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Recovery point growing faster than data source RRS feed

  • Question

  • Hello All,

    I am looking for some help trying to understand a recovery point volume issue we are having. We have a protection group that backups up a number of servers, one of these servers keeps exceeding its recovery point volume threshold. The retention period for the protection group is 30 days, am I right in thinking that after 30 days the recovery points should then be exported to tape and removed from the recovery point volume?

    What I can’t understand is the used amount for the recovery point volume on the server in question is growing by 4GB a day, whereas the actual data source being backed up has only grown around 8MB in the last week. Can anyone explain why the Recovery point is growing by such a large amount each day?

    Regards

    Lee

    Thursday, July 14, 2011 8:42 AM

All replies

  • Check how many recovery point is been taken per day. and if you have DPM 2010 remember that you can always shrink the recovery point and that gives you the actual size of it since the DPM by default set the Volume grow to Auto because its nearly impossible to handle it manually.

     

    Hope that helps.

    Laith.

    • Proposed as answer by Laith_IT Sunday, July 31, 2011 6:49 AM
    Tuesday, July 19, 2011 5:37 AM
  • Hi Chalee77,

    The 4GB growth / day of the used space in the RP volume is data churn.  The amount of file data that has been changed per day - You can see the amount of changed data each time we perfrom a synchronization - look at the amount of data transfered.  Of course some of it may be the same data changed multiple times throughout the day, so in that case only the first change would be placed in the RP volume for that RP time, so the sum of all synchronizations between RP's does NOT equal the amound of data that will be placed in the RP volume.

      Recovery points are FIFO - First-in, first-out, so if your retention period is 30 days, we won't prune (delete) the 1st days recovery points until the 31st day.  We prune everyday to maintain the 30 days retention.  Once you hit the 30 days recovery points, the recovery point volume should not need to grow further unless you are protecting more files, or the rate of churn increases for some reason (end of month processing for example)    


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Thursday, July 21, 2011 5:44 AM
    Moderator