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MQSeries Publish/Subscriber with out MQSI |
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venkat kurra |
Posted: Fri Dec 14, 2001 1:14 pm Post subject: |
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Master
Joined: 18 Oct 2001 Posts: 245 Location: Bloomington , IL
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sjackson |
Posted: Mon Dec 17, 2001 8:56 am Post subject: |
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Apprentice
Joined: 28 Jun 2001 Posts: 26 Location: Milwaukee
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mpuetz |
Posted: Thu Jan 10, 2002 11:51 am Post subject: |
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Centurion
Joined: 05 Jul 2001 Posts: 149 Location: IBM/Central WebSphere Services
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Hi,
MQ Pub/Sub is OK for small & midsize Pub/Sub szenarios. However if you need lot's of retained messages for your application, keep your paws off, since the support pack broker uses MQ to persistently store retained messages.
If you have lots (say more than 1000) of them the broker has to browse through every message on the queue to find the topic (unless you create a lot of topic streams which then becomes an administration issue). Since MQ doesn't have an index on the topic that's a very slow process. MQSI is much, much better in this respect since it uses DB2 to store retained messages and keeps an index on the topics.
If you only need fire & forget it's fast enough for most scenarios. The security concept is hard to maintain if you have many users. MQSI uses a user name service
which makes this a lot easier and also has access control lists.
So think twice on your needs, before you conlcude the support pack is good enough for you or whether need the full MQSI product, which is expensive unfortunately !
_________________ Mathias Puetz
IBM/Central WebSphere Services
WebSphere Business Integration Specialist |
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