For later reference, [1] should be the (current) authoritative source on data types for the job_desc values: some strings, some numbers, some booleans.
[1] https://github.com/SchedMD/slurm/blob/4c21239d420962246e1ac951eda90476283e7af0/src/plugins/job_submit/lua/job_submit_lua.c#L450 From: slurm-users <slurm-users-boun...@lists.schedmd.com> on behalf of Christopher Benjamin Coffey <chris.cof...@nau.edu> Date: Tuesday, February 22, 2022 at 11:02 AM To: Slurm User Community List <slurm-users@lists.schedmd.com> Subject: Re: [slurm-users] Can job submit plugin detect "--exclusive" ? External Email Warning This email originated from outside the university. Please use caution when opening attachments, clicking links, or responding to requests. ________________________________ Hi Greg, Thank you! The key was to use integer boolean instead of true/false. It seems this is inconsistent for job_desc elements as some use true/false. Have a great one! Best, Chris -- Christopher Coffey High-Performance Computing Northern Arizona University 928-523-1167 On 2/18/22, 9:09 PM, "slurm-users on behalf of Greg Wickham" <slurm-users-boun...@lists.schedmd.com on behalf of greg.wick...@kaust.edu.sa> wrote: Hi Chris, You mentioned “But trials using this do not seem to be fruitful so far.” . . why? In our job_submit.lua there is: if job_desc.shared == 0 then slurm.user_msg("exclusive access is not permitted with GPU jobs.") slurm.user_msg("Remove '--exclusive' from your job submission script") return ESLURM_NOT_SUPPORTED end and testing: $ srun --exclusive --time 00:10:00 --gres gpu:1 --pty /bin/bash -i srun: error: exclusive access is not permitted with GPU jobs. srun: error: Remove '--exclusive' from your job submission script srun: error: Unable to allocate resources: Requested operation is presently disabled In slurm.h the job_descriptor struct has: uint16_t shared; /* 2 if the job can only share nodes with other * jobs owned by that user, * 1 if job can share nodes with other jobs, * 0 if job needs exclusive access to the node, * or NO_VAL to accept the system default. * SHARED_FORCE to eliminate user control. */ If there’s a case where using “.shared” isn’t working please let us know. -Greg From: slurm-users <slurm-users-boun...@lists.schedmd.com> on behalf of Christopher Benjamin Coffey <chris.cof...@nau.edu> Date: Saturday, 19 February 2022 at 3:17 am To: slurm-users <slurm-users@lists.schedmd.com> Subject: [EXTERNAL] [slurm-users] Can job submit plugin detect "--exclusive" ? Hello! 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. 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. 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. Thanks! :) Best, Chris -- Christopher Coffey High-Performance Computing Northern Arizona University 928-523-1167
