none
Server Backup is extremly slow any ideas?

    Question

  • Hi! I tested for the first time the internal backup feature of windows 2011 sbs. i configured the backup like here.

    https://docs.microsoft.com/en-us/previous-versions/office/exchange-server-2010/dd876854(v=exchg.141)

    We make a backup to a networkshare to another server.

    When i copy some files with the explorer to the share, the speed is over 100mb/s.

    So very good.

    But the backup tool needs very long... about 5hours for 130gb. is this normal?


    We use malwarebytes, I have complete deactivated it. This don’t help.
    Sunday, November 18, 2018 4:09 PM

All replies

  • Hi,

    > But the backup tool needs very long... about 5hours for 130gb. is this normal?
    It depends.

    Based on your description, backup is stored on a network share location, in order to have a comparation, you can try to configure the back up to local connected(cable connected) disk. If it is more faster than backup to network location, we may need to narrow down the problem via network performance. 

    Please Note: 
    If you store backups in a network share, only one version of your backup will be maintained. You will be required to overwrite the existing backup.

    Introducing the Small Business Server 2011 Backup Wizard:
    https://blogs.technet.microsoft.com/sbs/2011/02/15/introducing-the-small-business-server-2011-backup-wizard/

    Also, please try below suggestion.

    Disable NetDMA:
    1. Click Start, click Run, type regedit, and then click OK.

    2. Locate the following registry subkey, and then click it:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    3. Double-click the EnableTCPA registry entry.
    Note If this registry entry does not exist, right-click Parameters, point to New, click DWORD Value, type EnableTCPA, and then press ENTER.

    4. To disable NetDMA, type 0 in the Value data box, and then click OK.

    Disable TCP Chimney Offload and RSS via CMD command line:
    netsh int tcp set global chimney=disabled
    netsh int tcp set global rss=disabled

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, November 19, 2018 7:53 AM
    Moderator
  • Hi,

    How things are going there on this issue?

    Please let me know if you would like further assistance.

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, November 21, 2018 3:01 AM
    Moderator
  • If it was one big file copying 130 GB will take about 3 hours over 100 Mb/s but as backup does more than that I am not surprised it takes longer. 

    A rough calculation is done as follows:

    130 GB × 9000 / 100 Mb/s = 11700 s ≈ 3.25 hours

    So, it is not slow and probably your network speed is maxed out.


    Mariëtte Knap
    www.server-essentials.com | Linkedin | Migrations done the easy way | Updated migration guide: Migrate SBS 2011 to Windows Server 2016 Essentials

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.

    Thursday, November 22, 2018 9:22 AM
  • @Mariëtte Knap

    100MB in 1 Second.  (Its a gigabit Network - so we can copy with 100MB per Second)


    That means: about 5,8GB in 1minute and 351GB in an hour.

    I tested it with big files, as you can see i can copy the backuped vhd file in 30minutes. back to the server from which it is coming. 

    The Windows Server Backup Software needs tonight 11hours to create this file...... :-(

    Thursday, November 22, 2018 11:57 AM
  • Ah OK, I see. Well, once the first backup is done it does incremental backups so that will be quicker. I thought you wrote that you had 100 Mb/sec network, my mistake :)

    Mariëtte Knap
    www.server-essentials.com | Linkedin | Migrations done the easy way | Updated migration guide: Migrate SBS 2011 to Windows Server 2016 Essentials

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.

    Thursday, November 22, 2018 12:38 PM
  • No problem ;-) this was an incremental Backup.... i started with the initial one when i made this post :-(
    Thursday, November 22, 2018 12:40 PM
  • Hi,

    If possible, we can try a backup test without 3rd party process, it is a direct way to determine if it is 3rd party process effect problem. Clean boot can be considered. 

    Also, we can change the backup location to confirm that if it is disk/location specific problem.

    Otherwise, we may need to capture packaged of backup operation, it may takes a log of workload to analysis the package and narrow down the problem. Too such as process monitor and network monitor can be considered. 

    Best Regards,
    Eve Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, November 29, 2018 8:30 AM
    Moderator