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Replica Creation speed and compression over DirectAccess RRS feed

  • Question

  • Replica creation speed over DirectAcess averages about 1.5 mbps, which is consistent with the upload bandwith of the Internet connection at the protected server.  Enabling on-the-wire compression has no effect.  Is this as expected?

    The type of data in one case is and Exchange 2010 mailbox database, in another case it is a SQL Server 2008 database.

    Wednesday, June 2, 2010 1:47 PM

Answers

  • Hey Sejong,

    What I think is that the speed will remain the same, but with Compression on the Wire, you will have less to transfer.

    Makes sense?

    Cheers,

    Mike Resseler


    Visit System Center User Group Belgium @ http://scug.be and http://scug.be/blogs/scdpm
    Friday, June 4, 2010 4:04 PM
    Moderator
  • I'm thinking that DPM Agents will still going report the "data transfered" to be the uncompressed size, the only way to see real benefit of compression is to time how long it takes to transfer the same data as both compressed and uncompressed in a controlled network environment.
    Regards, Mike J [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, June 4, 2010 5:25 PM
    Moderator

All replies

  • Hey Sejong,

    What I think is that the speed will remain the same, but with Compression on the Wire, you will have less to transfer.

    Makes sense?

    Cheers,

    Mike Resseler


    Visit System Center User Group Belgium @ http://scug.be and http://scug.be/blogs/scdpm
    Friday, June 4, 2010 4:04 PM
    Moderator
  • Yes.  It makes a lot of sense.  After a replica creation process underway right now completes, I'll compare the amount of data transferred with the data size of the protection group to confirm.
    Friday, June 4, 2010 5:17 PM
  • I'm thinking that DPM Agents will still going report the "data transfered" to be the uncompressed size, the only way to see real benefit of compression is to time how long it takes to transfer the same data as both compressed and uncompressed in a controlled network environment.
    Regards, Mike J [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, June 4, 2010 5:25 PM
    Moderator
  • @ Mike J

    I think you are correct.  On the Monitoring tab in the DPM console, I created a filter that shows all the competed replicas created.  "Data transferred" is about the same as "Data size" as shown on the Modify Disk Allocation dialog in the Create Protection Group Wizard.

    Saturday, June 5, 2010 6:26 PM