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Child partition snapshot and agent backup will that work? RRS feed

  • Question

  • Today we have a Protection group that do backup of the data and files from an agent within the hyper-v – E.g. Exchange – SQL and files on the fileserver...

    Further, we would like to setup a Protection thru a client on the Hyper-V host, that will do backup of the full Hyper V servers…

     

    The question is, will that cause problems or data corruption, since there will be 2 backups of the same data (one with an agent inside, and another with child partition snapshot from the Hyper-V host)?

    • Moved by MarcReynolds Monday, February 6, 2012 4:56 PM (From:Data Protection Manager)
    Monday, February 6, 2012 2:17 PM

Answers

  • Hi,

    You need to add a registry setting so that the host level backups do not effect the guest level backups whe it comes to log truncation issues.  See the following Hyper-V rollup fix, issue 3.


    975354  A Hyper-V update rollup is available for Windows Server 2008 R2
    http://support.microsoft.com/default.aspx?scid=kb;EN-US;975354

    See Issue 3

    <Snip>
    The application backup operation in the virtual machine (VM) is incorrectly affected by the VM backup operation on the server that is running Hyper-V.

    Note You may still experience issue 3 after you install this hotfix. You can apply the following registry entry in a virtual machine to fix issue 3 for that virtual machine:

    Location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Virtualization\VssRequestor
    Name: BackupType
    Type: REG_DWORD
    Value: 0 or 1

    If this registry entry is created and its value is set to 1 , application backup will not be affected by the virtual machine backup operation on the server that is running Hyper-V. If this registry entry does not exist, or if its value is 0 , issue 3 occurs.
    >snip<

     Also, the backups for guest level and host level should be in seperate PG's so that the times can be staggered.

     


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Monday, February 6, 2012 8:21 PM
    Moderator

All replies

  • Hi,

    You need to add a registry setting so that the host level backups do not effect the guest level backups whe it comes to log truncation issues.  See the following Hyper-V rollup fix, issue 3.


    975354  A Hyper-V update rollup is available for Windows Server 2008 R2
    http://support.microsoft.com/default.aspx?scid=kb;EN-US;975354

    See Issue 3

    <Snip>
    The application backup operation in the virtual machine (VM) is incorrectly affected by the VM backup operation on the server that is running Hyper-V.

    Note You may still experience issue 3 after you install this hotfix. You can apply the following registry entry in a virtual machine to fix issue 3 for that virtual machine:

    Location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Virtualization\VssRequestor
    Name: BackupType
    Type: REG_DWORD
    Value: 0 or 1

    If this registry entry is created and its value is set to 1 , application backup will not be affected by the virtual machine backup operation on the server that is running Hyper-V. If this registry entry does not exist, or if its value is 0 , issue 3 occurs.
    >snip<

     Also, the backups for guest level and host level should be in seperate PG's so that the times can be staggered.

     


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Monday, February 6, 2012 8:21 PM
    Moderator
  • Perfect - I will give it a try and let you know the result - Thanks!<o:p></o:p>

    Anothers Q:

    I have a few servers with no entry of the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Virtualization\VssRequestor

    Will the VssRequestor first be visible when I add the snapshot for the VM on the DPM? Or do I just make the key by myself?


    Best Regards Mig selv

    Tuesday, February 7, 2012 12:32 PM
  • Hi,

    Just make it yourself.


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Tuesday, February 7, 2012 4:32 PM
    Moderator
  • Brillant case-solved! :-)


    Best Regards Mig selv

    Wednesday, February 8, 2012 1:31 PM