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| varunv |
 Posted: Wed Jun 17, 2009 3:36 am Post subject: REFRESH CLUSTER |
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Novice
Joined: 04 Feb 2009
Posts: 16
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| Hi, I am new to Clustering,Can any one help me abt REFRESH CLUSTER and where should i use REFRESH CLUSTER.Thanks A Lot |
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| Vitor |
| Posted: Wed Jun 17, 2009 3:38 am Post subject: Re: REFRESH CLUSTER |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| varunv wrote: |
| where should i use REFRESH CLUSTER. |
Where? From a Full Repository
When? If told to do so by IBM as part of a PMR to resolve a cluster problem.
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| PeterPotkay |
| Posted: Wed Jun 17, 2009 4:10 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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RESET CLUSTER needs to be run from a Full Repository. REFRESH CLUSTER can be run from any QM in the cluster.
You probably don't need to run either.
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Peter Potkay
Keep Calm and MQ On |
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| shashivarungupta |
| Posted: Wed Jun 17, 2009 4:10 am Post subject: Re: REFRESH 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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| varunv wrote: |
| Hi, I am new to Clustering,Can any one help me abt REFRESH CLUSTER and where should i use REFRESH CLUSTER.Thanks A Lot |
In this forum, if you make a search on this topic, you'll get a lot of results.
You can even check the "Cluster" manual on page 58, 64, provided by IBM.
"You can issue the REFRESH CLUSTER command from a queue manager to remove all cluster queue-manager objects and all cluster queue objects relating to queue managers other than the local one, from the local repository. The command also removes any auto-defined channels that do not have messages on the cluster transmission queue and which are not attached to a repository queue manager.
Effectively, the REFRESH CLUSTER command allows a queue manager to be “cold started” with respect to its repository content."
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| Vitor |
| Posted: Wed Jun 17, 2009 4:16 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
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Location: Texas, USA
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| PeterPotkay wrote: |
RESET CLUSTER needs to be run from a Full Repository. REFRESH CLUSTER can be run from any QM in the cluster.
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But REFRESH CLUSTER is more fun from an FR. You get amusing wailing noises from the network people.... 
I stand by the "when".
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| shashivarungupta |
| Posted: Wed Jun 17, 2009 4:18 am Post subject: |
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Grand Master
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As a NOTE: There is a thin difference between REFRESH and RESET CLUSTER commands. please take care of these and try to avoid these commands until there is/are valid reason/s to shoot these commands.
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| Vitor |
| Posted: Wed Jun 17, 2009 4:29 am Post subject: |
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Grand High Poobah
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Location: Texas, USA
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| shashivarungupta wrote: |
| try to avoid these commands until there is/are valid reason/s to shoot these commands. |
As a rule of thumb, issue them when advised to do so by IBM Support or you're absolutely certain there's no alternative.
In 99% of cases there's an alternative.
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| shashivarungupta |
| Posted: Wed Jun 17, 2009 4:35 am Post subject: |
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Grand Master
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| Vitor wrote: |
| shashivarungupta wrote: |
| try to avoid these commands until there is/are valid reason/s to shoot these commands. |
As a rule of thumb, issue them when advised to do so by IBM Support or you're absolutely certain there's no alternative.
In 99% of cases there's an alternative. |
Thats what I meant. Though it was 'hidden saying' in that post. 
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| PeterPotkay |
| Posted: Wed Jun 17, 2009 8:44 pm Post subject: |
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Poobah
Joined: 15 May 2001
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| Vitor wrote: |
| PeterPotkay wrote: |
RESET CLUSTER needs to be run from a Full Repository. REFRESH CLUSTER can be run from any QM in the cluster.
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But REFRESH CLUSTER is more fun from an FR. You get amusing wailing noises from the network people....
I stand by the "when". |
That is all true, but when you actually need to run REFRESH CLUSTER, you need to run it from a specific QM that requires it, not from any QM in the cluster. REFRESH CLUSTER does not refresh the cluster.
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Peter Potkay
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| shashivarungupta |
| Posted: Wed Jun 17, 2009 10:10 pm Post subject: |
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Grand Master
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Location: Floating in space on a round rock.
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| Vitor wrote: |
| shashivarungupta wrote: |
| try to avoid these commands until there is/are valid reason/s to shoot these commands. |
As a rule of thumb, issue them when advised to do so by IBM Support or you're absolutely certain there's no alternative.
In 99% of cases there's an alternative. |
On MQSeries for OS/390 you can use a security profile to protect the command and prevent it from being issued.
Peter
| Quote: |
| but when you actually need to run REFRESH CLUSTER, you need to run it from a specific QM that requires it, not from any QM in the cluster. REFRESH CLUSTER does not refresh the cluster. |
REFRESH CLUSTER(clustername)
The queue manager from which you issue this command loses all the information in its repository concerning the named cluster. It would be a fresh start for the QM to maintain the repos. information.
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| varunv |
| Posted: Thu Jun 18, 2009 1:09 am Post subject: REFRESH CLUSTER |
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Novice
Joined: 04 Feb 2009
Posts: 16
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In which scenario we use REFRESH CLUSTER.How to remove qmanager from FR,can i use RESET CLUSTER(CLUSNAME) QMNAME(QMNAME) ACTION(FORCEREMOVE)
(OR)
ALTER QMGR REPOS(' ') REPOSNL(' ')
SUSPEND QMGR CLUSTER(CLUSNAME)
REMOVE CLUSSDR CHANNEL
DELETE CLUSRCVR CHANNEL
REFRESH CLUSTER(CLUSNAME) REPOS(YES)
WHICH ONE IS CORRECT CAN ANY ONE HELP ME ABT THIS. |
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| Vitor |
| Posted: Thu Jun 18, 2009 1:24 am Post subject: Re: REFRESH CLUSTER |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| varunv wrote: |
| WHICH ONE IS CORRECT CAN ANY ONE HELP ME ABT THIS. |
One of those procedures is given in the Clusters manual as the correct way to do it. The other is given as a last resort when the correct means has failed.
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| sumit |
| Posted: Fri Jun 19, 2009 7:30 am Post subject: Re: REFRESH CLUSTER |
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Partisan
Joined: 19 Jan 2006
Posts: 398
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| varunv wrote: |
| In which scenario we use REFRESH CLUSTER. |
All previous posts explains well about REFRESH CLUSTER. See it like, RE-FRESH CLUSTER, means 'refresh' all cluster info by dropping whtever qmgr had and taking all new.
| varunv wrote: |
| How to remove qmanager from FR |
Question is not clear. You remove qmgr from cluster but not from FR. FR automatically reflects the cluster info.
| varunv wrote: |
| can i use RESET CLUSTER(CLUSNAME) QMNAME(QMNAME) ACTION(FORCEREMOVE) |
Only required when something terrible had happened and ur qmgr is not a part of cluster but FR is still holding it's definition. (it's one of the few possible scenarios)
Last resort, MQ mannuals.. there is seperate section for both.
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Sumit |
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| exerk |
| Posted: Fri Jun 19, 2009 7:46 am Post subject: Re: REFRESH CLUSTER |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| sumit wrote: |
| ...Last resort, MQ mannuals... |
WRONG! FIRST resort, the manuals...LAST resort, MQSeries.net.
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| sumit |
| Posted: Fri Jun 19, 2009 7:57 am Post subject: Re: REFRESH CLUSTER |
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Partisan
Joined: 19 Jan 2006
Posts: 398
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| exerk wrote: |
| sumit wrote: |
| ...Last resort, MQ mannuals... |
WRONG! FIRST resort, the manuals...LAST resort, MQSeries.net. |
True, .
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Sumit |
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