ADSM-L

Re: NT Cluster & TSM

2002-05-26 17:51:14
Subject: Re: NT Cluster & TSM
From: Zlatko Krastev <acit AT ATTGLOBAL DOT NET>
Date: Sun, 26 May 2002 11:47:16 +0300
Can you be sure that since you've set it up nothing has changed. It would
be interesting to see current dsm.opt of local & cluster node. Also the
way how schedules are started may sched some light. Also check file backup
dates on those unnecessary filespaces - maybe someone manually invoked
dsmc with local option file and this is not done by regular schedules.

Zlatko Krastev
IT Consultant




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Subject:        Re: NT Cluster & TSM

The way I have set this up is to use the CLUSTER name in TSM for the
shared storage, and the two local computer names for the local drives.

nodename
Cluster       - controls the F,G,H,I,J drives (CLUSTERNODE YES option)
Server1      - controls c and d drive (Domain C, Domain D...)
Server2      - controls c and d drive (Domain C, Domain D...)

I have 2 schedules on each node - one for local backps and one for cluster
backups. I created a group in the cluster admin to control backups service
for the shared drives and keep the local node backups to automatic

Joe

                 -----Original Message-----
                 From: Zlatko Krastev [mailto:acit AT ATTGLOBAL DOT NET]
                 Sent: Fri 24/05/2002 4:55 PM
                 To: ADSM-L AT VM.MARIST DOT EDU
                 Cc:
                 Subject: Re: NT Cluster & TSM



                 The only explanation is that server1 somehow is getting
DOMAIN ALL-LOCAL.
                 Check carefully which dsm.opt is used when cluster
instance goes to
                 server1 and are there any DOMAIN options in a optionset
associated to that
                 node.
                 If domain all-local gets somehow into "local" node then
is have two
                 current copies of shared files. But if cluster resources
are backed up as
                 "server1" instead of "cluster" the only way to
distinguish which version
                 is the current is checking the date or very-very
carefully follow
                 failovers.

                 Zlatko Krastev
                 IT Consultant




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                 Subject:        NT Cluster & TSM

                 Hello,
                 I'd like to ask a question about NT cluster with TSM..
                 I have got an NT Cluster and the backup is made with TSM.
On the TSM
                 server
                 side I've got defined 2 server, each one for each real
server: server1 and
                 server2. There are another two server defined for shared
disks: disk1(disk
                 f:) and disk2 (disk g:).
                 There are four file spaces:
                 FileSpace Name  Node Name
                 \\server1\c$            server1
                 \\server2\c$            server2
                 \\cluster\f$            disk1
                 \\cluster\g$            disk2
                 The DOMAIN option in the opt files are
                 Server1         DOMAIN C:
                 Server2         DOMAIN C:
                 disk1           DOMAIN F:
                 disk2           DOMAIN G:
                 From the backup point of view it works fine, the problem
arises when the
                 shared disks are moved from one real server to the other.
                 In this situation the shared disks are considered as
local disks for the
                 real servers and a full backup of those disks are made,
and the file
                 spaces
                 are as follows
                 FileSpace Name  Node Name
                 \\server1\c$            server1
                 \\server1\f$            server1
                 \\server1\g$            server1
                 \\server2\c$            server2
                 \\cluster\f$            disk1
                 \\cluster\g$            disk2

                 The creation of the two new file spaces is normal? Is
this situation ok?

                 Another problem arises when there is a need of restoring
a file: where is
                 the backup of one file residing in disk f:? in
\\server1\f$ or in
                 \\cluster\f$ or in both? Which one is the most recent?
and other than the
                 last one?

                 Can anyone help me in clarifing those questions?

                 Angel Antsn
                 E-Mail : aantonh AT gipuzkoa DOT net
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