Mark,
Oh, that options were as simple to understand as you've stated. Such is not
the case, and the actual internals of resourceutilization will remain
obscure even after an explanation, as I learned from my friend Todd last
week.
From the description of your system, let me guess that you have at least one
other mount point besides your 75GB filesystem that you are attempting to
test, and that those other filesystems are not excluded from your test. If
so, the behavior you are experiencing is quite normal.
Without the 15 page explanation, let me suggest that a solution to your
problem may lie in the definition of multiple virtualmountpoints within your
75GB filesystem. Otherwise, you will have only one long running consumer
session session.
Bill Smoldt SSSI
Storage Solutions Specialists, Inc.
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
Mark Owens
Sent: Friday, April 14, 2000 10:25 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Multithreading w/TSM 3.7.2
AIX Server : TSM 3.7.2
TSM Client/Aix : 3.7.1
AIX : 4.3.2 & 4.3.3
commethod : sharedmemory
Hi All,
With TSM 3.7, Tivoli has provided the resourceutilization parameter in
dsm.sys
and the maxnummp parameter when you register your node. To the best of my
knowledge, maxnummp equates to mount points and when using a tape
storagepool
this equates to the number of tape drives that will be used for the backup.
The
resourceutilization throttles system resources and the number of sessions
used for the backup.
While testing with a single node, maxnummp=2 and resour=7 and a 75gig test
filesystem I'm noticing two sessions are started, two tape mounts occur,
each
session performs a backup. Then, after approx 2-3 minutes the last session
started
ends....... no error.......tape not full....... after the retention timer of
1 minute the
tape dismounts. The odd thing is the backup has not completed, the remaining
session
is left to complete the backup. I'm told TSM 3.7 performs some sort of
pre-backup
calculation to determine the optimal number of sessions to start and remain
active in
order to complete the backup.
Clearly (depending on the number of resources at my disposal) I'd like to
complete
the backup as soon as possible with as many tapes as possible without TSM
stopping
the active sessions I have running. Has anyone else experienced this or been
able
to have numerous sessions active writing to muliple tapes?
Mark
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