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Oracle RAC Tips

Creating the Cluster

Oracle provides cluster software (or OSD – operating system dependent layer) to the windows cluster for the use of RAC. This is different from the Microsoft Cluster Service software that Microsoft provides for windows clustering. The Microsoft MSC deals with the failover type of clustering.

Installing the Oracle OSD Software

The Oracle cluster setup wizard installs and starts the Oracle9i operating system-dependent clusterware required for Real Application Clusters databases. Depending on the type of storage volumes used, there are two approaches: 1) Installation of OSD where shared storage volumes are located on raw partitions, and 2) Installation of OSD where shared storage volumes are mounted with OCFS.

OSD for Logical Partitions Configurations

  1. Navigate to the Disk1\preinstall_rac\clustersetup directory on the Oracle9i Server Installation CD.

  2. Launch the Oracle cluster setup wizard by double-clicking on clustersetup.exe. Then choose Next on the ‘welcome page’.

  3. The first time the wizard is run, the only option will be to create a cluster. Choose Next.

  4. The Disk Configuration screen appears. Click on the Create Oracle Symbolic Links button.

  5. The Oracle Object Link Manager window appears:

  6. From the Symbolic Link column, select an empty row. The cursor starts blinking.

  7. Enter the desired data file link name and hit Enter to save.

  8. Repeat the above two steps to assign all symbolic link names

  9. Click on the Apply button to commit the changes.

  10. When the progress bar at the bottom of the screen stops moving, choose Close.

  11. From the Disk Configuration screen, assign a voting disk, labeled srvcfg, by highlighting the corresponding row. Choose Next.

  12. The VIA Detection screen appears, stating whether Virtual Interface Architecture (VIA) hardware was detected. Choose yes or no depending on the configuration. Please contact the cluster hardware vendor if you are unsure. Click Next.

  13. The Network Selection screen appears. Choose use private network for interconnect. Click Next.

  14. The Network Configuration screen appears. Enter the public hostnames for all nodes. The private hostnames will be automatically entered as public_name.san. Accept the default or change as appropriate for the cluster configuration. Click Next.

  15. The Install Location screen appears. It will default to the WIN_HOME\system32\osd9i directory. Accept the default and click Finish.

  16. The Cluster Setup window will appear. This will show the progress in installing the cluster files and creating the cluster services on all nodes. If no errors occur, the Oracle Cluster Setup Wizard application will complete and close automatically.

OSD for OCFS Configuration

  1. Navigate to the Disk1\preinstall_rac\clustersetup directory on the OCFS distribution media.

  2. Launch the Oracle Cluster Setup Wizard by double-clicking on clustersetup.exe. Then choose Next on the Welcome page.

  3. The first time the Wizard is run, the only option will be to create a cluster. Choose Next.

  4. Choose use private network for interconnect and click Next.

  5. The Network Configuration page appears. Enter the public hostnames for all nodes. The private hostnames will be automatically entered as public_name.san. Accept the default or change as appropriate for the cluster configuration. Click Next.

  6. The Cluster File System Options page appears. Choose CFS for Data files. Click Next.

  7. The CFS for data files page appears. Choose another partition and click Next.

  8. The VIA Detection screen appears, stating whether Virtual Interface Architecture (VIA) hardware was detected. Choose yes or no depending on the configuration. Please contact the cluster hardware vendor if you are unsure. Click Next.

  9. The Install Location screen appears. It will default to the WIN_HOME\system32\osd9i directory. Accept the default and click Finish.

  10. The Cluster Setup window will appear. This will show the progress in installing the cluster files and creating the cluster services on all nodes. If no errors occur, the Oracle Cluster Setup Wizard application will complete and close automatically

At the end, verify that all nodes have the following services running and are set to automatic startup within Control Panel => Services:

  • Oracle Object Service

  • OracleCMService9i

  • OracleClusterVolumeService (for OCFS only)

Verify that all nodes have an osd9i subdirectory in the WIN_HOME\system32 directory. Also verify that all node registries contain the following key: HKEY_LOCAL_MACHINE\Software\Oracle\osd9i.


For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

 

 

 
 
 

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