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| pfarrel |
 Posted: Wed Mar 01, 2006 8:10 am Post subject: Fallback WMQ from V6 to V5 on AIX |
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Centurion
Joined: 16 Mar 2004
Posts: 120
Location: Kansas City
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I am working on an upgrade of WMQ from V5 to V6, and I would like to have a fallback plan for my AIX platform. I know that I can use saveqmgr ( MS03 ) and amqoamd to save my object and security definitions, so that if necessary I can uninstall V6 and reinstall V5, and get back ( more or less ) to where I was.
I have tried another method, but it doesn't seem to work. I tried backing up the folders /usr/mqm and /var/mqm on V5, then running the upgrade to V6, then restoring the backups. This method results in a system which will not run.
Can anyone suggest what I might need to do to get the backup/restore method to work ? |
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| vennela |
| Posted: Wed Mar 01, 2006 8:16 am Post subject: Re: Fallback WMQ from V6 to V5 on AIX |
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Jedi Knight
Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
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| pfarrel wrote: |
| I have tried another method, but it doesn't seem to work. I tried backing up the folders /usr/mqm and /var/mqm on V5, then running the upgrade to V6, then restoring the backups. |
After the upgrade if you want to downgrade
Uninstall v6
Install v5.3
Restore /var/mqm only
That might work. |
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| HubertKleinmanns |
| Posted: Wed Mar 01, 2006 8:35 am Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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pfarrel,
backup /var/mqm when all QMgrs are down (not /usr/mqm). Then follow vennelas description. I did it several times and it worked always prooper.
When one or more QMgr is up, the transaction logs (/var/mqm/log/...) and the QMgr data (/var/mqm/qmgrs/...) are not consistent. The QMgr will (mostly) not come up after restore.
_________________
Regards
Hubert |
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| PeterPotkay |
| Posted: Thu Mar 02, 2006 9:19 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Is it guaranteed that upgrading to 6.0 doesn't alter anything in var/mqm?
_________________
Peter Potkay
Keep Calm and MQ On |
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| wschutz |
| Posted: Thu Mar 02, 2006 9:21 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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| PeterPotkay wrote: |
| Is it guaranteed that upgrading to 6.0 doesn't alter anything in var/mqm? |
considering that there are new attributes for queues, channels are now "objects", there are new listener and service objects, it doesn't seem likely, does it?
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-wayne |
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| pfarrel |
| Posted: Thu Mar 02, 2006 10:42 am Post subject: |
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Centurion
Joined: 16 Mar 2004
Posts: 120
Location: Kansas City
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I think that I have got my backup/restore process working. Here are some of the things that I learned:
- Take backup of V5 with QMGR down.
- What needs to be backed up is /usr/mqm and /var/mqm.
- When preparing to restore, remove the V6 folders at /var/mqm and /usr/mqm. This will ensure that you don't get any V6 files mixed in with the restored V5 files.
- When restoring, ensure that whatever process you use does not change any file ownership or access permissions.
- After restoring /var/mqm and /usr/mqm from the V5 backup, V5 comes up OK. |
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