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| Cluster Sender Channel & Cluster Transmission Queue |
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| LearnMQSI |
 Posted: Mon Dec 09, 2002 8:04 am Post subject: Cluster Sender Channel & Cluster Transmission Queue |
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Centurion
Joined: 20 Aug 2002
Posts: 137
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Hi MQ Experts,
I have a couple of questions:
1. In clustering environment, can I have more than one Cluster Sender
Channels to point to same Destination Queue Manager?
I'm thinking of having one Cluster Sender Channel with Exit program
and the other one is without Exit program
2. Can I have more than one Transmission Queues in Clustering
environment to use beside SYSTEM.CLUSTER.TRANSMIT.QUEUE?
Any idea or help will be great help and appreciated
Thankyou,
LEARNMQSI |
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| bduncan |
| Posted: Mon Dec 09, 2002 12:25 pm Post subject: |
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Padawan
Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley
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1. Typically you don't manually define cluster sender channels, they are defined dynamically; the only exception to this is the cluster sender/receiver channel pair you create on a new queue manager (pointing to one of the full repositories) to add it to the cluster. If you manually define other instances (in addition to those created dynamically) it's not going to gain you anything because you will not have the ability to control which one messages flow across. This is because they will both use the same transmit queue, and there are no remote queue definitions for clustered queues.
2. Again, because you don't have remote queue definitions for clustered queues, you never specify which transmit queue or sender channel they are associated with, so messages bound for clustered queues will always go via the SYSTEM.CLUSTER.TRANSMIT.QUEUE.
_________________
Brandon Duncan
IBM Certified MQSeries Specialist
MQSeries.net forum moderator |
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| nimconsult |
| Posted: Mon Dec 09, 2002 11:59 pm Post subject: |
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Master
Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium
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1.
Yes you can create multiple static cluster channel sender / cluster channel receiver pairs between queue managers of a cluster. MQ Series will transmit messages evenly between the two channels.
I am not quite sure of the performance benefit you can expect from this if you communicate over the same wire. I have never tested the difference of throughput but I would be interested in knowing the result.
If you have multiple network adapters then maybe the performance increase becomes clear.
Also you must know that by creating multiple paths to the same destination, you cannot expect the message sequence to be maintained.
2.
No you cannot use multiple transmission queue. And this is to me one weakness of clusters in term of performance.
Nicolas
_________________
Nicolas Maréchal
Senior Architect - Partner
NIMCONSULT Software Architecture Services (Belgium)
http://www.nimconsult.be |
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| LearnMQSI |
| Posted: Tue Dec 10, 2002 11:18 am Post subject: Cluster Sender Channel & Cluster Transmission Queue |
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Centurion
Joined: 20 Aug 2002
Posts: 137
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bduncan & nimconsult,
Thank you so much for your help. I appreciate it. Now its clear. |
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