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RAC , Grid, Cloud or on the way to Oracle Cloud 11GR2 RAC features review

RAC , Grid, Cloud or on the way to Oracle Cloud 11GR2 RAC features review. By: Ahmed Baraka ( Independent ) Yury Velikanov (Pythian) & All of you. RAC, Grid, Cloud. It isn’t just Real Applications Cluster anymore ... Clusterware Administration and Deployment Guide

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RAC , Grid, Cloud or on the way to Oracle Cloud 11GR2 RAC features review

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  1. RAC, Grid, Cloudor on the way to Oracle Cloud11GR2 RAC features review By: Ahmed Baraka (Independent) Yury Velikanov(Pythian) & All of you

  2. RAC, Grid, Cloud ... • It isn’t just Real Applications Cluster anymore ... • Clusterware Administration and Deployment Guide • ASM file system and volume manager • Storage Administrator's Guide • SCAN, GNS, DHCP, DNS, • Grid Infrastructure • One node RAC 

  3. Oracle 11g R2 RAC Features Review

  4. The speaker Ahmed Baraka • 8 years working with Oracle (DBA and Developer) • OCP in Oracle DBA 9i, 10g and 11g • www.ahmedbaraka.com

  5. Main Changes in Oracle 11g R2 RAC • Oracle RAC One Node • Grid Plug and Play • ASM Cluster File System (ACFS) • Grid Naming Service (GNS) • Changes on Oracle 11g R2 RAC Installation

  6. Oracle RAC One Node Server A Server B Server C DB1 DB2 DB3 DB4 DB5 shared storage A single instance database offering better availability than a standalone single instance database.

  7. Always on single-instance database Server A Server B Server C DB1 DB2 DB2 DB3 DB4 DB5 shared storage Oracle RAC One Node combines Omotion, shared storage, and a clustered infrastructure to provide powerful availability features.

  8. Always on single-instance database • Omotion enables customers to online migrate from one generation of servers to another—no downtime required • Online maintenance for both database and OS • Enhanced Protection from Failures: cold failover (5 to 30 minutes) • Better Server Consolidation • White Paper: Oracle Real Application Clusters One Node

  9. Grid Plug and Play • Reduce cost of adding and removing nodes • Powered by GNS • DBCA, NETCA, OME and SRVCTL have been updated to support Grid Plug and Play srvctl add instance

  10. ASM Cluster File System (ACFS) • General purpose files, such as Oracle binaries, can now be saved on Oracle ASM volumes • 64-bit file system data structure • NFS and CIFS compatible • Journaling file system

  11. Grid Naming Service (GNS) • Enables using DHCP, which must be configured in the subdomain in which the cluster resides. • Proivdes self-management of the network requirements for the cluster. • Adds complexity to RAC architecture

  12. Changes on Oracle 11g R2 RAC Installation • Oracle Grid Infrastructure: includes ASM (Clusterware and ASM Homes) • OCR and Voting on ASM storage: not supported in 11g Release 1. • Automatic SSH Connectivity • Hangchecktimer Not Needed

  13. Oracle 11g R2 RAC Installation Plan • Oracle Grid Infrastructure Install • Grid Infrastructure Home Patching • RDBMS Software Install • RAC Home Patching • Run ASMCA to create diskgroups • Run DBCA to create the database

  14. Oracle 11g R2 RAC Sample With No GNS or IPMI

  15. Single Client Access Name (SCAN) • SCAN is a domain name used by all clients connecting to the cluster. • Registered to three IP addresses in DNS or GNS

  16. Automatic SSH Connectivity

  17. OCR and Voting on ASM storage • OCR and Voting can now be configured on an ASM diskgroup. • Supports up to five copies of OCR

  18. Fixup Scripts • For an incomplete task that is marked "fixable", fixup script can be generated.

  19. Hangchecktimer Not Needed • Replaced by the cluster synchronization service daemon Agent and Monitor to provide more accurate recognition of hangs and to avoid false termination.

  20. Supporting IPMI • Supporting Intelligent Platform Management Interface (IPMI) is an industry standard management protocol that is included with many servers today. • Operates independently of the OS. • Uses baseboard management controller (BMC) to communicate to the server. • Clusterware uses it when node fencing is required and the server it not responding.

  21. Summary • Oracle 11g Release 2 Changes: • Oracle RAC One Node • ASM Cluster File System (ACFS) • Grid Naming Service (GNS) • SCAN • Automatic SSH Connectivity • Fixup Scripts • OCR and Voting on ASM Storage • Hangchecktimer Not Needed • Supporting IPMI

  22. Hands On Session ...

  23. Hands on ...

  24. Tools • Cluster Verification Utility (CVU): cluvfy • Server Control (SRVCTL) • Oracle Clusterware Control (CRSCTL) • Oracle Interface Configuration Tool (OIFCFG) • Oracle Cluster Registry Configuration Tool (OCRCONFIG) • You can also use the OCRCHECK and OCRDUMP utilities to troubleshoot configuration problems that affect OCR.

  25. # ps -ef | grep gns • root 26790 1 2 14:41 ? 00:00:00 /u01/app/11.2.0/grid/bin/gnsd.bin -trace-level 0 -ip-address 10.10.193.201 -startup-endpoint ipc://GNS_hostrac01_23867_408c49e351f1f6a8 • root 26825 17210 0 14:41 pts/1 00:00:00 grep gns • Unfortunately there is no description as of now in the documentation or MOS on how to change it to generate invaluable diagnostic information. • NOTE: I am sure the documentation will be updated in Database 12c version (c for Cloud ;) • For a time being the following should work for you: • # /u01/app/11.2.0/grid/bin/crsctl modify resource ora.gns -attr "TRACE_LEVEL=6" • # /u01/app/11.2.0/grid/bin/srvctl stop gns • # /u01/app/11.2.0/grid/bin/srvctl start gns

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