Dash Copy large data transfer using minimum bandwith

Last post 05-19-2015, 8:21 AM by Sajid Attar. 2 replies.
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  • Dash Copy large data transfer using minimum bandwith
    Posted: 05-18-2015, 10:14 AM

    Hi ,

    Please help on below quires


      Remote Location : 2 no’s SQL servers configure disk library, storage policy, schedule policy daily incremental and weekly full backup

    Datacenter: configure storage library and tertiary copy for seeding

    Internet  Bandwidth : 1 Mbps


    Configured dash copy schedule daily and seedind for first time Full backup between datacenter and remote location


    On client side daily incremental backup size 500 MB will dash copy sync completed between remote locatoion and datacenter




    1. when we take full backup size is 500 GB with debug how to sync between remote and datacenter location using dash in minimum time

          2. How to calculate bandwith requirement for  FS backup and dash copy and  SQL backup and dash copy

          3. How to calculate bandwith requirement for CDR 

          4. Can we copy disk library location data path folder from remote location to datacenter disk library            location   and assign or map to new created disk library & storage policy for to recover the data

    If any clarification pleasse let us know






  • Re: Dash Copy large data transfer using minimum bandwith
    Posted: 05-18-2015, 10:04 PM
    Hi Sajid, Answers: 1. Using DASH copy will be the quickest method of syncing your remote location on site backups to your datacenter. Once the data from remote location is seeded in DC, use the Disk Read Optimized DASH copy setting to get the best throughput, then regularly verify your backups 2. The DASH copy requirement for FS vs SQL would not be any different. It comes down to how many blocks have changed for that particular backup. The backup difference would usually mean that you do not want to use compression for SQL backups so that you get the best dedupe saving. The more dedupe saving you achieve, the faster the DASH copy can run. Cannot calculate bandwidth requirement for you as the amount of unique blocks (changes) that needs to be transferred to DC location would vary each day. 3. CDR replicates your data without dedupe so the bandwidth requirement would equal the size of your data / time window to replicate 4. You can technically take the disk backup location from remote location and use it for restore but there is some configuration steps required in CV so please raise a Support incident to assist you with this if required. Thank you
  • Re: Dash Copy large data transfer using minimum bandwith
    Posted: 05-19-2015, 8:21 AM

    Thanks  jordanxu,

    3 and 4 i am ok thanks a lot 


    please help me on below point


    1. Can we using synthetic full backup concept for dash copy sync but there is no option 

    Dash copy will be Daily incremental backup  sync and that incremental backup will merge using synthetic full backup  that time dash copy will not sync or replicate. only sync for incremental backup

     Please  guide  me for to configure synthetic full backup for dash copy


    2. Can yuo share bandwith Calculater for dash copy sync and Commvault CDR


    Thanks and Regards


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