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How can I set DPM 2010 Recovery Goals to mark a daily tape as "offsite ready" the following day? RRS feed

  • Question

  • DPM Forum,

    How can I set my Recovery Goals in DPM 2010 so that a daily backup tape is marked as "offsite ready" the following day after the backup has completed?

    I recently had to remove Long Term Protection from DPM 2010 to troubleshoot a disappearing tape drive issue.  I did not document what the Recovery Goals were.  Now, during daily backups, the 2nd tape (our nightly spills over into a 2nd tape) does not get marked "offsite ready" the next morning.  During last night's backup, data from last night was written to that 2nd tape that had data from the previous night.  Once that tape filled up, it did get marked as offsite ready.  How can I properly set the Recovery Goals?

    Note: I have "co-location" enabled but I may not need it as there is only 1 Protection Group.

    Thanks in advance,

    Joe

    Thursday, September 3, 2015 3:17 PM

Answers

  • Hi,

    You will need play with the write period ratio.

    TapeWritePeriodRatio - This is a DPM Global property that can be set only when colocation is enabled and indicates the number of days for which data can be written on to a tape as a percentage of the retention period of the first data set written to the tape. This is a global setting and affects all protection groups.

    TapeWritePeriodRatio value can be between 0.0 to 1.0 the default value is 0.15 (i.e. 15%)

    NOTE DPM 2012 does not have this global property and instead has additional configuration options in the GUI to allow different write periods for different protection groups. This adds greater flexibility in determining how long you want to use a tape at the protection group(s) level.

    As an example on the impact of the TapeWritePeriodRatio setting having a default of 15% - if you have a protection group doing daily backups, with a retention period of 2 weeks (14 days), the tape will be marked offsite ready after only 2.1 days regardless of how much / little data was written to the tape. If you desire DPM to write to the tape for a week, you would need to change the TapeWritePeriodRatio to 50% using the DPM power shell command below.

    Set-DPMGlobalProperty –DPMServerName <dpm server name> -TapeWritePeriodRatio .5


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Sunday, September 13, 2015 3:51 AM
    Moderator

All replies

  • Hi,

    You will need play with the write period ratio.

    TapeWritePeriodRatio - This is a DPM Global property that can be set only when colocation is enabled and indicates the number of days for which data can be written on to a tape as a percentage of the retention period of the first data set written to the tape. This is a global setting and affects all protection groups.

    TapeWritePeriodRatio value can be between 0.0 to 1.0 the default value is 0.15 (i.e. 15%)

    NOTE DPM 2012 does not have this global property and instead has additional configuration options in the GUI to allow different write periods for different protection groups. This adds greater flexibility in determining how long you want to use a tape at the protection group(s) level.

    As an example on the impact of the TapeWritePeriodRatio setting having a default of 15% - if you have a protection group doing daily backups, with a retention period of 2 weeks (14 days), the tape will be marked offsite ready after only 2.1 days regardless of how much / little data was written to the tape. If you desire DPM to write to the tape for a week, you would need to change the TapeWritePeriodRatio to 50% using the DPM power shell command below.

    Set-DPMGlobalProperty –DPMServerName <dpm server name> -TapeWritePeriodRatio .5


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Sunday, September 13, 2015 3:51 AM
    Moderator
  • Thanks, Mike!
    Monday, September 14, 2015 6:03 PM