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Scaling of DPM server RRS feed

  • Question

  • Is there any recommended size limit for DPM 2012 R2 regarding max. size of the diskpool? I have read 80 TB for replica volume and 40 TB for the recovery point volume, which would be a limit of max. 120 TB per DPM-server?

    /Amir
    Wednesday, August 27, 2014 10:39 AM

Answers

  • Hello !

    Please refer to this official link :

    http://technet.microsoft.com/en-us/library/hh757757.aspx

    Data source limit for DPM server

    64-bit computers

    600 volumes, of which 300 are replica volumes and 300 are recovery point volumes

    Data sources are typically spread across approximately 75 servers and 150 client computers.

    120 TB per DPM server, with 80 TB replica size with a maximum recovery point size of 40 TB

    Hope this helps


    Note: This posting is provided 'AS IS' with no warranties or guarantees, and confers no rights. Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable. This helps the community, keeps the forums tidy, and recognises useful contributions.

    • Marked as answer by Jaan Meijer Wednesday, August 27, 2014 5:20 PM
    Wednesday, August 27, 2014 10:57 AM

All replies

  • Hello !

    Please refer to this official link :

    http://technet.microsoft.com/en-us/library/hh757757.aspx

    Data source limit for DPM server

    64-bit computers

    600 volumes, of which 300 are replica volumes and 300 are recovery point volumes

    Data sources are typically spread across approximately 75 servers and 150 client computers.

    120 TB per DPM server, with 80 TB replica size with a maximum recovery point size of 40 TB

    Hope this helps


    Note: This posting is provided 'AS IS' with no warranties or guarantees, and confers no rights. Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable. This helps the community, keeps the forums tidy, and recognises useful contributions.

    • Marked as answer by Jaan Meijer Wednesday, August 27, 2014 5:20 PM
    Wednesday, August 27, 2014 10:57 AM
  • Hi Matthias,

    Thank you for your quick reply. Do you know if this limit of 120 TB is a recommended size limit or if things stops working if this limit is reached?

    /Amir
    Wednesday, August 27, 2014 11:02 AM
  • Personaly I never tested that.

    But if we refer to this link: http://social.technet.microsoft.com/Forums/.../dpm-2010-storage-limitations

    Stephane told that DPM will allow you to go beyond the limit. It's just that you will not be supported by Microsoft in case of failure.

    To be sure, you can open a Microsoft support case to ask the reasons of this limitation.

    Hope this helps.


    Note: This posting is provided 'AS IS' with no warranties or guarantees, and confers no rights. Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable. This helps the community, keeps the forums tidy, and recognises useful contributions.


    Wednesday, August 27, 2014 12:15 PM
  • Thank you Matthias!

    /Amir
    Wednesday, August 27, 2014 5:21 PM
  • It's worth mentioning what happens when you reach the scaling limits of DPM:

    For a typical workload, where a scaled DPM server protects a large number of "normal sized" servers, and you have the luxury of adding extra "disks" (or RAID volumes, or SAN LUNs) at any time to the DPM server as required, you will see that the main limit is the number of logical volumes the "Windows Dynamic Disk" system can create and maintain via its LDM database.

    The 300 protected volume suggested limit, which results in 600 volumes on the DPM server (300 replicas, and 300 recovery point volumes), is designed to permit each replica volume and recovery point volume to be extended in size approx. 2 times each. (600 x 3 = 1800, which is just under the 2000 volume limit of "Windows Dynamic Disks".

    Each time a volume is extended in size, the extension is counted as a distinct volume by the LDM "Windows Dynamic Disks" database.  This database can manage a maximum of 2000 volumes.

    http://technet.microsoft.com/en-us/library/cc757696.aspx

    "Regardless of whether the dynamic disk uses the master boot record (MBR) or GUID partition table (GPT) partition style, you can create up to 2,000 dynamic volumes, although the recommended number of dynamic volumes is 32 or less."


    Tuesday, September 2, 2014 8:29 AM
  • Is there any recommended size limit for DPM 2012 R2 regarding max. size of the diskpool? I have read 80 TB for replica volume and 40 TB for the recovery point volume, which would be a limit of max. 120 TB per DPM-server?

    /Amir

    I imagine you could have 300 of the 80TB replica volumes, and a matching 300 of the 40TB recovery point volumes, so total disk space to attach to the server is: 300x80TB+200x40TB=32 PetaBytes.

    However, I think the Windows Dynamic Disk system can manage a maximum of 32 disks, so you'd need to provide this storage to the DPM server as volumes at least 1PB in size each.

    Tuesday, September 2, 2014 8:49 AM