ADSM-L

Server partitioning using TSM library sharing

2002-07-19 16:19:45
Subject: Server partitioning using TSM library sharing
From: Scott McCambly <mccambly AT ATTCANADA DOT CA>
Date: Fri, 19 Jul 2002 16:26:42 -0400
Hello fellow TSMers,

We have a fairly large TSM server that we are planning to partition into 2
servers. In other words, add a second server and split the client nodes
across the two.

The hardware environment is two AIX TSM servers, both fibre attached to a
10 drive 3494 ATL.

What I am proposing to do (and looking for input) is as follows:

1) Restore a copy of TSM server-A's database to the new TSM server-B
2) Reconfigure the library and drive configuration on TSM server-B to be a
library client to the shared library manager server-A.
3) Identify the nodes that are to be associated with each server.
4) Identify the volumes associated with the nodes for each server (Storage
pools are currently fully collocated by node).
5) Run update libvol to change the owner on the appropriate tapes to be
owned by server-B.
6) Delete the filespace and node definitions for the nodes NOT associated
with each server.
7) Reconfigure half the nodes to point to the new server-B.
8) Pat myself on the back and take the rest of the day off :-)

It seems too simple....  Has anyone done this before? (hard to type with my
fingers crossed)

The big question of course is: what happens to volume ABC123 on server-A
when the filespaces are deleted and the volume empties, gets deleted from
the storage pool, and returned to scratch? Server-B still thinks there is
data on that tape and this proposed solution would only work if he was
allowed to request a mount and read that volume.

Any and all feedback is appreciated!

Scott
Scott McCambly
AIX/NetView/ADSM Specialist - Unopsys Inc.  Ottawa, Ontario, Canada
(613)799-9269
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