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Websphere CPU binding

Posted on 2003-11-17
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Last Modified: 2013-12-10
My problem is the following:
I have two E10000 domains of four CPUs. My websphere license covers 4 cpus. I want to load balance between 2 Cpus of each node (that have 4 cpus).
How can I limit Websphere to use 2 cpus only on each node ?
Is there any websphere parameters to do this ?
Or an alternative solutions (breaking in 4 domains is not possible).
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Question by:jkassad2002
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4 Comments
 
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Expert Comment

by:jerelw
ID: 9764345
The operating system load balances between the CPUs--usually, one application server, or one clone per CPU.
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Expert Comment

by:schleus
ID: 9768904
What version of WebSphere do you have?  

Do you just want to use 2 processors per node across each node for hardware level failover, or was there some other reason?

Have you considered partitioning off your E10000 into two zones isolating 2 CPU's to each zone?

Schleus
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Author Comment

by:jkassad2002
ID: 9769710
Hardware failover would be ok. Load balancing better.
We do not want to partition again in two zones: -> We might need additional Gigabit cards -> Loosing CPUs.
Websphere is the version 5.0.
Isn't it possible to use pbind or something like this ?
Websphere does it provide tools to do it ?
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Accepted Solution

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schleus earned 2000 total points
ID: 9776070
OK, in version 5 of WebSphere you can get the process ID in a file after the app server has started.  I forget the exact location, but I remember in ends in .pid.  You can write a script to take that PID and bind it to a processor.  The instructions for that are below.

http://developers.sun.com/solaris/articles/solaris_processor.html

As far as WebSphere providing a tool for it, nope.  It is OS specific.

Let me know if you need me to get you the exact location of the PID file after the app server starts.  Also keep in mind, you will need to bind the dmgr and node agent PIDs to the processor also.

Schleus
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