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Deduplication pool

rohitrathore
Level 2

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 increase the space of the pool ?

How can we check if cleaning is working properly or not?

How to manually expire images that are old to retain some space?

 

1 ACCEPTED SOLUTION

Accepted Solutions

Marianne
Moderator
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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.

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3 REPLIES 3

Marianne
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Partner    VIP    Accredited Certified

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.

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
Moderator
Moderator
Partner    VIP    Accredited Certified

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.