Can CDR be a replacement for DFSR?

Last post 10-14-2019, 9:51 AM by vagrawal. 7 replies.
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  • Can CDR be a replacement for DFSR?
    Posted: 10-09-2019, 11:23 AM

    Hello,

    I'm being told by Commvault support that CDR isn't a bidirectional solution. (i.e., data at the target isn't replicated back to the source)  However, the documentation sort of implies that it is.

    http://documentation.commvault.com/commvault/v11/article?p=37620.htm

    Can someone please confirm with certainty whether or not CDR is bidrectional and can be used as a DFSR replacement?  Ideally, we're looking to maintain 2 different sites, each of which will be getting accessed by customers and thus the 2-way sync would be needed.

    Thanks,

    - Bill

     

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-10-2019, 11:44 AM

    Hi Billy,

    NO, CDR is not replacement to DFSR. what that document means is that after you backup modified destination data, that you can restore to Source from backup media. We dont support reverse replication.

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 8:58 AM

    Hello Vijay,

    I also noticed that replication with CDR is not immediate as it is with DFSR.  For example, I can touch a file on the source and it may take 5-10 minutes for the file to replicate.  Is this expected behavior? 

    Thanks,

    - Bill

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 9:28 AM

    Hi Bill,

     That really depends on the amount of changes done on the source. we ship logs 5MB worth of changes or every 2 mins. that get applied on destination in next 2 mins. so if the changes are very minimal then it would take about ~5 mins.

     

    Vijay

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 9:33 AM

    Thanks Vijay.  So this is expected behavior and there are no settings that would cause the changes to be replicated almost immediately, such as with DFSR?

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 9:37 AM

    unfortunately No. There is no setting to mimic DFSR

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 9:47 AM

    So approximately 5mb every 2 minutes is about the fastest rate of replication that you can expect to get?  Thank you.

  • Re: Can CDR be a replacement for DFSR?
    Posted: 10-14-2019, 9:51 AM

    No no :) 5MB is log size. if we fill up 5MB worth of change we replicate that immediately. if there are no changes happening on source machine, then every 2 mins we ship whatever is recorded in the last 2 mins and apply changes on destination. 

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