How can i check if DFS-R is working?

Discussion in 'File Systems' started by Pavlos Gerardos, Aug 21, 2009.

  1. I prestaged 2 servers with the data i wanted to copy from a NAS (which
    is to be removed from the network).
    It's ~750GB of data.
    One copy was made to Srv1 with robocopy and the other (to Srv2) was made
    one day earlier with simple windows copy...
    There is a difference of ~1GB of data (~1000 files).

    The primary server should be Srv1, which holds the most up-to-date and
    full data.

    I created a replication group for the two folder targets some 6 hours
    ago and then made 4-5 health reports.

    All of them show a warning for Srv2 that "This member is waiting for
    initial replication for replicated folder data".
    In the following lines i can see now ~400000 Backlogged Sending &
    Receiving Transactions and ~53000 Files Received...
    And these numbers are increasing hour to hour...

    It's definitely not working ok....

    Any ideas on what should i do?

    Thanks in advance...
     
    Pavlos Gerardos, Aug 21, 2009
    #1
    1. Advertisements

  2. Pavlos Gerardos

    Dave Warren Guest

    In message <> Pavlos Gerardos
    Wait.

    Since you copied the data using different methods, not all of the
    meta-data will be identical, since the meta-data isn't identical, the
    file hashes don't line up exactly, so DFS-R goes through conflict
    resolution.

    It will take DFS-R some time to resolve the conflicts. DFS-R is smart
    enough to notice that the content itself is identical though, so it will
    generally be faster then just letting DFS-R copy out all the files
    itself.

    Under 2003 R2 it could take days for the two servers to sync up with
    750GB of data, under 2008 I'd expect DFS-R to finish in a day or so
    assuming the file content is identical, longer if the file content needs
    to be replicated. User activity will slow the process considerably.

    Check your staging areas sizes, I'd probably bump them to at least 16GB
    during the initial sync (especially on 2008, which handles larger
    staging areas more efficiently then 2003 did), then set them to more
    sane limits later.

    Honestly though, the initial replication just takes time, little can be
    done to speed it up, and whatever you do, don't try and help it along
    once replication starts, you'll just generate more work for the system
    trying to resolve your changes.
     
    Dave Warren, Aug 22, 2009
    #2
    1. Advertisements

  3. Thank you Dave for the very helpful reply.

    You were right about the time it would take to sync the files.

    It eventually finished yesterday noon, after almost 24hours.

    The main problem for me remains though:
    There is no serious level monitoring regarding the initial replication
    status, so you can't be sure if everything works ok.
    I just had to wait for a whole day without even knowing if i had to
    restart or stop or do something else...

    I really think MS should do some serious work on this issue.

    Anyways, thanks again for helping me out.

    Pavlos
     
    Pavlos Gerardos, Aug 23, 2009
    #3

  4. Thank you Dave for the very helpful reply.

    You were right about the time it would take to sync the files.

    It eventually finished yesterday noon, after almost 24hours.

    The main problem for me remains though:
    There is no serious level monitoring regarding the initial replication
    status, so you can't be sure if everything works ok.
    I just had to wait for a whole day without even knowing if i had to
    restart or stop or do something else...

    I really think MS should do some serious work on this issue.

    Anyways, thanks again for helping out.

    Pavlos
     
    Pavlos Gerardos, Aug 23, 2009
    #4
  5. Thank you Dave for the very helpful reply.

    You were right about the time it would take to sync the files.

    It eventually finished yesterday noon, after almost 24hours.

    The main problem for me remains though:
    There is no serious level monitoring regarding the initial replication
    status, so you can't be sure if everything works ok.
    I just had to wait for a whole day without even knowing if i had to
    restart or stop or do something else...

    I really think MS should do some serious work on this issue.

    Anyways, thanks again for helping out.

    Pavlos
     
    Pavlos Gerardos, Aug 23, 2009
    #5
  6. Thank you Dave for the very helpful reply.

    You were right about the time it would take to sync the files.

    It eventually finished after almost 24hours.

    The main problem for me remains though:
    There is no serious level monitoring regarding the initial replication
    status, so you can't be sure if everything works ok.
    I just had to wait for a whole day without even knowing if i had to
    restart or stop or do something else...

    I really think MS should do some serious work on this issue.

    Anyways, thanks again for helping out.

    Pavlos
     
    Pavlos Gerardos, Aug 24, 2009
    #6
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.