Steve,

     Our experience with all ADSM disk volumes is that when vxfs is used on
a single physical volume   performance degrades by ~10 percent, but when
used  to stripe, or create a larger logical partition across multiple
physical disks, various (fair to very good) performance improvements have
been seen.  It seems that configuring and tuning vxfs can require a fair
amount of study.
     In most customer situations where vxfs has been used, very frequently
a Sun SE that specializes in the Veritas volume manager would do the
configuration and tuning.

Thanks...Jim Riehl
Tivioli-ADSM Sun Server Development



Steven P Roder <tkssteve AT REXX.ACSU.BUFFALO DOT EDU> on 02/04/99 04:16:50 AM

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: James Riehl/Tucson/IBM)
Subject:  Re: Solaris Performance





On Wed, 3 Feb 1999, James Riehl wrote:
>  Malkit,
>
>      Try setting, in dsmserv.opt,  DISKMAP NO.  This setting can improve
> performance with larger disk pools and with some disk sub-systems. To get
> the best disk storage pool performance on Sun, we recommend using the
> raw-partitions (see the reference manual or the help on "define vol" and
> the notes on the disk device class).

Jim,

     Do you have any performance data when the ADSM database are under a
filesystem such as Veritas' vxfs?  We are leaning toward doing that
here...

Thanks,

Steve (unVMix Systems Programmer/Dude) Roder
(tkssteve AT ubvm.cc.buffalo DOT edu | tkssteve AT acsu.buffalo DOT edu | 
(716)645-3564 ,
   | http://ubvm.cc.buffalo.edu/~tkssteve)