locked
Using shadow copy with DFS DFS replication\namespace RRS feed

  • Question

  • I’ve got two servers (Server A, Server B)that both hold the same data (D:\Data) which is replicated using DFS replication and accessed by the windows 7 clients using a namespace. Naturally enough the namespace points to Server A\Data and Server B\Data.

     

    I want to make use of Shadow copies\previous versions on the server to allow the users to retrieve previous versions of their documents, so what’s the best way to go about it in this environment? I’ve currently got it enabled on both servers but thinking about it won’t the clients only see the previous versions for the server they’re connecting to? Does DFS load balance the clients, so that one day client A will connect to Server A but the next day it could be Server B? In that case their previous versions would be split between the servers and they would never see all their previous versions in one place?

     

    Thanks

     

    Tuesday, September 27, 2011 8:24 AM

Answers

  • Hi,

    As you said, previous versions will not be replicated/sync with DFSR, so the version will be different on server A and server B.

    However as the snapshot creation should be started at same time and the content in DFS folders should be sync, the "previous version" should also be the same.

    And a workaround is to connect to the other server (manually with \\servername, or change the active target in DFS tab) to check for different version.


    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.
    Thursday, September 29, 2011 7:01 AM
  • Hi reck2,

     

    yes, the failback will make users miss the VSS versions on the failed back server. DFS and VSS are a nice solution, but not perfect. No real solution for this different copies.


    Thank you,

    F. Schubert
    System Administrator

    MCT | Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
    Wednesday, October 5, 2011 7:15 AM

All replies

  • Hi,

    As you said, previous versions will not be replicated/sync with DFSR, so the version will be different on server A and server B.

    However as the snapshot creation should be started at same time and the content in DFS folders should be sync, the "previous version" should also be the same.

    And a workaround is to connect to the other server (manually with \\servername, or change the active target in DFS tab) to check for different version.


    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.
    Thursday, September 29, 2011 7:01 AM
  • Hi,

    other workaround is to change the referral ordering and set the Primary (First among all targets) to Server A, for example, and the last among all targets to Server B. Then users will get Server A as primary referral unless Server A is unavailable.

    Give a look in the Step 8 from the Step by Step manual: http://technet.microsoft.com/en-us/library/cc732863%28WS.10%29.aspx

     


    Thank you,

    F. Schubert
    System Administrator

    MCT | Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
    Friday, September 30, 2011 10:26 AM
  • Thanks Shaon and CoffeineNerd.

    Shaon as you say as long as both servers are up and running both copies of previous versions should be the same and there would be no problem. What happens though if one of the servers is out of action for a few days and everyone is using the other server. Once the second server is back up and running it will be out of sync. But then I suppose the next time a snapshot is taken they will both be at the same point other than the second server will have some missing previous versions from when the server was down.

    CoffeineNerd  i'm not sure I see the benefit that changing the priority would have? If everyone was using server 1 and it went down for a couple of days, everyone would switch to server 2 for those couple of days and then return to server 1. If later someone wanted a previous version from that period of when server 1 was down they wouldn't find it because it would be on the other server.

    Tuesday, October 4, 2011 10:28 AM
  • Hi reck2,

     

    yes, the failback will make users miss the VSS versions on the failed back server. DFS and VSS are a nice solution, but not perfect. No real solution for this different copies.


    Thank you,

    F. Schubert
    System Administrator

    MCT | Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
    Wednesday, October 5, 2011 7:15 AM