Multi Streams Synthfull VSA / AuxCopy

Last post 07-29-2019, 7:56 AM by Wwong. 9 replies.
Sort Posts: Previous Next
  • Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-17-2019, 5:52 AM

    Hi All,

     

    we are discussing an problem with one of our customer. he has an 20Tb big Virtual Server with severeals .vmdk files. the incr Backup is working fine and we get an high Dedup ratio. 

     

    Also the Synthfull is running okay but after we need to copy it to tape we went in performance issue. Only i single vm with an single stream is to slow we only see 500GB/h troughput in the auxcopy. 

     

    i see that with VSA V2 Multi streams für VSA with synthfull is possible but it did not help us i gues because: "A single VM backup does not use multiple streams." ( https://documentation.commvault.com/commvault/v11_sp16/article?p=102092.htm ) 

     

    So did you see any possibility to get more speed for the auxcopy ? 

     

    thanks

     

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-18-2019, 12:55 PM

    Edited

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-18-2019, 12:55 PM

    Hi Smithse, 

     

    Same problem here we have aux copy to remote localization, and our aux copy for synthfull backup is using only one stream. 

    We are going to divide synthfull backup manually aranging backup by groups of VMs, but this is not elegant and not flexible (new machine should be manually added, balancing the size of machines, etc). 

     

    Regards 

    Wojtek

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-22-2019, 6:00 PM

    Hi smithse 

    The use of VSA V2 Multi streams will definitely help here, as the Backup will be VM-centric, each VM will have it's own associated Job ID (when triggered with the Parent Synthetic Full Job). 

    As a result of separate jobs for each VM, when doing Aux Copy you will be able to leverage multi-stream, rather then waiting on a single stream

    Regards

    Winston 

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-23-2019, 2:29 AM

    Hi,

     

    in our Case we had a single vm with 25.vmdk files and the vm has 15TB Size. We had created a new vcenter client and testet with multi streams ( in our lab with a single vm with 5 vmdks. ). When you have an subclient with only 1 Big vm with a lot of vmdk the backup is using multi streams but the synth full after not. I was thinking its like an big windows fileserver with multi partitions but isnt.

     

    This is also the same what i found in the books:

    https://documentation.commvault.com/commvault/v11_sp15/article?p=102092.htm

     

    When multi-stream synthetic full backups are enabled, each VM can use a separate stream. A single VM backup does not use multiple streams.

     

    So for an single vm with a lot of big vmdk files it doesnt help.

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-23-2019, 9:33 AM

    Hi Smithse 

    Thanks for the update 

    You are definitely correct, unfortunately with your current situation (multi-stream) will not be helpful, due the single big VM. 

    In situation where you have very large vmdk, have you considered using VSA intellisnap (and leverage hardware snaps) - https://documentation.commvault.com/commvault/v11/article?p=62326.htm?

    Regards

    Winston 

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-23-2019, 10:30 AM

    Hi,

     

    yes intellisnap could be an option wer are now testing an normal full backup of this vm. Maybe the duration for an Full VSA Backup 2 Disk is okay if yes we are getting multi streams afterwards for the auxcopy

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-25-2019, 8:45 AM

    Hi Smithse

    Thanks for the update

    Keep us posted on how the  Full VSA Backup 2 Disk (using V2 Index) goes. If it does back it up in a timely manner, the Aux Copy will definitely benefit from the additional mutli-stream

    Regards

    Winston

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-29-2019, 2:09 AM

    Hi,

    Thank you guys. Changing to  V2 Index solved my problem, hope that for Smithse also. 

     

    Regards Wojtek

  • Re: Multi Streams Synthfull VSA / AuxCopy
    Posted: 07-29-2019, 7:56 AM

    Hi Wojtek 

    Great to know V2 Indexing helped here 

    Regards

    Winston 

The content of the forums, threads and posts reflects the thoughts and opinions of each author, and does not represent the thoughts, opinions, plans or strategies of Commvault Systems, Inc. ("Commvault") and Commvault undertakes no obligation to update, correct or modify any statements made in this forum. Any and all third party links, statements, comments, or feedback posted to, or otherwise provided by this forum, thread or post are not affiliated with, nor endorsed by, Commvault.
Commvault, Commvault and logo, the “CV” logo, Commvault Systems, Solving Forward, SIM, Singular Information Management, Simpana, Commvault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, CommNet, GridStor, Vault Tracker, InnerVault, QuickSnap, QSnap, Recovery Director, CommServe, CommCell, SnapProtect, ROMS, and CommValue, are trademarks or registered trademarks of Commvault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.
Close
Copyright © 2019 Commvault | All Rights Reserved. | Legal | Privacy Policy