CDR on a VM File Server

Last post 09-20-2010, 12:29 PM by Vincenzo_Basolino. 3 replies.
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  • CDR on a VM File Server
    Posted: 09-14-2010, 12:32 AM

    I have a file server that's having all sorts of issues with traditional backup - due to the size of the data and the small amount of bandwidth i have to use to back it up.  I usually try for sythetic full backups but that's been failing quite a bit or running overtime. its about 40gb of data and a 4mb link (bdsl i think)

    The file server in question is a VM configured with 3 drives - System ,data and VSS. 

    To install CDR i'd be best off to create a fourth drive and install cdr on that to monitor the data drive right?...

    Do i need any other commvault software on it? like the files agent as well?

  • Re: CDR on a VM File Server
    Posted: 09-14-2010, 10:55 AM

    A more lightweight solution like DDR might be a better option here.  This will allow you to function with the volumes present on the machine to minimize the impact both from the hardware resource aspect and machine/link as a whole

    http://documentation.commvault.com/commvault/release_8_0_0/books_online_1/english_us/features/ddr/ddr.htm

     

  • Re: CDR on a VM File Server
    Posted: 09-20-2010, 12:44 AM

    Ok - i've set up and experimented with CDR .  

     

    Continuous replication works ok - updates the target end every 15 minutes or 5mb i think and seems to work ok.

     

    When i change the replication pair to a backup copy I couldn't really make sense of what was  going on. Sometimes the logs on the target were 5 ahead of the source.  Can someone explain the steps the backup version of cdr uses?

     

    It looks like it stays static to me until you either schedule a checkpoint or backup and then it updates the target. Basically like a synthetic full right?

  • Re: CDR on a VM File Server
    Posted: 09-20-2010, 12:29 PM

    DDR will use its own journal based on the USNs within windows change journal.  When you run the job it knows the starting point based on the last USN. 

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