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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Chris,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">You mentioned “</span>But trials using this do not seem to be fruitful so far.” . . why?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In our job_submit.lua there is:<br>
<br>
<span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> if job_desc.shared == 0 then<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> slurm.user_msg("exclusive access is not permitted with GPU jobs.")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> slurm.user_msg("Remove '--exclusive' from your job submission script")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> return ESLURM_NOT_SUPPORTED<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> end<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">and testing:<br>
<br>
$ srun --exclusive --time 00:10:00 --gres gpu:1 --pty /bin/bash -i <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">srun: error: exclusive access is not permitted with GPU jobs.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">srun: error: Remove '--exclusive' from your job submission script<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">srun: error: Unable to allocate resources: Requested operation is presently disabled<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">In slurm.h the job_descriptor struct has:<br>
<br>
uint16_t shared; /* 2 if the job can only share nodes with other<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> * jobs owned by that user,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> * 1 if job can share nodes with other jobs,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> * 0 if job needs exclusive access to the node,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> * or NO_VAL to accept the system default.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> * SHARED_FORCE to eliminate user control. */<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">If there’s a case where using “.shared” isn’t working please let us know.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> -Greg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">slurm-users <slurm-users-bounces@lists.schedmd.com> on behalf of Christopher Benjamin Coffey <Chris.Coffey@nau.edu><br>
<b>Date: </b>Saturday, 19 February 2022 at 3:17 am<br>
<b>To: </b>slurm-users <slurm-users@lists.schedmd.com><br>
<b>Subject: </b>[EXTERNAL] [slurm-users] Can job submit plugin detect "--exclusive" ?<o:p></o:p></span></p>
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Hello!<br>
<br>
The job_submit plugin doesn't appear to have a way to detect whether a user requested "--exclusive". Can someone confirm this? Going through the code: src/plugins/job_submit/lua/job_submit_lua.c I don't see anything related. Potentially "shared" could be possible
in some way. But trials using this do not seem to be fruitful so far.<br>
<br>
If a user requests --exclusive, I'd like to append "--exclude=<nodes>" on to their job request to keep them off of certain nodes. For instance, we have our gpu nodes in a default partition with a high priority so that jobs don't land on them until last. And
this is the same for our highmem nodes. Normally this works fine, but if someone asks for "--exclusive" this will land on these nodes quite often unfortunately.<br>
<br>
Any ideas? Of course, I could take these nodes out of the partition, yet I'd like to see if something like this would be possible.<br>
<br>
Thanks! :)<br>
<br>
Best,<br>
Chris<br>
<br>
-- <br>
Christopher Coffey<br>
High-Performance Computing<br>
Northern Arizona University<br>
928-523-1167<br>
<br>
<o:p></o:p></p>
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