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File System configured incorrectly for ODM shuts down Oracle

Linking Oracle9i with the Veritas ODM libraries provides the best file system performance. See Relinking the SF Oracle RAC libraries to Oracle - using the installer for instructions on creating the link. Shared file systems in RAC clusters without ODM Libraries linked to Oracle9i may exhibit slow performance and are not supported.

If ODM cannot find the resources it needs to provide support for cluster file systems, it does not allow Oracle to identify cluster files and causes Oracle to fail at startup.

 To verify cluster status

Run the command:

# cat /dev/odm/cluster

cluster status: enabled

If the status is "enabled," ODM is supporting cluster files. Any other cluster status indicates that ODM is not supporting cluster files. Other possible values include:

 

pending 

ODM cannot yet communicate with its peers, but anticipates being able to eventually. 

failed 

ODM cluster support has failed to initialize properly. Check console logs. 

disabled 

ODM is not supporting cluster files. If you think it should, check: 

  • /dev/odm mount options in /etc/vfstab. If the nocluster option is being used, it can force the disabled cluster support state.
  • Make sure the VRTSgms (group messaging service) package is installed.

If /dev/odm is not mounted, no status can be reported.

 To start ODM

  1. Execute:

    # /etc/init.d/vxgms start

  2. Execute:

    # /etc/init.d/vxodm start


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