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Oracle RMAN and Commvault Deduplication

  • July 15, 2026
  • 0 replies
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Hi guys,
If I want to achieve the best dedup efficiancy, I have to set the Max Open Files in the Commvault subclient(s) of an Oracle Instance to 1.

Otherwise, RMAN will multiplex the number of files allowed into one channel / stream, which leads to poor dedupe ratio for the backups of this databases.

Is there an option to influence the parameter of default subclient during instance creation when a new instance is discovered ?
Setting the amount of streams and restricting the MaxOpenFiles might be beneficial when adding larger amount of Instances to the environment and where disk or cloud is the primary backup destination.

rgds

Klaus