At 03:01 PM 1/22/2004 -0500, James Hunt wrote:

There are not any performance improvements when the TSM Recovery Log or
TSM Data Base is put on RAW volumes.

Moving from JFS to RAW (for DB and LOG vols) does in fact help performance
somewhat on larger systems.  On smaller systems which are not resource
constrained, it may in fact make no difference.  The code paths for JFS are
longer, and you are double buffering for TSM database pages, creating more
memory demand.

We run multiple TSM servers on the same box with RAW LVs.  We run the TSM
servers non-root, and chown the raw LV devices to the appropriate userid
for the owning TSM server.  This prevents one TSM server from overwriting
another's data at a very basic security level.

..Paul


--
Paul Zarnowski                         Ph: 607-255-4757
719 Rhodes Hall, Cornell University    Fx: 607-255-8521
Ithaca, NY 14853-3801                  Em: psz1 AT cornell DOT edu