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TSM for VE requires full backup?

Discussion in 'VMWare / Virtual Machine' started by ekos, Jun 14, 2012.

  1. ekos

    ekos New Member

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    Hi

    We have 500+ VMs and we consider using TSM for VE for backup. Can you do incrementals forever with TSM for VE or do you need to make full VM backups once in a while? Making full backups of 500+ VMs let's say each two weeks or month isn't an easy job.

    Thanks
     
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  3. drivechip

    drivechip Member

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    Hi ekos

    No you can't make incrementals forever. The recommodation of IBM is to perform a full backup at least after 14 incremental backups. It is written somewhere in the user guide.

    Weekly full is quiet easy to schedule. You just need 14 schedulers. Please consider a appropriate number of vStorage servers and their sizing.
     
    ekos likes this.
  4. tobi007

    tobi007 New Member

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    The next version which come in Q4/2012 should can incremental forever!
     
  5. FastBackTSMUK

    FastBackTSMUK New Member

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    If it does then it will still need to perform a full to start with. I imagine that a 'synthetic full' we be performed as a post process on the TSM server.
     
  6. drivechip

    drivechip Member

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    Yes, I've heard from that. It was on the roadmap. I'm a bit skeptical especially regarding restore performance when using tapes. It might better work with a VTL or for disk based backups. We will see.
     
    Last edited: Sep 20, 2012
  7. FastBackTSMUK

    FastBackTSMUK New Member

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    There's documented limitations for using tape, specifically the near instant restores of volumes. Disk/VTL works best, especially when attempting to save space with de-duplication.
     
  8. tobi007

    tobi007 New Member

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    What are your experience with Full VM-Restore from type?
    I think its much slower than from disk.
     
  9. moon-buddy

    moon-buddy Moderator

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    Tape is slow. TSM for VE 6.2.2 had issues on the way the files were stored on tape. The structure was CTL-DAT-CTL-DAT-CTL etc. This required a heck of a long time to restore.

    IBM had a work around by separating the CTL and DAT files as written to two tapes. This sped up the restore. The issue is not so noticeable with disk as disk is fast and radom. Tape is sequential.
     

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