We do state in our performance and tuning guide that either the
Veritas Quick I/O product or using RAW volumes will improve TSM performance
over using UFS volumes. In our lab tests however, RAW still out-performs
Veritas Quick I/O. Our primary recommendation is still to use RAW if you
can, otherwise use Veritas Quick I/O. We do NOT  recommend UFS for the
filesystem type for the Sun Solaris platform due to the filesystem overhead
for any of the TSM related files.


At 09:19 AM 2/7/2004 -0500, you wrote:

>We are running TSM V5.2.2.1 for Solaris on a Solaris 2.8 server. I am
>not a Unix admin. The Unix support team loaded and licensed Veritas
>Quick I/O. According to the TSM Performance tuning guide you either want
>to use Quick I/O or RAW volumes when defining DB, LOG, or Disk pool
>volumes on Solaris. Because our Oracle Administrators use Quick I/O we
>decided to use it on our TSM server. I was under the assumption that all
>you have to do is install Quick I/O and everything will be faster.

Hey, no assuming in systems work!  ;-)
At  eval.veritas.com/downloads/pro/qiowp.pdf  you will find an excellent
presentation on Veritas Quick I/O...an intriguing combination of raw volume
speed and conventional file system manageability.  I just went through that
PDF to learn what Quick I/O is all about.  The Best Practices section of
that doc points out special things you must do to have Quick I/O active,
and I'm sure that its manual goes into a lot more detail.
When dealing with specialized "solutions" such as this, there are always
particulars which have to be observed, and limits on applicability.  I
think your site has to pursue further details.  Post back if this approach
ultimately yields the promised goals of high performance and excellent
manageability.

   Richard Sims,  http://people.bu.edu/rbs

Dave Canan
TSM Performance
IBM Advanced Technical Support
ddcanan AT us.ibm DOT com