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Hyper-V over SMB, Backup traffic is only between DPM and Host instead of DPM and Fileserver RRS feed

  • Question

  • Hi

    I'm trying to accomplish step G: in the following picture:

    "G. Based on the Shadow Copy device name from the Shadow Copy properties on the Application Server, the Backup Server can access the data on the Shadow Copy shares on the File Servers for backup. The Shadow Copy share will have the same permissions as the original share."

    Everything works so far: The Fileserver create a Fileshare where the Shadow Copy is accessible. The VM share permissions on original share is: Everyone:Full and NTFS is: Hosts+DPM:Full.

    According to Point G: DPM should get his backup directly from the Fileserver. But thats not the Case: Backup Traffic flows between Hyper-V Host and DPM Server. Any ideas?

    Environment: all involved Servers are 2012 R2, DPM 2012 R2

    Source: http://blogs.technet.com/b/clausjor/archive/2012/06/14/vss-for-smb-file-shares.aspx

    Wednesday, September 10, 2014 12:22 PM

Answers

  • Hi,

    That is correct and is the current design. Data is read from shadow copy on the file server by the DPM agent on the file server and sent to the DPM agent on the Hyper-V host, which sends it to DPM agent on the DPM Server.

    Think of it this way.

    Mom in Seattle calls her daughter in Ohio and asks how the daughters son is who lives in Florida.  The daughter calls her son in Florida on a cell phone and asks how he is.  He replies back to his mom on the cell phone because he is not part of the conversation over the land line with grandma. The daughter then relays the message to Mom that all is good with her son. 

     


    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.

    • Marked as answer by Bader Patrick Friday, September 12, 2014 1:09 PM
    Friday, September 12, 2014 11:13 AM
    Moderator

All replies

  • Hi,

    That is correct and is the current design. Data is read from shadow copy on the file server by the DPM agent on the file server and sent to the DPM agent on the Hyper-V host, which sends it to DPM agent on the DPM Server.

    Think of it this way.

    Mom in Seattle calls her daughter in Ohio and asks how the daughters son is who lives in Florida.  The daughter calls her son in Florida on a cell phone and asks how he is.  He replies back to his mom on the cell phone because he is not part of the conversation over the land line with grandma. The daughter then relays the message to Mom that all is good with her son. 

     


    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.

    • Marked as answer by Bader Patrick Friday, September 12, 2014 1:09 PM
    Friday, September 12, 2014 11:13 AM
    Moderator
  • Hey Mike

    Thanks for the answer.

    So the sentence: "the Backup Server can access the data on the Shadow Copy shares on the File Servers" confused me and is truly wrong.

    Friday, September 12, 2014 1:09 PM
  • Hi,

    The page you are referencing is the Windows spec and shows you how it can be done by a backup application. DPM has chosen a different method but that does not preclude other backup vendors from doing it as described in the spec.

    hope that helps clear up the confusion.


    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 12, 2014 4:23 PM
    Moderator
  • Hi Mike

    Thanks, that cleared everything up.

    Monday, September 15, 2014 6:57 AM