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| vimal |
 Posted: Tue Oct 06, 2009 1:21 pm Post subject: Conname changes in cluster |
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Novice
Joined: 03 Sep 2009
Posts: 10
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| I need to alter the host names in a cluster environment. Can anyone give me the steps to follow? Do I need to suspend the qm's from the cluster, if so,..the order of suspension..PR or FR ? Do i need to use refresh cluster in the process? The applications are using the MQ so all the message flows should be stopped first, right? |
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| bruce2359 |
| Posted: Tue Oct 06, 2009 2:04 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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This has been discussed here many, many times. Use the Search button above. Search for cluster conname.
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fjb_saper |
| Posted: Tue Oct 06, 2009 8:18 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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The cluster manual  , the board and ultimately a dose of common sense   will lead you to serenity 
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MQ & Broker admin |
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| shashivarungupta |
| Posted: Wed Oct 07, 2009 9:57 am Post subject: Re: Conname changes in cluster |
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Grand Master
Joined: 24 Feb 2009
Posts: 1343
Location: Floating in space on a round rock.
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| vimal wrote: |
| I need to alter the host names in a cluster environment. Can anyone give me the steps to follow? Do I need to suspend the qm's from the cluster, if so,..the order of suspension..PR or FR ? Do i need to use refresh cluster in the process? The applications are using the MQ so all the message flows should be stopped first, right? |
wow... so many questions in a question... what an example of nested if and then. ...its like a ball of wool..you got to find the corner/start of the thread. 
 start fishing...
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*Life will beat you down, you need to decide to fight back or leave it. |
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| bruce2359 |
| Posted: Wed Oct 07, 2009 10:07 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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Ponder this: if you change hostnames while applications are running, what will be the consequence? Think failure.
The WMQ Clusters manual suggests how to change (ALTER) cluster object attributes. Channels (cluster or non-) require that the channel be stopped (or inactive), and then restarted, for important changes to take effect.
Did you search this site for others that have asked the exact same question - as recently as last week?
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| exerk |
| Posted: Wed Oct 07, 2009 10:47 pm Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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If only the host name changes, and you are using strict IP Addresses in your CONNAME's, there should be no requirement to change anything in the queue manager cluster. If, on the other hand, you are using DNS names then all that has been stated before is apposite. If you have to change the CONNAME's, start with the FR's first, then the PR's.
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| crossland |
| Posted: Thu Oct 08, 2009 2:55 am Post subject: |
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Master
Joined: 26 Jun 2001
Posts: 248
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Changing the CONNAME of channels in clusters is one of those wonderful "features" of MQ.
The best approach is to take the channel out of the cluster, make the CONNAME change and then put the channel back into the cluster.
Maybe one day it will be possible to just alter the conname for a channel that is in a cluster ...
(one to add to the wish list) |
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| mqjeff |
| Posted: Thu Oct 08, 2009 2:57 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| crossland wrote: |
| Maybe one day it will be possible to just alter the conname for a channel that is in a cluster ... |
It is entirely possible now.
It just takes significantly longer to take affect across the entire cluster than most people are willing to wait for. |
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| crossland |
| Posted: Thu Oct 08, 2009 3:07 am Post subject: |
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Master
Joined: 26 Jun 2001
Posts: 248
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| mqjeff wrote: |
| crossland wrote: |
| Maybe one day it will be possible to just alter the conname for a channel that is in a cluster ... |
It is entirely possible now.
It just takes significantly longer to take affect across the entire cluster than most people are willing to wait for. |
Very true; even with a tiny cluster, it took longer than my patience threshold. |
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