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santave's avatar
santave
Level 4
11 years ago

Backup/restore throughput

Hi,

I have Master, Media and Client : Linux RedHat 6.1 , nbu 7.5.0.6
Tape Library with LT06 media and drives.
Mater-Media-Client connected on 10Gb Lan, Master-Tape Library connetected on SAN switch with 8Gb speed.
Backup Policy configured with 4 multiplexing.

I get backup throughput at 140Mbps but when doing restore I only get 10-13Mbps.
This is very less throughput .

Please suggest, How to check where is the bottleneck and how to improve it?

Thanks,
 

7.5
Backing Up
Backup and Recovery
Linux
NetBackup
Performance
Restore
  • Nicolai's avatar
    Nicolai
    11 years ago

    Try to to configure NUMBER_DATA_BUFFERS_RESTORE in /usr/openv/netbackup/db/config on the media server.

    Put 512 or larger in the file. 

    See : http://www.mass.dk/netbackup/guides/49-netbackup-buffer-tuning.html

3 Replies

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  • RamNagalla's avatar
    RamNagalla
    Moderator
    11 years ago

    its expected behaivor that the mulitplexed images have the less thoughput at the time of Restores..

    inorder to confirm this... take the same data backup without Mulitplexing and try the restore and see how its giving the thoughput.. 

    that will confirm the if the Mulitplexing is the bottleneck or not... 

    do make sure that you use the same data for backup and restore with & without mulitplexing for test.

  • Nicolai's avatar
    Nicolai
    Moderator
    11 years ago

    Try to to configure NUMBER_DATA_BUFFERS_RESTORE in /usr/openv/netbackup/db/config on the media server.

    Put 512 or larger in the file. 

    See : http://www.mass.dk/netbackup/guides/49-netbackup-buffer-tuning.html

  • Deb_Wilmot's avatar
    Deb_Wilmot
    Level 6
    11 years ago

    In addition to the above, copy a file to/from the storage manually.  Maybe there is something limiting on the SAN switch.  That would take nbu out of the picture.