Extended Retention is really Bad for tape usage

Last post 11-04-2010, 6:51 AM by peleeb. 5 replies.
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  • Extended Retention is really Bad for tape usage
    Posted: 09-10-2010, 4:18 AM

    I have configured some storage policies that use extended retention on a secondary copy to keep a monthly full back up for 2 years. The normal retention ive set is 3 months.

    Now ive been looking at why im not getting very many recyclable tapes and have found that commvault is not seperating the data that needs to be kept for 2 years from the data being kept for 3 months.

    The upshot of this is that we have some tapes with only one or very few pieces of valid data on them which wont expire for another year.

    I have 2 questions:

    1. Is there any way i can move all this long term data to another set of tapes?

    2. Can i configure CommVault to store extended retention data on a seperate set of tapes?

     

    thanks

    Ross.

  • Re: Extended Retention is really Bad for tape usage
    Posted: 09-10-2010, 4:47 AM

    Indeed, extended retention is bad for tape rotation..

    Make a new selective storage policy copy in your existing storage policy! This will allow you - via an auxcopy - to copy full backups based on certain criteria ..

    Then schedule an auxcopy on a regular basis.  Using the proper retention (extended) on this copy.

    Run an auxcopy... and get rid of the extended retention in your primary storage policy copy...

     

    Kind regards,

    Renaat

  • Re: Extended Retention is really Bad for tape usage
    Posted: 09-10-2010, 4:55 AM

    Thanks for the reply.

    This is the way i used to do things but i was advised by a normally trustworthy support person that extended retention was a better way of doing things.

    Back to plan A it is.

  • Re: Extended Retention is really Bad for tape usage
    Posted: 09-10-2010, 12:12 PM

    It's rediculous how many tapes are tied up from extended retention jobs.  It would have been nice to know this when we were in the design phase!

  • Re: Extended Retention is really Bad for tape usage
    Posted: 09-10-2010, 3:10 PM

    I've seen this topic brought up a few times in other threads with the outcome always being the same.

    Would an option to "condense media" be helpful here?

  • Re: Extended Retention is really Bad for tape usage
    Posted: 11-04-2010, 6:51 AM

    A condense option would be primo.  TSM has it and it's a lifesaver.

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