Way to improve restore speed for file systems?

Last post 07-14-2010, 1:57 PM by Vincenzo_Basolino. 5 replies.
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  • Way to improve restore speed for file systems?
    Posted: 07-14-2010, 9:29 AM

    Does anyone know of any settings that can be adjusted within Simpana 8 to improve restore speeds?

  • Re: Way to improve restore speed for file systems?
    Posted: 07-14-2010, 9:35 AM

    Restore speed can be impacted by many factors. Here are some questions:

    Is your restore speed comparable to your backup speed? (ex. backup is 30gig per hr. --> restore is 30gig per hr.)

    Are you multiplexing your backups? (this will affect restore dependent on your stream/factor count)

    What type of restore is this? (Database, flat file, full system, Image level etc etc)

  • Re: Way to improve restore speed for file systems?
    Posted: 07-14-2010, 9:53 AM

    No,  It will backup fairly fast but restores seem to take forever. 

    I am multiplexing when backing up.

    The restore is to a windows file system.  It was a couple pdf files no more than about than a couple of MB.

  • Re: Way to improve restore speed for file systems?
    Posted: 07-14-2010, 11:00 AM

    Multiplexing will decrease backukp time but at the cost of recovery time.  You could try not multiplexing?

  • Re: Way to improve restore speed for file systems?
    Posted: 07-14-2010, 11:56 AM

    hi bleblanc,

    Check out this forum answer.  This is for setting up streams and multiplexing to speed up backups

    http://sso.forum.commvault.com/forums/AddPost.aspx?PostID=1263&Quote=True

    What this infers is that during a restore the opposite effect will be true based on the streams and multiplexing set up for backups.

    you must review and balance need for backup completion against critical data restore.

    How does the data's restore time impact DR recovery scenario's for which data.

    Ex.  If you are heavily multiplexing your exchange data  for backup to speed up the data movement then you better test your restores to see how long it would take to get your Exchange server back up and running.  Impact to companies productivity and bottom line.

    In this case if Exchange function is critical to companies business productivity you better make sure the restore time is within your critical window.  All Data must be evaluated by this criteria.  Your backups should be configured to meet the companies DR recovery requirements.  Testing with and with out multiplexing is key to determine where the correct balance is.

    How much money the company loses because Exchange will take hours or days to restore because of a multiplexing value set to high will directly impact DR planning.

  • Re: Way to improve restore speed for file systems?
    Posted: 07-14-2010, 1:57 PM

    If you require more than just a handful of files, it might be quicker to use "restore by job" for multiplexed file system backups.

    The overview for restore by jobs specifically recommends this feature to be used when the backup is multiplexed.

    http://documentation.commvault.com/commvault/release_8_0_0/books_online_1/english_us/features/restore/restore_by_jobs.htm

     

     

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