Database Backup and Recovery (MOSC)

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rman maintenance channels

edited Sep 2, 2010 3:07AM in Database Backup and Recovery (MOSC) 3 commentsAnswered
We have a VTL system managed by Netbackup.  We have a maximum of 16 virtual drives.

When we run RMAN crosscheck, we usually allocate maintenance channels to keep from occupying a virtual drive because virtual tape IO is not needed for crosscheck.  In theory, this leaves the virutal drives available for other IO operations.

Is this neccessary?  If I use automatic channels rather then maintenance channels, will the crosscheck command allocate a virtual IO device during the crosscheck operation, thus making it unavailable to other backups?

Our intention is to run crosschecks for over 20 production instances simultaneusly to recon the RMAN catalog with Netbackup weekly.  If I use regular maintenance channels, I fear I may hold all virtual drives during the long running crosscheck operation.

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