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| Some Backup questions |
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| gbaddeley |
 Posted: Sun Aug 12, 2012 4:54 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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Another approach to MQ backup / DR startegy is to not include messages and logs. Queued messages are the responsibility of applications, and as MQ administrators we can't say what should or should not be saved or restored at any given point in time. If an inappropriate restore was done it could completely screw the applications.
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| fjb_saper |
| Posted: Mon Aug 13, 2012 5:15 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20763
Location: LI,NY
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And you mean to say that the Rocket Scientist did not get banned with a severe demerit?
I hear you, the damage is done. What else you can do is recreate the qmgr from scratch, load it with a copy of the last saveqmgr backup (hopefully it wasn't on the same crashed disks) and present a qmgr with "emtpy" queues.
To the apps now to reproduce the messages that were waiting on the queues... You better pray that they have some sort of reconciliation and are able to reproduce the original msg if it did not yet get processed...
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| Vitor |
| Posted: Tue Aug 14, 2012 2:44 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| gbaddeley wrote: |
| Another approach to MQ backup / DR startegy is to not include messages and logs. Queued messages are the responsibility of applications |
Ouch. That's harsh; as WMQ administrators we're responsible for a guaranteed message delivery system, and even I'd have trouble explaining the guarantee only holds when everything works.
| gbaddeley wrote: |
| as MQ administrators we can't say what should or should not be saved or restored at any given point in time. |
Well we can. It's all the persistent messages. Now if that restarts the "who sets message persistence" debate I apologise to all.
| gbaddeley wrote: |
| If an inappropriate restore was done it could completely screw the applications. |
And if no restore was done it would screw them worse. Most systems (and business processes) have much richer facilities to handle duplicates than they do missing data.
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Honesty is the best policy.
Insanity is the best defence. |
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