I can't speak to AIX, I use Solaris but I just converted all of
my volumes from mounted, VXFS ones to RAW and the performance difference
has been huge. I converted one of my servers this past Saturday, I have
10 DB vols and 10 mirrors plus 1 large volume and a mirror. I started
expiration processing on Sunday and it has processed almost 14 million
objects since then. It would have taken 6 months or more of doing this
steadily to get the same amount completed. Also, I had many client
sessions that weren't completing each day do to having really large file
spaces (Solaris clients), they now complete normally each morning
instead of running all day.
I am using Solaris 8 on E4500 servers with 4 processors and 4 GB
RAM with TSM 5.1.8.1. I completed converting all of my servers this
past Tuesday and I have seen the same performance gains across the
board.
Michael French
Savvis Communications
IDS01 Santa Clara, CA
(408)450-7812 -- desk
(408)239-9913 -- mobile
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of
Gerhard Rentschler
Sent: Thursday, January 22, 2004 9:05 AM
To: [EMAIL PROTECTED]
Subject: Re: RAW vs. JFS question
I think the most interesting question is still unanswered: how much
performance do I gain with raw volumes? More exactly: how much less time
will an expiration take on a 100 GB TSM data base? I don't think raw
volumes would make sense for disk caches.
Does anyone have experience in this area?
Best regards
Gerhard
---
Gerhard Rentschler email:[EMAIL PROTECTED]
Regional Computing Center tel. ++49/711/685 5806
University of Stuttgart fax: ++49/711/682357
Allmandring 30a
D 70550
Stuttgart
Germany
