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| eva555 |
 Posted: Mon Sep 10, 2012 2:44 am Post subject: backup and recover across platforms |
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Novice
Joined: 10 Sep 2012
Posts: 15
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Hi All,
We are moving our qmgrs from MQ6(AIX) to MQ7.5(Linux). Ihave never done it across platforms before so wondering if the /var/mqm backup taken on AIX machine work as expected when restored to the /var/mqm on the linux machine ? |
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| exerk |
| Posted: Mon Sep 10, 2012 2:58 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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Bearing in mind that as you are migrating to WMQ V7.5 that /var/mqm may not be your installation path, what are the chances that system files from one OS will be readable by another OS?
Ensure your queue managers are 'empty', i.e. no user-application messages. Use the appropriate SupportPac to back up the objects of your current queue managers and use those back-ups to recreate the queue managers on your new infrastructure.
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| nathanw |
| Posted: Mon Sep 10, 2012 3:00 am Post subject: |
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Knight
Joined: 14 Jul 2004
Posts: 550
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| exerk wrote: |
Bearing in mind that as you are migrating to WMQ V7.5 that /var/mqm may not be your installation path, what are the chances that system files from one OS will be readable by another OS?
Ensure your queue managers are 'empty', i.e. no user-application messages. Use the appropriate SupportPac to back up the objects of your current queue managers and use those back-ups to recreate the queue managers on your new infrastructure. |
Totally agree
It may take longer and be more arduous BUT in the end it is a better method
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| eva555 |
| Posted: Mon Sep 10, 2012 3:03 am Post subject: |
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Novice
Joined: 10 Sep 2012
Posts: 15
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| Thanks for the reply....Currently in the dev/QA environment, we are taking the MQSC backups via "saveqmgr" from AIX, create the objects in the newly created qmgr on the linux machine. And it all works fine without any hassle. But in production, we do not want to lose any msgs. So thinking of restoring backups from old qmgr |
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| fjb_saper |
| Posted: Mon Sep 10, 2012 3:05 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| exerk wrote: |
Bearing in mind that as you are migrating to WMQ V7.5 that /var/mqm may not be your installation path, what are the chances that system files from one OS will be readable by another OS?
Ensure your queue managers are 'empty', i.e. no user-application messages. Use the appropriate SupportPac to back up the objects of your current queue managers and use those back-ups to recreate the queue managers on your new infrastructure. |
@exerk Missing some coffee? /var/mqm would/should not contain any system files.
@eva555
Have you tried it? What happened when you did?
Make sure your backup plan is ready to go and looks very much like what exerk described. 
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| exerk |
| Posted: Mon Sep 10, 2012 3:06 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| fjb_saper wrote: |
| @exerk Missing some coffee? |
Very much so it seems 
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| nathanw |
| Posted: Mon Sep 10, 2012 3:12 am Post subject: |
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Knight
Joined: 14 Jul 2004
Posts: 550
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| eva555 wrote: |
| Thanks for the reply....Currently in the dev/QA environment, we are taking the MQSC backups via "saveqmgr" from AIX, create the objects in the newly created qmgr on the linux machine. And it all works fine without any hassle. But in production, we do not want to lose any msgs. So thinking of restoring backups from old qmgr |
if when you stop MQ if you quiesce it then no more incoming data only outgoing
to make sure stop any channels for incoming messages .....
that way when you run the saveqmgr back up it should have no messages and therefore you should not have an issue
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Who is General Failure and why is he reading my hard drive?
Artificial Intelligence stands no chance against Natural Stupidity.
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| Andyh |
| Posted: Tue Sep 11, 2012 1:19 pm Post subject: |
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Master
Joined: 29 Jul 2010
Posts: 239
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| You don't mention what hardware you're planning to use, but assuming the migration is from POWER to X86-64 it will NOT be possible to backup the queue manager from AIX/POWER (big endian) and restore it on Linux/X86-64 (little endian). |
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