If you have such short requests that they can be handled in 0.8 sec,
then how do you know that there are only 2 at a time being serviced?
Here is the test I would do to see how many threads are really running.
In the service code, add a sleep 60 sec call... and on the client, start
as many threads, which is hopefully larger than what you set as a max on
the GT4 container, something on the order of O(100s), and invoke the
service as fast as possible from all client threads. If for example you
had a max of 50 threads set on the GT4 container, you would see after 60
seconds that 50 invocations were completed successfully, then after
another 60 sec, another 50 invocations, etc... if indeed you only have 2
threads, then you would see only 2 at a time every 60 sec.
Now, about seeing performance difference in your own code (without the
sleep 60) as you increase the number of threads, it all depends on your
specific code and what the client/service are doing. Also, from my
experience, the client side is generally more heavy weight that the
service side... which means that you will need multiple concurrent
clients to generally saturate a given service.
Ioan
Samuel LIU wrote:
I am trying to test the service response time of a Grid service I wrote given
different request rate. By default, WS Core sets initial thread number to be 2.
When I started globus container w/ -nosec, I could not see much difference. All
requests were served within 0.8 sec. However, when I started container with GSI
Transport or GSI Secure Conversation settings, I could see clearly two requests
were served at a time.
The problem is: based on gt4 doc, when I changed thread settings to:
and restarted container, I saw no difference: still 2 requests were accepted at
one time, then another 2, ...
Can anyone suggest what went wrong? I am using globus 4.0.5 on a CentOS machine.
Thanks,
Sam.
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--
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Ioan Raicu
Ph.D. Candidate
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Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
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Email: [EMAIL PROTECTED]
Web: http://www.cs.uchicago.edu/~iraicu
http://dev.globus.org/wiki/Incubator/Falkon
http://www.ci.uchicago.edu/wiki/bin/view/VDS/DslCS
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