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Data Protection Manager 2012 Single Instance Storage RRS feed

  • Question

  • Hello,

    I have already tried to search for an answer for this question but still don't really "get it". I understand that previous versions of DPM use Single Instance Storage, this is the first time I have used DPM and I'm starting at version 2012 installed on server 2012. In my testing I can see that DPM 2012 seems to create a new volume for each system its backing up, so everything looks separated across different volumes, I also notice that data deduplication feature is enabled which is assume DPM did that during installation, however it isn't actually enabled on any particular volume so it isn't doing anything. Naturally I would have assumed that DPM 2012 being a brand new product and compatible with server 2012 that it would utilise the data deduplication feature of the server..... but it's not. so my question is, does DPM 2012 utilise data deduplication or single instance storage, if not how can we save lots of data from duplicate backups of things like DC's, File servers and Exchange Mailbox servers? all of which have high levels of duplicated data.

    Also, I don't full understand the difference between SIS and De-dupe, am I correct in saying that SIS just removes the need for an entire duplicated file (regardless of its filename) and de-dupe actually compares bits and bytes of data across multiple files regardless of file type, name or size...?

    thanks for any further information

    Steve

    Thursday, April 25, 2013 10:15 PM

All replies

  • Hi,

    First I would like to mention that only DPM 2012 Sp1 is supported on Windows 2012 servers, so if you are not running Sp1, please upgrade to avoid problems.

    DPM does not utilize SIS or Dedupe for storage pool disks. Both of those features are enabled on the DPM server so we can protect SIS enabled volumes or Deduped volumes on Windows 2012.

    Please the windows 2012 technical overview for dedupe feature.


    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, April 26, 2013 1:11 AM
    Moderator
  • thanks  the reply, I have already seen the technical overview of the de-dupe feature in server 2012. so, with DPM 2012 SP1, does this mean that if the server is protecting 2x Windows 2012 servers and each one is say 15GB in size, then it will require 30GB of backup space on the DPM server? if this is the case, then why was the SIS feature removed, as I understand it was available in prior versions of DPM (although I haven't used these)

    Thanks

    Steve

    Sunday, April 28, 2013 1:15 PM
  • Hi Steve,

    No feature was removed in DPM 2012 SP1, protection for Windows 2003-2008 R2 SIS enabled volumes or Windows 2012 Deduped volumes is the same.

    Each protected data source gets their own replica volume, and required size of that replica is equal to or greater than the size of the protected data.  In the case of file data stored on a Windows 2008 server the replica volume size required will be that of the used space, be that of a SIS enabled volume or a non-SIS enabled volume.  DPM will protect the data in it's native format.

    For Windows 2012 volumes, again DPM will protect it in the same state (non-deduped or deduped) and requires as much space on the DPM replica as what is used on the source volume. 

    This efficient backup capability can be availed only when full volume is backed up and restored.  Here is the table that shows various scenarios and DPM’s protection and recovery efficiency capabilities.

    Since SIS / Dedupe work at the volume level, there can be no additional savings when protecting multiple volumes that may contain like data.

    FYI- New Blog: http://blogs.technet.com/b/dpm/archive/2013/04/29/sc-2012-sp1-dpm-efficient-protection-of-windows-2012-dedup-volume.aspx


    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.


    Monday, April 29, 2013 8:03 PM
    Moderator