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Backup/restore throughput

santave
Level 4

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,
 

1 ACCEPTED SOLUTION

Accepted Solutions

Nicolai
Moderator
Moderator
Partner    VIP   

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

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3 REPLIES 3

RamNagalla
Moderator
Moderator
Partner    VIP    Certified

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
Moderator
Moderator
Partner    VIP   

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
Level 6
Employee Accredited Certified

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.