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How many snapshots can we generate in Hyper-V

    Question

  • Hi all,

    How many snapshots can we generate for the VM in Hyper-V? Is there any limitation?

    If Yes/No, pls. give the official link. Thanks in advance.

    Regards,

    -Hercule

     

    Tuesday, June 08, 2010 8:21 AM

Answers

All replies

  • Hiya,

    I dont think there is any theoretical limit for this. It uses more or less the same concept as differencing disks. Which from the referenced example can be quite nested.
    http://technet.microsoft.com/en-us/library/cc720381(WS.10).aspx

    I would however always try to keep the number of snapshots at zero. Using it only when strightly neccessary and definently never use it for production unless within a service window. In other words, I wouldnt let me machines run with a snapshot for a period past my service window.

    Additional info on snapshots:
    http://technet.microsoft.com/en-us/library/dd560637(WS.10).aspx

    • Marked as answer by Hercule Li Wednesday, June 09, 2010 1:56 AM
    • Unmarked as answer by Hercule Li Tuesday, June 29, 2010 9:21 AM
    Tuesday, June 08, 2010 11:17 AM
  • I have never seen an official statement on this.

    In the end, the number of snapshots is not limited by Hyper-V, but by your storage and your configuration.  Let me elaborate:

    If you are using Hyper-V v1 and you have a default VM configuration - then your snapshots will be stored on the Parent parition system partition. 

    If you are using Hyper-V R2 and you have a dfault VM configuration - then your snapshots will be stored with the rest of the VM files.

    If your VM is not running then a snapshot is only the addition of a differencing disk and an XML file.  If the VM is running then a snapshost is the addition of a differencing disk plus a dump of the memory state of the VM (RAM) plus the XML file.

     


    Brian Ehlert (hopefully you have found this useful)
    • Marked as answer by Hercule Li Wednesday, June 09, 2010 1:57 AM
    • Unmarked as answer by Hercule Li Tuesday, June 29, 2010 9:21 AM
    Tuesday, June 08, 2010 3:30 PM
    Moderator
  • Thanks Brian and Jesper.

     

    Wednesday, June 09, 2010 1:56 AM
  • Get new information. From --

     http://technet.microsoft.com/en-us/library/ee405267(WS.10).aspx

    The max number for snapshots is 50.

    • Marked as answer by Hercule Li Tuesday, June 29, 2010 9:22 AM
    Tuesday, June 29, 2010 9:20 AM