The documentation still needs to be update to reflect this information.

At 09:19 AM 2/17/2003 +0100, you wrote:

How about setting diskmap to yes. I think this is lowers the IOwait alot.

-----------------------------------
Christian Pallinder
Exist i Stockholm AB
Propellervägen 6B
183 62 Täby
Mobil: +46 (0)70 - 399 27 58




Paul Ripke <stixpjr AT BIGPOND.NET DOT AU>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2003-02-14 12:30
Please respond to "ADSM: Dist Stor Manager"

        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Re: improving performance on solaris 2.8


We found a similar improvement moving dbvols, logvols and disk storage
pool volumes to VXVM raw devices - running both Solaris 7 and Solaris 8.

On Friday, Feb 14, 2003, at 03:13 Australia/Sydney, Lee, Gary D. wrote:

> We have tsm server 4.2.1 running under solaris 2.8 on a sun 3500.
>
> Had plenty of memory (2gb) and a reasonable amount of disk.  However,
> performance even with a gigabit ethernet was less than adequate.
>
> Acting on a couple of replies received from this list, I modified the
> vfstab and changed the database, log, and stgpool file systems to
> "forcedirectio".
>
> Throughput went up by a factor of five or more for almost all clients.
>  Clients with backups of a few large files, showed an increase of
> fifteen times throughput.
>
> Thought this info might help someone.
>
>
> Gary Lee
> Senior Operating Systems Analyst
> Ball State University
> phone 765-285-1310
>
>
>
--
Paul Ripke
Unix/OpenVMS/TSM/DBA
101 reasons why you can't find your Sysadmin:
68: It's 9AM. He/She is not working that late.
-- Koos van den Hout

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