Etienne,
If you spread your volumes over multiple disks like I do, you might want
to define private FILE volumes for the disk pool (that is, zero scratch
volumes). That gives me full control over where the volume files are
located. Otherwise TSM will allocate all volumes from the first drive in
the set until that drive fills up.
In addition, you have to think of the number of simultaneous mounts. In
my case, twelve mounts is adequate to support a total of about 120 nodes
during the entire backup window. At this writing, six of those volumes
are in "filling" status so I assume there have never been more than six
mounted at any one point.
Otherwise, no special consideration. It just works.
Tab
Etienne Brodeur <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
07/05/2002 09:15 AM
Please respond to "ADSM: Dist Stor Manager"
To: [EMAIL PROTECTED]
cc:
Subject: Re: Reclaiming LTO Tapes
Hi Tab,
What are the impact o fusing a FILE rather than a DISK devclass
other than faster reclamation of copypool?
Thanks for the info.
Etienne
Jack,
It's been mentioned before, but if you use a disk pool for directories,
you should make the disk pool a FILE devclass.
When my directory disk pool was DISK devclass, copypool reclamation would
launch and eight hours later I would have reclaimed a few tens of MBs.
I rebuilt the directory disk pool as FILE devclass, and copy pool
reclamation proceeds at full speed from the start.
Tab Trepagnier
TSM Administrator
Laitram Corporation
"Coats, Jack" <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
07/03/2002 03:35 PM
Please respond to "ADSM: Dist Stor Manager"
To: [EMAIL PROTECTED]
cc:
Subject: Re: Reclaiming LTO Tapes
I cannot find out how to speed me up either! Mine is slower than sin,
on reclaiming my offsite copypools especially.
-----Original Message-----
From: Guillaume Gilbert [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 03, 2002 8:41 AM
To: [EMAIL PROTECTED]
Subject: Reclaiminig LTO Tapes
Hey there
Maybe its because I'm used to using STK 9840 tapes but yesterday I saw an
LTO tape at 25 % utilisation take almost 4 hours to reclaim, which to me
is
awful. How am I
supposed to reclaim my tapes with that kind of performance?. The drives I
use are IBM Ultriums in a 3584 library. With only 2 drives it makes it
hard
for users to do
restores...
Are there any options I can change to make this go a bit faster. I know
the
start/stop on LTO's isn't good.
Thanks for the help.
Guillaume Gilbert
CGI Canada
