DOCUMENTATION: Oracle Cluster File System (OCFS) considerations with Oracle database backups in NetBackup.

Problem

DOCUMENTATION: Oracle Cluster File System (OCFS) considerations with Oracle database backups in NetBackup.

Solution

Manual: Veritas NetBackup 6.0 for Oracle System Administrator's Guide for UNIX and Linux, Page: 27

Modification Type: Supplement.

Modification:
Backups of Oracle databases that reside on an Oracle Cluster File System (OCFS) or an Oracle Cluster File System 2 (OCFS2) using the NetBackup Oracle database agent are fully supported.  

For RMAN stream based backups (i.e. non-proxy copy) both OCFS and OCFS2 are supported.

OCFS cannot be backed up using bpbkar, as it is not POSIX compliant.  Attempting this can cause system instability and is not supported.  However, OCFS2 is a POSIX compliant general purpose file system. It can also be backed up using client (i.e. bpbkar), though file system-specific features (such as Access Control Lists) won't be supported.  This sort of operations may be useful when backing up Oracle home directories from the system sharing the data.

OCFS and OCFS2 are shared disk cluster file systems released for Linux, specifically designed to ease administration of Oracle 9i Real Application Clusters (RAC). Since OCFS uses direct_IO, standard OS utilities cannot be used. OCFS provides its own set of file management utilities. The OCFS User Guide advises using RMAN or its own set of file management utilities that support direct_IO for backup.  

More information on OCFS can be found at:
 http://oss.oracle.com/projects/ocfs



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