Re: [HTCondor-users] Reserve all cores on a server?

["Smithies, Russell" <Russell.Smithies@xxxxxxxxxxxxxxxx>]

Thanx guys,
I (eventually) came to the same conclusion - I've asked users to set request_cpus to the same number as the number of threads in their application but not to get too greedy or their jobs won't run anywhere i.e. don't request 200 cpus ;-)

--Russell


-----Original Message-----
From: HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Todd Tannenbaum
Sent: Tuesday, 14 April 2015 4:03 a.m.
To: HTCondor-Users Mail List
Subject: Re: [HTCondor-users] Reserve all cores on a server?

On 4/13/2015 9:26 AM, Greg Thain wrote:
> On 04/12/2015 06:17 PM, Smithies, Russell wrote:
>>
>> I have a problem where users are submitting jobs that are running 
>> programs with multiple threads but I'm not sure how to restrict this 
>> or to prevent other jobs running on the same server.
>>
>
> If, however, you really want to run with four threads, the job needs 
> to tell HTCondor that it needs four cores by setting
>
> Request_cpus = 4
>
> in the submit file.
>
And if you are the HTCondor system administrator, and you want to ensure that jobs do not use more CPU cores than they requested via "request_cpus" in the submit file, take a look at
   https://htcondor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToLimitCpuUsage

regards,
Todd

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