Is it possible to have a DDB refer to a deduplicated storage system?

Last post 08-04-2019, 9:13 AM by Wwong. 5 replies.
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  • Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-01-2019, 12:00 PM

    We are currently backing up to a Data Domain without using CommVault's deduplocation.  Would it be possible to use deduped storage policies pointint to the Data Domain since it does its own deduplication?

  • Re: Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-01-2019, 3:15 PM

    It is possible, in that it should work, but you would jus be storing deduped blocks on a Deddupe array.  Your deduped array will not likely get any additional dedupe since it will be storing unique blocks.

    I would advise against it.

  • Re: Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-01-2019, 3:19 PM
    • Aplynx is not online. Last active: 10-18-2019, 2:25 PM Liam
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    Have to choose one or the other. Nothing is gained using both. 

  • Re: Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-01-2019, 4:06 PM

    OK.  I wasn't expecting more dedupe because we really don't have space for long term storage on the Data Domain..  The problem I am running into is we backup a lot of large BAK files and our Data Domain is 97% full most of the time. The cleanup process on the data domain to dedupe the data takes over 24 hours to run. 

    I was thinking if we could dedupe before sending it to disk it wouldn't fill up as much disk space while waiting to process the dedupe and/or offload to tape.

  • Re: Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-02-2019, 7:18 AM

    Yeah, you can't leaverage the commvault depuplication on client technology if you are sending it to a CV Storage Policy on a DD as you will not be using CV deduplication on that library.  Source Deduplication technology has to match the destination technology.

    You may get some benefit from client compression, but I cannot confirm this.

  • Re: Is it possible to have a DDB refer to a deduplicated storage system?
    Posted: 08-04-2019, 9:13 AM

    Hi HubJason 

    If the concern is with the Data Domain internal Deduplication, have you consider using the CIFs/NFS capability on the Data Domain and just convert to CommVault Deduplication?

    Commvault Deduplication allows you to control Data Aging and Physical Pruning at a more granular level, and with feature such as Data Verification Reclaim Idle Space, you can also manually clean up space if capacity becomes a concern. 

    Note - when using Commvault Deduplication for optimal performance it would be recommended to have local SSD Disk for the Deduped volume. 

    Regards

    Winston 

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