ADSM-L

db/log allocation

2001-10-11 14:52:35
Subject: db/log allocation
From: Gerald Wichmann <gwichmann AT SANSIA DOT COM>
Date: Thu, 11 Oct 2001 11:50:43 -0700
I have a system that will have 2 36GB SSA disks and 2 9.1 SSA disks for
use to store my TSM DB/log. Now in the interest of performance, whats
the best way to carve this up? Obviously I will employ TSM mirroring so
that leaves me one of each drive. Would it be better to create two
RAID-0 arrays and store my DB/log on one, mirroring it to the other in
the interest of performance so that the TSM server reads/writes the data
to both drives in parallel (striping)? Or would it be better to create a
filesystem on one drive, and another filesystem on the other, then
create my db/log volumes on both in some way so that TSM reads/writes to
both drives at the same time?

I guess what I'm asking is I'm not entirely clear on how TSM
reads/writes to the db/log volumes when it's doing backups/restores and
I need to understand this in order to understand how to best carve up
these disks.

Thanks for the help :-)

Gerald Wichmann
System Engineer
StorageLink
408-844-8893 (v)
408-844-9801 (f)
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