We used the VTL to reduce the disk pool size. We use disk pools to prevent the
issue you are having. We wanted to make sure the TSM backend processing would
not be interfered with by a node that is not able to complete a backup during
the normal time. The only nodes that go straight to tape (real or imagined)
are those with very large objects.
Andy Huebner
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
David Longo
Sent: Monday, April 06, 2009 12:47 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Backup stg with VTL tape in use
I have TSM server 5.4.3.0 and an IBM 3584 library with LTO2/3 drives.
Recently installed a Diligent VTL. I have migrated one of my smallest
Storage pools to VTL and find one problem. In this Domain, I have one
Windows client that takes about 23 hours to backup - 10's of millions of files.
With VTL, I got rid of my Disk Pool for this Domain. Now when I do a
"Backup stg" from my VTL pool to real LTO tape, it is waiting for Virtual
tape that client is writing to. Client only backs up about 5 GB a day, so
most times writing little or nothing, however the VTL tape is "IN USE".
Is there a way to "breakin" to tape and force new tape to mount? I have
looked at TSM server doc and don't see it.
I have well over 400 clients and about a dozen are like this, taking well
6-24 hours to backup. Thinking about it some, the only, or the simplest
option I see, is to take these dozen clients and put them in a Domain
by them selves that will still use a disk pool. Part of the reason for
VTL was to get rid of disk pools. (DEDup and faster restores was primary
reason.)
Anything simple I have missed? (We have already looked at making these
clients run in less time, we are stuck with what we have for some time to come.)
Thanks,
David Longo
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