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Server 2019 - DPM 16 - Very slow network RRS feed

  • Question

  • I took the plunge for Server 2019, created a Storage Pool of 16 disks and created a REFS Deduped Volume.

    Installed DPM 16, SQL 16, on DPM UR 7

    I am experiencing consist dreadful network performance on 10Gbit network on dedicated network.

    Backup mostly from 16 hosts using S2D, hyper converged network.

    BITS not in use.

    Wednesday, March 13, 2019 11:33 AM

Answers

  • I fixed this in the end.  Obscure setting in the network card, HP Emulex 556 - Network Direct MTU.....was 1024 and should of been 4096.  That was halfling the performance of 1 side of the SET team.

    Running NTTTCP tests from cluster to host shows 9.6Gbit to 1 NIC, 5GBit to 2 NIC.  Changing this allowed full flow to the server, dropping the vNIC on the VM and readded, I now get 8Gbit to the DPM VM.

    Think my VMQ/RSS is screwed up slightly as it maxing out only a few cores on the host during the network saturation but that's a issue for another day.  im happy with 8Gbit.  Real world backup is around 2-4Gbit.

    Just in case anyone else has issues.

    • Marked as answer by richsmif Wednesday, March 13, 2019 10:59 PM
    Wednesday, March 13, 2019 10:58 PM

All replies

  • Hello!

    Windows Server 2019 is not officially supported for being a DPM server or being protected DPM 2016 or any DPM version out there as of today.

    Check the link below for the supported workloads and operating systems for DPM 2016:

    What can DPM back up?
    https://docs.microsoft.com/en-us/system-center/dpm/dpm-protection-matrix?view=sc-dpm-2016

    DPM 2016 Server compatible operating systems

    • Windows Server 2016, Datacenter, and Standard editions
    • Windows Server 2012 R2, Datacenter, and Standard editions


    Reference:

    https://docs.microsoft.com/en-us/system-center/dpm/prepare-environment-for-dpm?view=sc-dpm-2016#dpm-server

    DPM 2019 is coming out now in march 2019 and will offer support for Windows Server 2019.

    DPM 2019 contains performance improvements making DPM more stable and performant compared to DPM 2016. With DPM 2019 changes we recommend using tiered storage (using SSD), which will result in 70-75% gain in backup speeds compared to DPM 2016.

    Also, in near future Windows team would be releasing few ReFS fixes on top of Windows Server 2019 further enhancing the DPM performance.

    Best regards,
    Leon


    Blog: https://thesystemcenterblog.com LinkedIn:

    • Proposed as answer by Leon Laude Wednesday, March 13, 2019 1:26 PM
    Wednesday, March 13, 2019 11:46 AM
  • I wanted to make use of the ReFS Deduplication, but yeh understood.  As its 13th March already, i'll be watching very closely.
    Wednesday, March 13, 2019 1:23 PM
  • I understand, it won't be long now, just sit tight!

    Blog: https://thesystemcenterblog.com LinkedIn:

    Wednesday, March 13, 2019 1:25 PM
  • I fixed this in the end.  Obscure setting in the network card, HP Emulex 556 - Network Direct MTU.....was 1024 and should of been 4096.  That was halfling the performance of 1 side of the SET team.

    Running NTTTCP tests from cluster to host shows 9.6Gbit to 1 NIC, 5GBit to 2 NIC.  Changing this allowed full flow to the server, dropping the vNIC on the VM and readded, I now get 8Gbit to the DPM VM.

    Think my VMQ/RSS is screwed up slightly as it maxing out only a few cores on the host during the network saturation but that's a issue for another day.  im happy with 8Gbit.  Real world backup is around 2-4Gbit.

    Just in case anyone else has issues.

    • Marked as answer by richsmif Wednesday, March 13, 2019 10:59 PM
    Wednesday, March 13, 2019 10:58 PM
  • Great! Thanks for sharing this!

    Blog: https://thesystemcenterblog.com LinkedIn:

    Wednesday, March 13, 2019 11:10 PM