I run my TSM servers on Solaris 8. I use raw volumes built with Solstice
DiskSuite (Solaris Volume Manager in Solaris 9). When I first brought TSM up
on Solaris I put my db, logs and disk pools on UFS with logging and the
performance was awful. Solaris 8 UFS is actually quite fast for most
applications so I was rather surprised at the performance problem. I've
never tried TSM using VxFS, I saw no need to. The performance with raw
volumes is very good.

JFS is not native to Solaris, and I don't know of any way to use JFS on
Solaris. If you want a journalled file system use VxFS or UFS with logging.
With the improvements in DiskSuite I really can't see much reason to use
Veritas. It's costly and for most environments only gives minimal
performance improvements.

Eric Cowperthwaite
EDS Operations Solutions

> -----Original Message-----
> From: Arni Snorri Eggertsson [mailto:arnie AT GORMUR DOT COM]
> Sent: Saturday, September 21, 2002 12:04 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: RAW volumes or not
>
>
> Hiya,
>
> I've been reading about using RAW volumes for database and
> diskpool volumes, my impression is that when running AIX and
> using JFS the benefits are trivial. However I've seen people
> talking about 200-300% performance increase when running TSM
> on Solaris.
>
> What I am wondering is if anyone has actually done
> experiments with this on AIX on a real environment, i.e.
> performance check using JFS on one hand and then RAW volumes
> on the other?
>
>
>
> thanks,
> Arni Snorri Eggertsson
> arnie AT gormur DOT com
>