Forum Discussion

rohitrathore's avatar
rohitrathore
Level 2
7 years ago

Deduplication pool

We have a master server and 3 media server in our enviornment all windows based. All media servers have a msdp configured (pure disk). On one of the pools we are running out of space. Can we increa...
  • Marianne's avatar
    Marianne
    7 years ago

    The max MSDP pool size on Windows is 64 TB.

    The NetBackup Deduplication Guide   explains under this topic : Resizing the MSDP storage partition how to increase pool size.
    In short - stop NBU on media server, use Array and OS tools to increase disk size, start NBU, then Inventory the disk pool in the GUI. 

    MSDP cleanup runs every 12 hours. 

    You can read in the same manual under this topic: Managing Media Server Deduplication Pools about 
    Deleting backup images and About the MSDP data removal process.

    There is another process called 'rebashing'. 
    Storage is only reclaimed during this process. 
    See: About MSDP storage rebasing

    Hopefully reading through these topics will answer your questions.

Marianne's avatar
Marianne
Level 6

Well, answer depend on:

Your NBU version.

OS on your media server.

Current size of the MSDP pool.

Always best to mention or select the OS and NBU version as max MSDP pool size is different for Windows and Unix/Linux and have changed across NBU versions.
MSDP technology (e.g. cleanup) has also changed across NBU versions.

As far as expiration is concerned - you may not be able to free up much space by expiring backups, as other backups may still depend on data in the image that you expire.

rohitrathore's avatar
rohitrathore
Level 2
7 years ago

Your NBU version. - 8 (Master server OS- Windows 2012)

OS on your media server. - Windows 2012

Current size of the MSDP pool. - 58 TB

  • Marianne's avatar
    Marianne
    Level 6
    7 years ago

    The max MSDP pool size on Windows is 64 TB.

    The NetBackup Deduplication Guide   explains under this topic : Resizing the MSDP storage partition how to increase pool size.
    In short - stop NBU on media server, use Array and OS tools to increase disk size, start NBU, then Inventory the disk pool in the GUI. 

    MSDP cleanup runs every 12 hours. 

    You can read in the same manual under this topic: Managing Media Server Deduplication Pools about 
    Deleting backup images and About the MSDP data removal process.

    There is another process called 'rebashing'. 
    Storage is only reclaimed during this process. 
    See: About MSDP storage rebasing

    Hopefully reading through these topics will answer your questions.