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DPM 2012 with Failover Cluster for Hyper-V

05/02/2012

One of the new features that DPM brings the possibility of 2012 make up the VMs that are on a cluster storage by using CSV snapshot capabilities of the storage itself.

This is a major breakthrough for two reasons:

  1. The storage has a superior performance in the snapshot because it is native to and occurring in the level of the bits to be copied and not in the file system as happens with snapshots created by Windows VSS
  2. With the snapshot being held by storage, do not encounter Redirect Access in the cluster and not the CSV errors being accessed simultaneously as with parallel backups of different VMs. With the hardware snapshot for backup you can create jobs for VMs running paralell

However, in most arrays are not left to allocations, which will generate snapshots in the Event Viewer of the host on which the backup was made a mistake of lack of enough space to generate a snapshot.

In these cases the ideal would be to reformulate the space of allocating LUNs to snapshot sufficient space for the copy of the largest existing backups, since the snapshot is deleted by DPM after the copy. It is also necessary to allow the hosts to perform snapshots, as the image below shows an EqualLogic configuration:

clip_image002

On the other hand, if there is no free space to the snapshot but this is a feature that exists on the storage you are using, the option is to disable the snapshot service integration kit, as seen below in the HIT Kit of EqualLogic:

clip_image002

If you need more information, please visit the link http://technet.microsoft.com/en-us/library/hh758090.aspx

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