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| Cluster load balancing |
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| vinbud117 |
 Posted: Tue Nov 04, 2008 5:11 am Post subject: Cluster load balancing |
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Acolyte
Joined: 22 Jul 2005
Posts: 61
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Version: 6.0.2.1
We have two QMs hosting the same Cluster queue. The properties of the QMs, the cluster receiver channel, the alias queue and base queues are exactly the same. But, all messages are flowing to only one QM and when this QM goes down, all messages pile up in the transmission queue.
I have checked particularly the priority at the channel level, queue level and QM level; they are the same on both QM.
I have also checked "Binding" property of the queue, and both are NOTFIXED.
Can anyone identify what may have gone wrong?
Thanks !! |
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| mvic |
| Posted: Tue Nov 04, 2008 5:55 am Post subject: Re: Cluster load balancing |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| vinbud117 wrote: |
I have also checked "Binding" property of the queue, and both are NOTFIXED.
Can anyone identify what may have gone wrong? |
The application code that calls MQOPEN can choose whether or not to respect the default set on the q definition. Has this been checked? |
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| Vitor |
| Posted: Tue Nov 04, 2008 6:23 am Post subject: Re: Cluster load balancing |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| vinbud117 wrote: |
I have also checked "Binding" property of the queue, and both are NOTFIXED.
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The queue setting is just the default binding, like the persistence is just the default setting. The application can put a non-persistent message on a queue with a default of persistent, and in the same way an application can specify BIND_ON_OPEN even if the default is NOTFIXED.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| PeterPotkay |
| Posted: Tue Nov 04, 2008 7:04 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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A sending application can specify the destination QM at MQOPEN / MQPUT1 time, forcing all messages to go to a particular instance of the q in the cluster.
_________________
Peter Potkay
Keep Calm and MQ On |
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| vinbud117 |
| Posted: Tue Nov 04, 2008 7:12 am Post subject: |
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Acolyte
Joined: 22 Jul 2005
Posts: 61
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The putting application is WBIMB. I checked the output node, but couldn't find any setting related to this, nor is there anything in the MQMD header.
Any suggestions? |
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