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 [EMAIL PROTECTED]
