[torqueusers] Hogging Nodes
prakash.velayutham at cchmc.org
Fri Mar 20 09:06:06 MDT 2009
What is the program you are running? May be it already supports this.
On Mar 20, 2009, at 10:55 AM, Sarah Mulholland wrote:
> There are a lot of great suggestions, but none seem to fit our
> situation exactly. Yes, we only want to affect the usage in
> question (a particular program or two). In the general case we want
> all processors on all nodes to be available.
> The ppn=2 solution might be the best approach if we could write a
> little bit of software to make half the jobs do nothing.
> Thank you to everyone who replied.
> -----Original Message-----
> From: Gareth.Williams at csiro.au [mailto:Gareth.Williams at csiro.au]
> Sent: Thursday, March 19, 2009 5:07 PM
> To: Sarah Mulholland
> Cc: torqueusers at supercluster.org
> Subject: RE: [torqueusers] Hogging Nodes
>> From: Prakash Velayutham [mailto:prakash.velayutham at cchmc.org]
>> Sent: Friday, 20 March 2009 1:45 AM
>> To: Sarah Mulholland
>> Cc: torqueusers at supercluster.org
>> Subject: Re: [torqueusers] Hogging Nodes
>> May be
>> NODEACCESSPOLICY SINGLEJOB
>> will do?
>> On Mar 18, 2009, at 7:47 PM, Sarah Mulholland wrote:
>> I sent this question to the maui group over a week ago, but there
>> was no
>> answer. Perhaps this question is more appropriate to the torque
>> I am running the maui scheduler 3.2.6 patch level 16 with torque
>> 2.1.6. I
>> am looking for a way to submit a job on some number of nodes, say
>> 10. In
>> addition to running on 10 nodes, I want exclusive use of those
>> nodes. Is
>> there a property I can set to allow that kind of scheduling? So
>> far I'm
>> submitting jobs with
>> "-l nodes=10:ppn=1"
>> Specifically I have a job that needs to run on 10 processors all on
>> different nodes. We have two processors per node. The
>> EXACTNODE makes sure our job gets what it needs, but I want to
>> anything else from running on the second processor of the 10 nodes.
>> Is there a "don't-share-the-nodes" modifier that I can set on the job
>> submission? In the maui.cfg?
> Hi Sarah,
> You seem to have the solution now, but this will globally affect all
> jobs and this may not be desirable if you have a mixed workload.
> You could use the softer approach of submitting the jobs in question
> "-l nodes=10:ppn=2" and then just only running 10 processes. You
> may need to customize your options used with mpi in this case, but
> it would only affect the usage in question and not all users.
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> torqueusers at supercluster.org
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