Normally you would have one Broker on one machine.
For performance minded applications you would multi-thread the input node to the queue. This can be configured in the BAR file prior to deployment. This reaches a saturation point. The next step you take is to create multiple execution groups and deploy the message flow to these additional EG and then start vamping up your threading. Multiple EG also reach a saturation point with respect to the boxs resources. At this point you would consider an additional broker on another machine with clustering load balancing the two machines to TRY to even out the processing.
Another aspect to remember when designing your EG and deploy configuration. Never check the (I think, without looking it up the exact lingo) the "FAST/TRUSTED attribute when defining the broker. This puts the EG under the Broker address space. EG goes down!! Bye, Bye Broker. One guy was doing this on a project and was driving us NUTS. We had scripts for creating the (2.1) broker. He had his own which had this value because her read "performance add in" in the doc without reading further. We were seeing the reason for the failure of the broker but our create scripts said another. It finally came out of his mouth as a side conversation. Once corrected the broker became stable again. Also you should try to keep key critical applications out of the same EGs as nonkey applications. Say a reporting vs a financial money transfer application. If the reporting applicat takes a hard hit it could take down the EG and leave your financial app in the basket. The EG will try to restart but it may incur the same problem and go down again effecting your critical app.
From: W Samuel <[EMAIL PROTECTED]> Reply-To: MQSeries List <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: Brokers or Execution Groups Date: Wed, 3 Nov 2004 10:39:26 +0000
Hi Everyone,
On a single machine, Is it better to have 2 or more brokers or a single broker with many execution groups?
Thanks, Samuel
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