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| ThreadPooling of message flows? |
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| JYama |
 Posted: Tue Oct 23, 2007 10:18 pm Post subject: ThreadPooling of message flows? |
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Master
Joined: 27 Mar 2002
Posts: 281
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Hello, experts,
Does anybody know about the spec of thread-pooling of WMBv6?
How threads are assigned during message processing?
It may be an internal spec which is undisclosed?
Regards, |
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| elvis_gn |
| Posted: Tue Oct 23, 2007 10:45 pm Post subject: |
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Padawan
Joined: 08 Oct 2004
Posts: 1905
Location: Dubai
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Hi JYama,
Nothing undisclosed about it, I think....it's available in the Infocenter.
Basics, 1 thread for each flow, if additional instances is specified as X, then for every incoming message, thread increases until X....
Regards. |
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| JYama |
| Posted: Tue Oct 23, 2007 10:59 pm Post subject: |
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Master
Joined: 27 Mar 2002
Posts: 281
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| elvis_gn wrote: |
Basics, 1 thread for each flow, if additional instances is specified as X, then for every incoming message, thread increases until X....
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Thank you very much for your information, elvis_gn.
Let me ask you one question.
Does it mean that all threads will be permanently kept once the number of threads reached to the number X? |
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| elvis_gn |
| Posted: Tue Oct 23, 2007 11:30 pm Post subject: |
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Padawan
Joined: 08 Oct 2004
Posts: 1905
Location: Dubai
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Hi JYama,
| JYama wrote: |
| Does it mean that all threads will be permanently kept once the number of threads reached to the number X? |
No, the thread will die when the processing of the flow is over...
Regards. |
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| JYama |
| Posted: Tue Oct 23, 2007 11:39 pm Post subject: |
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Master
Joined: 27 Mar 2002
Posts: 281
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| elvis_gn wrote: |
No, the thread will die when the processing of the flow is over...
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I see. 
In default, only one thread(instance) exists and additional instances will be created in the case of multiple messages arrive.
Thanks,  |
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| Bill.Matthews |
| Posted: Wed Oct 24, 2007 3:27 am Post subject: |
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Master
Joined: 23 Sep 2003
Posts: 232
Location: IBM (Retired)
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There is an exception to the thread allocation - when there is only one Input node in the flow, the statement is correct.
However, when there are multiple Input nodes in the flow, each one will be allocated a thread.
Prior to V6.1 (which introduces an improved allocation method), when additional instances are defined - and if one Input node is very active, then it is possible for that node to consume all of the additional instances and thus limit the other node to a single thread.
With V6.1 - we will have the ability to allocate additional instances and identify how many go to each Input node.
_________________
Bill Matthews |
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