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| sloaneuys |
 Posted: Wed May 14, 2008 10:23 pm Post subject: Backward Migration of a WMQ V6 Queue Manager to V5.3 on Win |
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Newbie
Joined: 12 Jul 2006
Posts: 9
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Hi all,
Is it possible to Backward migrate from MQ V6 to MQ V5.3 without deleting the queue manager and re-creating once WMQv5.3 has been re-installed??
I have not been able to locate links that confirms whether it's possible...
Thanks!!!!!
Sloane |
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| Nigelg |
| Posted: Wed May 14, 2008 10:56 pm Post subject: |
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Grand Master
Joined: 02 Aug 2004
Posts: 1046
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No, this is not possible. The persistent data files, queues and logs, are migrated to the format required by the new release.
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| Gaya3 |
| Posted: Wed May 14, 2008 11:05 pm Post subject: |
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Jedi
Joined: 12 Sep 2006
Posts: 2493
Location: Boston, US
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forcing me to ask these questions:
what make you to think like this? any reason
why you need it?
Why go back to V5.3, as its out-of support.
Regards
Gayathri
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Gayathri
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| Vitor |
| Posted: Wed May 14, 2008 11:09 pm Post subject: Re: Backward Migration of a WMQ V6 Queue Manager to V5.3 on |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| sloaneuys wrote: |
Is it possible to Backward migrate from MQ V6 to MQ V5.3 without deleting the queue manager and re-creating once WMQv5.3 has been re-installed??
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No, you'll need to restore from a system backup if you want the old details back.
Probably easier to delete & recreate if you've got the script.
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Honesty is the best policy.
Insanity is the best defence. |
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| sloaneuys |
| Posted: Wed May 14, 2008 11:15 pm Post subject: |
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Newbie
Joined: 12 Jul 2006
Posts: 9
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We are about to embark on upgrading WMQ on our Microsoft clustered WebSphere Message broker(V6) machines from V5.3 to MQ V.6.
We need to structure a regression plan and as you know, the broker is already associated with the current queue manager(V5.3).
For whatever reason we need to regress, I need to know if the original queue manager will still be able to start. If not, then we have to re-create the queue manager and as a result the broker as well.
Sloane |
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| Vitor |
| Posted: Wed May 14, 2008 11:17 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| sloaneuys wrote: |
| For whatever reason we need to regress, I need to know if the original queue manager will still be able to start. If not, then we have to re-create the queue manager and as a result the broker as well. |
If you regress the software level for WMQ back to v5.3 then any queue manager which has been started while the software was at v6 will not then start unless a) the data files are also regressed by means of a system restore or b) the queue manager is deleted & recreated under v5.3.
I think this was clear from the previous posts.
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| sloaneuys |
| Posted: Wed May 14, 2008 11:54 pm Post subject: |
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Newbie
Joined: 12 Jul 2006
Posts: 9
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Thanks for all the responses guys.
Although I know this is an extreme measure, our client is very diligent - hence the need for this regression test! |
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| Vitor |
| Posted: Thu May 15, 2008 12:05 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| sloaneuys wrote: |
| Although I know this is an extreme measure, our client is very diligent - hence the need for this regression test! |
There's nothing extreme about a regression plan. Sometimes you just have to back out.... 
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| PeterPotkay |
| Posted: Thu May 15, 2008 8:42 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| sloaneuys wrote: |
then we have to re-create the queue manager and as a result the broker as well.
Sloane |
Why do you have to recreate the Broker?
There are links peppered throughout this forum that lead to official IBm doc on how to roll bacl from 6.0 to 5.3, and what you need to do ahead of that so you can do it if you have to.
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Peter Potkay
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| sloaneuys |
| Posted: Wed May 21, 2008 1:36 am Post subject: |
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Newbie
Joined: 12 Jul 2006
Posts: 9
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Thanks Peter, found the link.
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg21251721
question1
If I believe that i may need to use the queue manager at V5.3 again. Do i have to delete the queue manager at V6 and then recreate it at V5.3... or is it possible for the original queue manager definition to start up at V5.3 once the
- queue manager directory
- log directory
- Windows Registry
(HKLM\SOFTWARE\IBM\MQSeries\CurrentVersion\Configuration\QueueManager)
have been restored from backup. |
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| Vitor |
| Posted: Wed May 21, 2008 1:57 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| sloaneuys wrote: |
Do i have to delete the queue manager at V6 and then recreate it at V5.3... or is it possible for the original queue manager definition to start up at V5.3 once the
- queue manager directory
- log directory
- Windows Registry
(HKLM\SOFTWARE\IBM\MQSeries\CurrentVersion\Configuration\QueueManager)
have been restored from backup. |
If you've restored that lot from backup, then you've logically deleted the v6 queue manager by overwriting it with the v5.3 queue manager. If at this point you start the queue manager with the v5.3 software then it will start, if you start it with the v6 software it will convert these files to v6 and start.
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| PeterPotkay |
| Posted: Wed May 21, 2008 9:39 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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That link doesn't say anything about having to recreate the broker if we recreate the queue manager when going back to 5.3.
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Peter Potkay
Keep Calm and MQ On |
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