You can also run bpkar32 to see how fast the Netbackup executable can
read the data off your disks.  This will eliminate the whole network /
media server versus local bottleneck argument.
 
http://seer.entsupport.symantec.com/docs/242918.htm
 
-Jonathan

________________________________

From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Dave
Sent: Monday, September 11, 2006 12:09 PM
To: 'Ganapathy G'; veritas-bu at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Netbackup 6.0 Performance Very Slow



G. 

 

If this is all SAN attached i.e. the disk is on the SAN attached to the
Media Server and the LTO3 are on the SAN and attached to the Media
Server, you should be seeing single stream performance of at least
15MB/sec at the minimum. 

 

Since you are only seeing 6MB/sec that sounds more like you are on
100Mbit LAN connection trying to back up to the LTO3 drives but I may be
wrong. 

 

You can try using multiple streams of data but that may or may not help
depending on how the disk was laid out. You could end up overloading the
disk controllers if you set up too many streams on a partition that is
only comprised of 2 or 3 drives. 

 

Performance tuning (increasing buffers and sizes) can give you about 10%
better back up speed, but if you are only getting 6MB/sec then something
is seriously wrong with your hardware strategy. Also, you don't mention
if this is Windows or Unix. This can affect your speed as well (Windows
is traditionally slower per stream) but even with Windows you should be
getting 15 - 20MB/sec per stream if your hardware will support it. 

 

Cheers, 

 

d. 

 

 

 

________________________________

From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of
Ganapathy G
Sent: Monday, September 11, 2006 4:34 AM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Netbackup 6.0 Performance Very Slow

 

Recently I Installed Netbackup 6.0 MP3 in our environment with the
following architecture.  1 Master Server and 2  Media Server. I am
taking file server backup

of Mapped Drive of SAN with 730 GB of Data. This is the same server in
which Media Server is attached . I am having LTO 3 Robotic Library with
28 Slots (HP MSP 6000 Model). The Backup takes 30 Hours to finish entire
730GB at 7000 KB/ Sec (6MB/Sec)  of data and i tried all the performance
tuning mentioned in Netbackup guide.  Nothing worked. Anybody does the
tuning and any suggestion to reduce my backup windows 

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