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Slow restore using Netbackup

Created: 24 Mar 2009 • Updated: 22 May 2010 | 4 comments
Anth105's picture

Hi,

I am experiencing a very slow restore performance ( 25MB) during the restore using Netbackup: here is the env description

Master AIX 5.x    NBU  6.5.2
Media server  Win2k SP2    NBU 6.5.2
Client               Win2k             NBU 5.1 MP

Amount of  data to be restored :  35GB

the restore has been running for nearly 1 day and 4hours. This is ridicules to take such time to restore 35 GB worth of data and still carry on.  

I checked the network connections, and they are running at 100 Full on the  client box, and 1000/Full on the Win2k  Netbackup Server.  The tape drives are LTO3 drives.  

It appears  after further analysis of the bpbrm and bptm logs files that the restore "hangs" on a specific directory which I noticed that it  takes a considerable amount of time to expand it through window Explorer.

At this stage I am not sure its a netbackup related issue or an OS.

Any help will be much appreciated

Many thanks

Antony

Comments 4 CommentsJump to latest comment

Rakesh Khandelwal's picture

Do you know how long it took for backup? Restore usually takes longer than backup.
You may want  to look at  the multiplexing number you used for the backup.
Other than these, check for the buffer settings if these are still same as these were at the time of backup.

Marek Kedzierski's picture

Backup planning and performance guide
ftp://exftpp.symantec.com/pub/support/products/Net...

You should to set:
1. NUMBER_DATA_BUFFERS
2. NUMBER_DATA_BUFFERS_RESTORE
3. SIZE_DATA_BUFFERS

You can try with this (one media server):
1. 64
2. 64
4. 65536

Anth105's picture

thank you all for the suggestions.

These settings are already  on all the media servers.