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When using MS VSS on Windows with Oracle RAC, do I need to run the VSS on each node where I have an Oracle RAC instance?

April 26, 2017instance MS Node Oracle RAC run vss Windows

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When using MS VSS on Windows with Oracle RAC, do I need to run the VSS on each node where I have an Oracle RAC instance?

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There is no need to run Oracle VSS writer instance on each Oracle RAC node (even though it is installed and enabled by default on all nodes). And the documentation in Windows Platform Doc for Oracle VSS writer is applicable to Oracle RAC also. The ability of clustered file system to create a Windows Shadow copy is a MUST to backup Oracle RAC database using Oracle VSS writer. The only other requirement is that, all the archived logs generated by database must be accessible on node where backup is initiated using Oracle VSS writer. VSS coordinates storage snapshot of db files – the VSS writer places the db in hot backup mode so that the VSS provider can initiate the snapshot. So, RMAN is not backing up anything in this case. When a VSS restore of a db is issued, the writer automatically invokes RMAN to perform needed recovery actions after the snapshot is restored by the provider – that is the real value add of the writer.