Oracle Storage Options

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1 1/27 Oracle Storage Options RAW, ASM, CFS, for Real Application Cluster Unterföhring, M. Kühn 1

2 2/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW In short ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice 2

3 3/27 Be spoilt for Choice: RAC Review Physical Structure: Two or more nodes Interconnect DB Files on shared storage Public network (VIP) Software: clusterware Vendor and/or CRS database shared storage management: RAID VM (Volume Manager) Inst1 Disk Inst1 Inst2 Inst3 FC Switch Mirror Inst2 FC Switch Disk Mirror

4 4/27 Be spoilt for choice: Introduction Abbrev. Raw ASM CFS OCFS Storage option Raw devices, no file system Automatic Storage Management Vendor Cluster file system Oracle Cluster file system Network file system (certified NAS device)

5 5/27 Be spoilt for choice: Introduction Types of database files FS, CFS, Database SW Dump files RAW, CFS, RAW,, CFS, ASM Data files SPFILE Control files RedoLog files FS, CFS,, ASM CRS files Voting Disk OCR Recovery Area RMAN Archived Logs

6 6/27 Be spoilt for Choice: Introduction Not all files have to be on a shared storage subsystem Each node can have its own ORACLE_HOME All data files and CRS files must be on shared storage Flash Recovery Area must be shared by all instances No platform is supported for all storage options

7 7/27 Be spoilt for choice: Introduction Storage option Raw ASM Certified CFS OCFS OCFS2 Platforms and file types support Platforms All platforms All platforms AIX GPFS, True64 CFS, RedHat GFS, Solaris QFS Linux, Windows Linux Supported file types Data files, CRS Data files Recovery All Data files, CRS, Recovery All beta, not certified NOT supported file types SW, Dump, Recovery CRS, SW, Dump None SW, Dump None Linux, Solaris All None

8 8/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW devices In short ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice

9 9/27 Raw devices: in short Advantage: Fast Performance All platforms Disadvantage: Mangeability Resize tablespaces full recovery Flash Recovery Area Auto extend or Oracle managed files

10 10/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW devices ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice

11 11/27 ASM: Automatic Storage Mangement ASM Concept Node1 CSS Node2 CSS +ASM metadata RAC11 +ASM metadata RAC12 Metadata Data files Recovery 1 Metadata Metadata Data files Data files Recovery Recovery 2 3

12 12/27 ASM: Automatic Storage Mangement ASM like logical volume manager Configured via SQL ASM instance has no data files Reads metadata config from disks export ORACLE_SID=+ASM sqlplus /nolog SQL> connect / as sysdba SQL> connected. SQL> create diskgroup mydg normal redundancy 2 failgroup mygrp1 disk 3 '/dev/rdsk/c3t0d0s0', 4 '/dev/rdsk/c3t0d1s0', 5 '/dev/rdsk/c3t0d2s0' 6 failgroup mygrp2 disk 7 '/dev/rdsk/c4t0d0s0', 8 '/dev/rdsk/c4t0d1s0', 9 '/dev/rdsk/c4t0d2s0';

13 ASM: Automatic Storage Mangement 13/27 Command line utility in Oracle 10g R2 export ORACLE_SID=+ASM asmcmd ASMCMD>? commands: cd du find help ls lsct lsdg mkalias mkdir pwd rm rmalias

14 ASM: Automatic Storage Mangement 14/27 ASMCMD> lsct DB_Name Status Software_Version Compatible_version Instance_Name +ASM CONNECTED ASM peter CONNECTED peter ASMCMD> cd /MyDG/PETER/ ASMCMD> ls CONTROLFILE/ DATAFILE/ ONLINELOG/ PARAMETERFILE/ TEMPFILE/ spfilepeter.ora ASMCMD> cd DATAFILE SMCMD> ls -l Type Redund Striped Time Sys Name DATAFILE MIRROR COARSE NOV 17 12:00:00 Y EXAMPLE DATAFILE MIRROR COARSE NOV 17 12:00:00 Y SYSAUX DATAFILE MIRROR COARSE NOV 17 12:00:00 Y SYSTEM DATAFILE MIRROR COARSE NOV 17 12:00:00 Y UNDOTBS DATAFILE MIRROR COARSE NOV 17 12:00:00 Y USERS ASMCMD> du Used_MB Mirror_used_MB ASMCMD> exit

15 15/27 ASM: Automatic Storage Mangement Advantage: Benefits of LVM Ease of management of raw devices Automatic I/O tuning for all type of workloads RAW disk I/O performance Online storage migration Disadvantage ASM files only be managed through oracle sql No use of unix file system tools (cp, ls,..) No use of third-party backup software No CRS files ASM instance dependency

16 16/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW devices ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice

17 17/27 CFS: OCFS, QFS, GPFS, GFS OCFS Oracle Cluster File System (OCFS2 beta, not certified) QFS Sun Quick File System GPFS IBM Global Public File System GFS RedHat Global File System

18 18/27 CFS: OCFS, QFS, GPFS, GFS One location Instance RAC11 Instance RAC12 OCFS File Types Data Files CRS Recovery RAID5 or 1+0 OCFS or CFS CFS File Types All

19 19/27 CFS: OCFS, QFS, GPFS, GFS Location 1 Location 2 Sun Cluster Instance RAC11 Sun Cluster Instance RAC12 RAID or JBOD QFS All file types RAID or JBOD QFS All file types

20 20/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW devices ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice

21 21/27 : Certified NAS Storage Instance RAC11 Instance RAC12 Ethernet - NAS Cluster NAS Cluster All file types All file types

22 22/27 : Certified NAS Storage System consumption 92 Advantage: Ease of use all file types Relatively low cost (if no NAS cluster) FS Disadvantage: Performance Need more CPU Resource ca. +20% OLTP workload ca % slower Only for Linux and Solaris OLTP Performance Solaris 10 new TCP/IP Stack and v4 compensate the disadvantages sparsely. 0 FS

23 23/27 : Certified NAS Storage Vendor List: RAC certified: EMC: Celerra Netapp: Filer Sun: NAS 5x10 Non RAC Auspex: NS3000XR BlueArc: Titan Silicon Server HP: ProLiant Storage Server NEC: Storage NV Series Pillar Data Systems: Axiom 500 Procom Technology: NetFORCE Veritas: ServPoint

24 24/27 Be spoilt for choice? RAC Review Introduction Storage Options RAW devices ASM Automatic Storage Management CFS Options OCFS[2], QFS, GxFS,.. Certified NAS Storage Konfiguration best Practice

25 25/27 Best practice: Overview HA certified Cluster QFS Sun Cluster ASM certified OCFS CFS RAW Perf.

26 26/27 Best practice: Flash Recovery Area with SAM-QFS Automatic storage archiving of Oracle Flash Recovery Area Instance RAC11 Instance RAC12 Tape Library archiving data staging data RAID5 or 1+0 SAM-QFS Recovery Area

27 27/27 Questions?

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