Hi

This is a solution where you would benefit from using HACMP.

You could have to clustergroups, each containing a TSM server, some disks 
and some network adapters. Each clustergroup would have one preferred 
node, but would also be able to move to the other node.

Only thing to note, is, you have to have different TCPPorts one the two 
TSM servers, as they could be running on the same machine in the event of 
a disaster.

You then use AIX mirroring, or TSM DB mirroring, to mirror the databases 
between the two sites(preferably using AIX mirroring to two different disk 
subsystems, one subsystem on each site).

I have two configurations like this running today, and it works like a 
charm.

Best Regards

Daniel Sparrman
-----------------------------------
Daniel Sparrman
Exist i Stockholm AB
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183 62 TÄBY
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Stef Coene <stef.coene AT DOCUM DOT ORG>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2003-05-15 13:26
Please respond to "ADSM: Dist Stor Manager"
 
        To:     ADSM-L AT VM.MARIST DOT EDU
        cc: 
        Subject:        Dual site configuration


Hi all,

Let's say I have 2 sites.  The first site is the production site and the
second site is the standby site.  But the standby site has also some local
servers to backup.  Both sites have a TSM server on AIX and an LTO 
library.

The question is, can I somehow copy the TSM data from the first site to 
the
second site in such way that it can be used in case a disaster strikes on 
the
primary site.  Ideally, the 2 TSM servers should be able to access the 
same
data from the nodes.

Some solutions I found so far :

- backup-set : create a backup-set each day for the nodes and move them to 
the
other site so we can restore the nodes data without the TSM server.  But 
this
will require a lot of data movement between the 2 sites.

- remote offsite storage pool copy : the data on the primary site can be
backuped to the second site.  But this requires a restore of the primary 
site
if we want to access that data.

- restore primary site on second site : backup the second site and remove 
the
tapes out of the library.  After that we can restore the primary site on 
the
hardware of the second site.  This also requires that we have a backup of 
the
data of the primary site.  This can be done with offsite tapes that are 
daily
made.  This also made the TSM server on the second site unavailable for
backup and restore of local NT-servers.

What I really need is 2 TSM servers who replicated the date between them. 
So
clients can backup and restore to both servers.

Any input is welcome.

Stef

--

stef.coene AT docum DOT org
 "Using Linux as bandwidth manager"
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