS v10 IDS Linux web site Helpful Links Summary Q & A 2 2

3 2004 : IBM IDS bit on Itanium History of IDS on Linux 2005 : IBM IDS released on ALL IBM Linux HW 2003 : IBM IDS bit DB Engine on zseries 1999 : LINUX edition IBM IDS Full feature set support : LINUX edition IBM IDS Limited features. 4GL & I-SQL clients : First commercial Enterprise LINUX DB IBM IDS : IBM Informix ESQL/C & SE on LINUX 3 Lets visit the major milestones in our LINUX history that illustrate our support for LINUX the past several years. This also reiterates our LINUX support and strategy. 1998: IBM Informix acknowledged the importance of LINUX and first experimented with a client (ESQL/C) and SE backend and released its first commercial version Later that year we released 7.24 IDS online was the first commercial LINUX Database in the market 1999: In those days 7.30 was our bread & butter product and we released the engine and labeled it LINUX edition with limited features to support the notion that we had to release a product on LINUX for SMBs who had intense OLTP requirements without all the overhead of SMP. We added on 4GL and I-SQL to our LINUX portfolio. Later that year, owing to its popularity and customer demand with LINUX being treated in line with other mainstream UNIX operating systems, we released a full blown feature set version as long as LINUX OS was not limiting it. E.g.: KAIO was not supported 2003: From 1999 on, LINUX has been treated as any mainstream OS with all product releases became business as usual adding continuously new products to our portfolio Interesting FACT: By early 2001, prior to us being acquired by IBM, we had been experimenting and incidentally we had a working 32 Bit version of IDS on LINUX 390 [zseries] exactly on the day we were acquired by IBM proving our common LINUX vision. This was the first lab version of this family and finally in 2003 we rolled out the 64 Bit 9.4 Engine on zseries. This is the first time IDS is running on a mainframe!! We will talk about this later on in the presentation. 2004: This is a great year. This is the first time we will support all IBM hardware platforms which support LINUX. IA 64 release 3

4 Linux Platforms supported currently by IDS Platform IDS 10.0 IDS 9.4 IDS 7.31 Linux x86 (32-Bit) Linux zseries (64-Bit) Linux Itanium (64-Bit) Linux on POWER (64-Bit) Linux x86_64 (EM64T/AMD64) (32-Bit) Linux x86_64 (EM64T/AMD64) (64-Bit) 4 4

5 Linux distributions supported currently by IDS Platform IDS 10.0 IDS 9.4 IDS 7.31 Linux x86 (32-Bit) RHEL 3, RHEL 4, SUSE SLES 9, RFAS 4.1 Kernel/glibc 2.4.7/2.2.4, RHEL 3, RHEL 4, SUSE SLES 9, RFAS 4.1 Kernel/glibc /2.1.2, RHEL 3, RHEL 4, SUSE SLES 8, SUSE SLES 9, Linux zseries (64-Bit) RHEL 3, RHEL 4, SUSE SLES 9 SUSE SLES 8/UL 1.0, RHEL 3, RHEL 4, SUSE SLES 9 Linux Itanium (64-Bit) RHEL 3, RHEL 4, SUSE SLES 9 SUSE SLES 8/UL 1.0, RHEL 3, 5 5

6 Linux distributions supported currently by IDS (continued) Platform IDS 10.0 IDS 9.4 IDS 7.31 Linux on POWER (64-Bit) RHEL 3, RHEL 4, SUSE SLES 9 Linux x86_64 (EM64T/AMD64) (32 & 64-Bit) RHEL 3, RHEL 4, SUSE SLES 9 6 6

7 Requirements for IDS v10 Intel i686 compatible CPU (minimum Pentium II / Pentium Pro or AMD Athlon) The following packages should be installed on RHEL 4 compat-gcc ,compat-libstdc , glibc-devel-2.3.4, libaio , libgcc , libstdc , ncurses-5.4, openmotif-2.2.3, pam-0.77 Refer to Machine Notes for requirements on other distributions 7 7

8 New Linux features in IDS v10: KAIO Kernel Asynchronous I/O (AIO) allows applications to overlap processing with I/O operations for improved CPU and device utilization libaio.so library is required and dynamically loaded on demand is enabled by default on RAW Devices 8 X86 needs i686 compatible processors 8

9 New Linux features in IDS v10: DIRECT I/O A read/write on a RAW device opened with the O_DIRECT flag causes data to be transferred directly between the user buffer and the disk No overhead of making an extra copy of the buffer from the disk to file system cache Direct I/O is turned ON when RAW device and Linux kernel version 2.6.x. is detected Results in performance benefit 9 X86 needs i686 compatible processors 9

10 New Linux features in IDS v10: Processor affinity Processor affinity refers to binding a process or a set of processes to a specific CPU or a set of CPUs. Override the system s built-in scheduler to force a process to only run on specified CPUs. This can provide some performance gains in SMP and NUMA environments 10 X86 needs i686 compatible processors 10

11 New Linux features in IDS v10: IPC with stream pipe Implemented using Unix Domain Sockets Function calls used: bind, socket, send, etc Faster than local loop back Local 32-bit applications/tools can connect to the 64-bit server using the IPC stream pipe protocols New alternative to SHM and SOCTCP 11 X86 needs i686 compatible processors 11

12 New Linux features in IDS v10: Support for SNMP agent Support for SNMP agent on Linux introduced in IDS UC1 based on customer request Supported on x86 only SNMP agent is based on PEER Network s Subagent development kit OnSNMP is the subagent for IDS Refer to IBM Informix SNMP Subagent Guide for more information 12 X86 needs i686 compatible processors 12

13 CPU Scaling [2GB workload fully cached 10WH] 13 13

14 Large Scale Linux Solution Test Center IBM Informix database (64-bit) on IBM zseries "The workload scales perfectly from 1 to 16 CPUs, demonstrating that the Informix database, and the zseries hardware are very well suited for CPU scaling... See: uning_res_scaling.shtml 14 14

15 Test environment LPAR Linux SUSE SLES9 64bit Informix database server 2x FCP GbE 2x FCP x440 users 2x FAStT 600 turbo OLTP Database 15 15

16 Linux 2.6 Disk I/O Options - Results normalized throughput 1,6 1,4 1,2 1,0 0,8 0,6 0,4 0,2 0,0 Informix single server, I/O options, Linux 2.6 file system, 2.4 file system raw device raw device KAIO raw, KAIO, +Shared memory the combination of Raw device & KAIO is a very good improvement Further enhancements: The AIO VPs of the database are not longer needed. The additional free memory can be used to increase the database buffer 16 16

17 Linux 2.6 I/O Scheduler - Results 1,0 Inform ix single server, I/O scheduler normalized throughput 0,8 0,6 0,4 0,2 0,0 as noop cfq deadline 2.4 as scheduler is not a good choice for this environment all other schedulers comparable to 2.4 scheduling Deadline scheduler is used for further tests 17 17

18 IDS v10 and Hyper-Threading The objective of the benchmark is to analyze the impact of Intel HTT on IDS v10 The performance on the system with Hyper-Threading enabled and disabled shall be compared TPC/B workload used All taken from the customer reference database and can be referenced (all from 2004 and 2003!!) 18

19 IDS v10 and Hyper-Threading (continued) CPU VPs with HTT 3CPU VPs without HTT Hyper-Threading shows the highest performance improvement with 60 clients. The HTT system performs 20.97% better. After ONCONFIG tuning All taken from the customer reference database and can be referenced (all from 2004 and 2003!!) 19

20 IDS v10 and Hyper-Threading (continued) CPU VPs with HTT 2 CPU VPs without HTT With 2 CPU VPs, IDS does not take advantage of HTT. The average performance improvement is 1.50%. 20 All taken from the customer reference database and can be referenced (all from 2004 and 2003!!) 20

21 IDS v10 and Hyper-Threading (continued) The system configuration tested on: IBM xseries 345 type X Two Intel Xeon 2.66 GHz processors with Hyper-Threading support SUSE SLES 9 SP1 (kernel ) with SMP support 4GB RAM IDS UC

22 Getting a RHEL 4 Linux system ready for IDS v10 Configuration of the system used in the example: Pentium III 600MHz, 512MB RAM, 2 x 15.3 GB disks (Maxtor 51536U3 ATA) One disk was used to install Linux O/S and the other was used for providing space for IDS databases. O/S Version - Red Hat Enterprise Linux AS release 4 (nahant) 22 22

23 Getting a RHEL 4 Linux system ready for IDS v10 (continued) During installation, the default settings should be preferred, some hints and exceptions are listed below: boot the PC from the first of the 4 CDs in step "Language Selection" choose "English" in step "Keyboard Configuration" choose the layout for your keyboard in step "Upgrade Examine" select "Install Red Hat Enterprise" to freshly install in step "Automatic Partitioning" select /dev/hda only (deselect /dev/hdb) in step "Package Installation Defaults" select "Customize software packages..." in step "Package Group Selection" in chapter "Applications" select "Graphical Internet" (get Firefox browser) in chapter "Development" select "Legacy Software Development" (get packages for compatibility to older Red Hat versions) reboot after the installation is completed 23 23

24 Getting a RHEL 4 Linux system ready for IDS v10 (continued) login as user root and open a terminal (Applications -> System Tools -> Terminal) for IDS graphical tools install OpenMotif runtime from CD#3: put CD#3 in the drive, it should be automatically mounted to install the package, type the following command in the terminal: rpm -Uvh /media/cdrom/redhat/rpms/openmotif rhel4.2.i386.rpm to eject the CD from the drive type the command: eject to access IDS raw devices with Kernel Asynchronous Input Output (KAIO), install libaio from CD#3: put CD#3 in the drive, it should be automatically mounted to install the package, type the following command in the terminal: rpm -Uvh /media/cdrom/redhat/rpms/libaio i386.rpm to eject the CD from the drive type the command: eject 24 24

25 Getting a RHEL 4 Linux system ready for IDS v10 (continued) For detailed instructions, refer: Red Hat Enterprise Linux Documentation page in the Document Red Hat Enterprise Linux Installation Guide for the x86, Itanium, and AMD64 Architectures 25 25

26 Getting a SUSE SLES 9 Linux system ready for IDS v10 During installation, the default settings should be preferred, some hints and exceptions are listed below: boot the PC from the first of the 4 binary CDs in step "Select your language" choose "English (US)" in step "Installation Settings" click on "Keyboard layout" and choose appropriate layout click on "Partitioning" and check swap and root partitions are created in /dev/hda choose "Base partition setup on this proposal" choose root partition (should be /dev/hda2) and change its file system type to ext3 using "Edit" menu click on "Time Zone" and choose appropriate time zone Accept installation settings and confirm start of installation reboot after the installation is completed login and open a terminal 26 26

27 Getting a SUSE SLES 9 Linux system ready for IDS v10 (continued) For detailed instructions, refer: SUSE Linux Documentation page in the Document SUSE LINUX Enterprise Server 9 Administration and Installation (PDF)

28 Configuring a RAW device for IDS v10 The whole second disk of the system in the example can be configured as a raw device Please note that all data will be lost on this disk First step is to create a partition using the interactive console utility fdisk As user root, run the following command: fdisk /dev/hdb The following message will be displayed 28 28

29 Configuring a RAW device for IDS v10 (continued) The number of cylinders for this disk is set to There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) Command (m for help): m Command action a toggle a bootable flag b edit bsd disklabel c toggle the dos compatibility flag d delete a partition l list known partition types m print this menu n add a new partition o create a new empty DOS partition table 29 29

30 Configuring a RAW device for IDS v10 (continued) Command action (continued) p print the partition table q quit without saving changes s create a new empty Sun disklabel t change a partition's system id u change display/entry units v verify the partition table w write table to disk and exit x extra functionality (experts only) Command (m for help): o Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable

31 Configuring a RAW device for IDS v10 (continued) The number of cylinders for this disk is set to There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n Command action e extended p primary partition (1-4): p 31 31

32 Configuring a RAW device for IDS v10 (continued) Partition number (1-4): 1 First cylinder ( , default 1): Using default value 1 Last cylinder or +size or +sizem or +sizek ( , default 29651): Using default value Command (m for help): p Disk /dev/hdb: 15.3 GB, bytes 16 heads, 63 sectors/track, cylinders Units = cylinders of 1008 * 512 = bytes Device Boot Start End Blocks Id System /dev/hdb Linux 32 32

33 Configuring a RAW device for IDS v10 (continued) Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks Once the partition /dev/hdb1 is created its permissions must be changed for use by IDS: chown informix:informix /dev/hdb1 chmod 660 /dev/hdb1 Note the change of permissions may be required again after reboot of the machine. This can be done using an init script

34 Getting a trial version of IDS v10 Trial version of IDS version v10 can be downloaded from: ibm.com/software/data/informix/downloads.html Click on Informix Dynamic Server Enterprise Edition v10.0 Trials Click on Linux A Registered ID with IBM and Password is required for sign in Choose download using http 34 34

35 IDS Linux web site

36 IDS Linux web site (continued) 36 36

37 Helpful Links Informix Instant Answers - ibmifmx@us.ibm.com Sametime: IBMIFMX Informix Product Page - Informix Platform Roadmap - Informix Product Life Cycle (PLC) Roadmap - Informix International User Group (IIUG) - DM Today Newsletter ibm.com/software/data/db2infonews/ 37 37

38 Summary IDS v10 offers Linux support on x86, x86_64 (Intel EM64T/AMD64), POWER, zseries and Itanium platforms IDS v10 supports new features that exploit Linux Kernel 2.6 and provides many benefits IDS v10 and Linux Kernel 2.6 combination makes a great platform choice 38 38

39 Q & A 39 X86 needs i686 compatible processors 39

40 THANK YOU!! 40 X86 needs i686 compatible processors 40

41 Session M01 Using IDS v10 on Linux Kernel 2.6 Tips and Tricks Ajay Gupta IBM 41 41

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