We tested a TSM environment on both RAID5 and JBOD. Raid 5 performance for
diskpool/database and/or log was far worse than the JBOD config. At the
moment we are moving our big clients off the NSM (RAID5) to the WINtel JBOD.
Just because of the RAID performance.

-----Oorspronkelijk bericht-----
Van: Farren Minns [mailto:fminns AT WILEY.CO DOT UK]
Verzonden: donderdag 6 maart 2003 16:49
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: TSM Performance - Is it my backuppool


OK, I have just done another test and here are my findings.

TSM 4.2.2.12 running on a Solaris E250, 400Mhz, 1GB, 50GB backuppool on
RAID5 array, 8500MB DB and LOG on separate internal disks (TSM mirrored).

I just backed up a 100Mb file via a client on the same machine as the
server. Data transfer rate 1.5MB/s. Terrible. File was on the same RAID 5
array as the backuppool. I then restored that very same file to the very
same location and got a transfer speed of no less than 51MB/s. Much better!

So, could the problem lie with my backuppool for some reason, and if so,
how would I know. We do have caching turned on if that makes any
difference.

Any ideas on this one?

Thanks to all

Farren Minns - John Wiley & Sons Ltd