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Hypothetical Question

To: nv-l@lists.tivoli.com
Subject: Hypothetical Question
From: Chris Cowan <chris.cowan@2ND-WAVE.COM>
Date: Wed, 3 Feb 1999 17:58:11 -0500
Organization: 2nd Wave
Reply-to: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>
Sender: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>

A multi machine AIX 4.3.1 HACMP cluster.

Machine 1 - TMR 3.6 Server
Machine 2 - TEC 3.6 Server
Machine 3 - Netview 5.1

Tivoli Filesystems (/usr/local/Tivoli, /var/spool/Tivoli).
Endpoints presently in the default /opt/Tivoli
All 3 machines have access to a shared disk cabinet  (Right now it's an
IBM SSA, later it may be EMC).

We are probably going to go with unique filesystems like:

And then switch by making and breaking symlinks to /usr/local/Tivoli and

The failover scenario is to move the either the TMR (with priority) or
the TEC server over to the Netview machine.
The sequence would be:
- Detect the machine going down
- Stop Netview (ovstop)
- Stop Netview's oserv
- Umount Netview's MN Filesystems
- Assume the failed-over machine's IP address
- Mount failed machine's MN Filesystems
- Start oserv

The billion dollar question is:
Can Netview be brought up again with a "new" Managed Node running
underneath of it???????

Obviously, we would have to do the "reset_ci" procedure since the
hostname/ip address of the Netview Manager will have changed.   How easy
would it be to move the change the underlying MN configuration and keep
the Administrative and NV Event Adapter stuff running.

The following things come to my mind:
- SNMP traps from agents would have to be retargeted (or all agents
should be configured for multiple targets from the outset.
- All three MN would have to have a Netview Server object installed on
- The local snmpd and snmpd.conf may have to be messed with.
- These three systems are also running Endpoints (for Event Adapter
support).   Presently, they are configured for /opt/Tivoli.   I can
reinstall them to run in /usr/local/Tivoli/lcf.   (Probably a good idea
for several reasons).

Also, are there an implications of reversing this procedure?

Please don't tell me it's bad idea, not my call.    I may have to
implement this regardless.


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