That slow of a throughput is usually caused by factors other than
tuning.  How are your tape drives configured in your st.conf?  Make sure
you use the recommended settings and have hardware compression enabled.
Also, check your network for packet loss and verify that your network
settings are correct.   

I would also take netbackup out of the picture and use "dd" to send some
raw data to the drives and check the throughput(kw/s) through "iostat
-cxnp | grep rmt".

I would work down from there to your final tuning for /etc/system and
network buffer size, number of data buffers, etc...etc..


Regards,
Charles Harris

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Dave
Markham
Sent: Wednesday, October 26, 2005 4:43 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] system settings and tuning

I have used the settings described here previously:-

http://seer.support.veritas.com/docs/183702.htm

And solaris tuning settings in /etc/system from a performance tuning 
guide but they all seem to be a bit dated and i was wondering had anyone

any more up to date info for performance increasing?

I have just set up a Solaris 9 netbackup 5.0MP5 with an L25 and two LTO2

drives.  Im only getting 5meg/sec on a backup test but have done no
tuning.

With servers getting better ( this is a v240 ) i was wondering were 
there hight /etc/system settings and other tuning parameters for NBU

Any help would be great

Cheers
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