Replicating Exchange DBs - Space Issues

Last post 08-07-2012, 4:23 PM by Stupek. 1 replies.
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  • Replicating Exchange DBs - Space Issues
    Posted: 08-02-2012, 5:24 PM

    Good Evening,

    We are currentky replicating Exchange DBs using CDR, I am also a little bit concerned about where space has gone across all the drives, this seems to be a fair amount . 

    As you can see below we run a space check on all the servers everyday and you can see yourself that after moving these 8GB logs we have still lost space on the C drive and have a vast decrease in free space on all the drives.  The EDBS are the same size so what is taking up this space.

    I reckon it could VSS that could be causing the space issues?

     

    From the sizes below is there anyway to calculate the replication log sizes as they grow very quickly?

     

    THIS MORNING BEFORE CDR CHANGES

    Available space on srv-mail-101\C$

                  12 Dir(s)  19,124,744,192 bytes free

    ---------------------------------

    Available space on srv-mail-101\E$

                   4 Dir(s)  90,934,083,584 bytes free

    ---------------------------------

    Available space on srv-mail-101\F$

                   1 Dir(s)  27,447,087,104 bytes free

    ---------------------------------

    Available space on srv-mail-101\L$

                   1 Dir(s)  85,214,867,456 bytes free

     

     

     

    THIS AFTERNOON AFTER CDR CHANGES AND THE MOVIING OF TH 8GB REPLICATION LOG FILES TO ANOTHER DRIVE

     

    Available space on srv-mail-101\C$

                  12 Dir(s)  13,746,728,960 bytes free

    ---------------------------------

    Available space on srv-mail-101\E$

                   4 Dir(s)  84,467,605,504 bytes free

    ---------------------------------

    Available space on srv-mail-101\F$

                   1 Dir(s)  19,652,104,192 bytes free

    ---------------------------------

    Available space on srv-mail-101\L$

                   1 Dir(s)  72,518,967,296 bytes free

     

     

    Any feedback would be greatly appreciated.

     

    Regards

    Scott

  • Re: Replicating Exchange DBs - Space Issues
    Posted: 08-07-2012, 4:23 PM

    smckvey

    With CDR we do utilize VSS to snap the volumes to ensure that we can Replicate any open or locked files.  With Exchange Replication we will utilize VSS to ensure that we are getting all changes to the DB during the replication.   Once the pairs are in Repliating they will start to use the CDR logs for data transfer. 

    To see how much space the Replication logs will consume you can use the Replication Prediction tool.

    Replication Prediction

    http://documentation.commvault.com/commvault/release_9_0_0/books_online_1/english_us/features/data_replication/data_replication.htm#Replication Prediction

    Perform Replication Prediction

    http://documentation.commvault.com/commvault/release_9_0_0/books_online_1/english_us/features/data_replication/data_replication_how_to.htm#predictor

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