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| mqmike |
 Posted: Fri Feb 11, 2005 8:41 am Post subject: MQ with HACMP |
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Acolyte
Joined: 09 Jul 2004
Posts: 63
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Last week I put a patch on to a qmgr (CSD08 for MQv5.3) on AIX. I've since found out that the server has HA configured for failover to a backup server. There is no clustering or anything like that set up but I've been told that some of the filesystems are on shared disk (/var/mqm I suspect).
My question is how can I bring the other (ie the backup box) up to CSD08? Can I do this without stopping MQ and just do a straight update on the backup side?
In the meantime if the server did fail over would we be in big trouble due to the difference in patch levels?
Regards
Mike |
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| csmith28 |
| Posted: Fri Feb 11, 2005 8:46 am Post subject: |
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Grand Master
Joined: 15 Jul 2003
Posts: 1196
Location: Arizona
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I think you can get away with turning off HACMP on the backup server then start the MQManager but don't start you listener process or the channel initiator.
Then perform your upgrade, bring the MQManager down and turn HACMP back on.
It's been a while since I worked with HACMP but if I recall correctly that should work.
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Yes, I am an agent of Satan but my duties are largely ceremonial. |
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| EddieA |
| Posted: Fri Feb 11, 2005 9:57 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| then start the MQManager |
Why would you need to start the QM to apply service. The 1st thing it will do is complain about running processes and ask you to close them down.
Cheers,
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Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
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| csmith28 |
| Posted: Fri Feb 11, 2005 10:00 am Post subject: |
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Grand Master
Joined: 15 Jul 2003
Posts: 1196
Location: Arizona
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| EddieA wrote: |
| Quote: |
| then start the MQManager |
Why would you need to start the QM to apply service. The 1st thing it will do is complain about running processes and ask you to close them down.
Cheers, |
Oh yeah, right.  I was trying to think before I had any coffee.
Since this is the case he should be able to install the Service Pack without stopping HACMP as well.
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| EddieA |
| Posted: Fri Feb 11, 2005 11:12 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| I was trying to think before I had any coffee. |
I know that feeling. 
Cheers,
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Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
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| xxx |
| Posted: Fri Feb 11, 2005 8:21 pm Post subject: |
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Centurion
Joined: 13 Oct 2003
Posts: 137
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There are two ways ,
1) as binaries are installed on local filesystems,
We can just install the csd on the other server , and should be ok,
There may be a possibilty that it may complain about the missing log, I am not sure,
2) The preferred way or the way I do,
With the help of AIX/unix admin , we take the down time and fail the server to the backup Qmanger , Check if they work properly,
Stop the Qmanger , install the Patch CSD08,
start the Qmanger and see if everything works fine,
Stop it and fail back to the Primary node |
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| mqmike |
| Posted: Sat Feb 12, 2005 12:45 am Post subject: |
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Acolyte
Joined: 09 Jul 2004
Posts: 63
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Thanks guys
Can I just confirm what you're saying?
I should be able to just stop the qmgr and do the install on the backup server.
But probably the preferred way is to fail over to backup and then do the patch.
In the second instance though will there be any problem failing over from the side that has CSD08 on, to the backup side that hasn't had this installed? Or do you mean I should shutdown the qmgr first, failover, apply the patch and then bring it up? |
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| csmith28 |
| Posted: Sat Feb 12, 2005 8:34 am Post subject: |
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Grand Master
Joined: 15 Jul 2003
Posts: 1196
Location: Arizona
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Well, you shouldn't have to failover anything. CSD08 is already on the the primary server right?
Just stop the MQManager on the Secondary and install the Service Pack.
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| mqmike |
| Posted: Sat Feb 12, 2005 12:38 pm Post subject: |
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Acolyte
Joined: 09 Jul 2004
Posts: 63
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Yes CSD08 is on the primary.
I'm not sure I can stop the qmgr on the backup because as far as I understand there is only one qmgr shared between the two. I think /var/mqm is the shared filesystem and therefore only the binaries are local to each box |
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| EddieA |
| Posted: Sat Feb 12, 2005 2:19 pm Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| I'm not sure I can stop the qmgr on the backup |
It shouldn't be running. It should only start when the primary fails.
| Quote: |
| think /var/mqm is the shared filesystem and therefore only the binaries are local to each box |
Yep, that's the usual set-up.
Cheers,
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Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
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| mqmike |
| Posted: Sun Feb 13, 2005 5:58 am Post subject: |
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Acolyte
Joined: 09 Jul 2004
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