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Determining storage for system states RRS feed

  • Question

  • Hello,

    We have DPM set up in a test environment with a few member servers and a domain controller.  I'm trying to determine the amount of disk space that would be required for DPM to back up the system state of a server with a retention of 7 days.

    Microsoft had said that system states are full backups and you should allocate 7 X a single system state backup or 77GB per machine (7 x 11GB).  Does anyone know if DPM will sync only the changed blocks of a system state?  This would drastically reduce the amount of storage needed.

    Thanks,

    JS


    Jeff Stewart

    • Moved by Yegor StartsevModerator Wednesday, October 24, 2012 6:11 AM (From:Data Protection Manager - Disaster Protection)
    Friday, September 28, 2012 9:28 PM

Answers

  • Hi,

    According to the formula for systemstate - http://technet.microsoft.com/en-us/library/ff399599.aspx

    For system state:

    • (Data source size x  retention range in days x 2) / 100 + 1600 MB

    You would only need 3.3GB for recovery point volume for 7 days protection of an 11GB systemstate.

    11811160064*7*2/100+1677721600=3331284008.96 which is only 3,331,284,008 or 3.3GB


    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.

    Friday, September 28, 2012 9:48 PM
    Moderator
  • According to the formula for systemstate - http://technet.microsoft.com/en-us/library/ff399599.aspx

    For system state:

    • (Data source size x  retention range in days x 2) / 100 + 1600 MB

    You would only need 3.3GB for recovery point volume for 7 days protection of an 11GB systemstate.

    11811160064*7*2/100+1677721600=3331284008.96 which is only 3,331,284,008 or 3.3GB

    Hi,

    According to real life practice... You'll need about SS size * retention range in days for recovery point volume to protect a typical DC and about SS size * 0,8 * retention range in days for a member server. Correct me if I'm wrong.

    My DPM blog ystartsev.wordpress.com

    • Marked as answer by Adinn Monday, May 13, 2013 11:10 PM
    Wednesday, October 24, 2012 6:10 AM
    Moderator

All replies

  • Hi,

    According to the formula for systemstate - http://technet.microsoft.com/en-us/library/ff399599.aspx

    For system state:

    • (Data source size x  retention range in days x 2) / 100 + 1600 MB

    You would only need 3.3GB for recovery point volume for 7 days protection of an 11GB systemstate.

    11811160064*7*2/100+1677721600=3331284008.96 which is only 3,331,284,008 or 3.3GB


    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.

    Friday, September 28, 2012 9:48 PM
    Moderator
  • According to the formula for systemstate - http://technet.microsoft.com/en-us/library/ff399599.aspx

    For system state:

    • (Data source size x  retention range in days x 2) / 100 + 1600 MB

    You would only need 3.3GB for recovery point volume for 7 days protection of an 11GB systemstate.

    11811160064*7*2/100+1677721600=3331284008.96 which is only 3,331,284,008 or 3.3GB

    Hi,

    According to real life practice... You'll need about SS size * retention range in days for recovery point volume to protect a typical DC and about SS size * 0,8 * retention range in days for a member server. Correct me if I'm wrong.

    My DPM blog ystartsev.wordpress.com

    • Marked as answer by Adinn Monday, May 13, 2013 11:10 PM
    Wednesday, October 24, 2012 6:10 AM
    Moderator
  • I still want to hear some thoughts here. Come on guys. Do I miss something?

    Thanks in advance.


    My DPM blog ystartsev.wordpress.com

    Wednesday, January 30, 2013 7:17 PM
    Moderator
  • Hi,

    If you find the published formula to be off in your environment, then please calculate your own based on "real word" numbers.


    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.

    Wednesday, January 30, 2013 7:45 PM
    Moderator