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cluster:218 [2022/07/02 19:36]
hmeij07 [Rocky8 Slurm Template] 		cluster:218 [2023/10/14 19:24] (current)
hmeij07 [Resources]
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   * August 2022 is designated **migration** period   * August 2022 is designated **migration** period
   * Queues ''hp12'' and ''mwgpu'' (centos6) will be serviced by Openlava, not Slurm   * Queues ''hp12'' and ''mwgpu'' (centos6) will be serviced by Openlava, not Slurm
 +
 +
 +==== Quick Start Slurm  Guide ====
 +
 +Jump to the **Rocky8/CentOs7 script templates** listed in the menu of this page, top right.
 +
 +There is also detailed information on Amber20/Amber22 on this page with script examples.
 +
 +  * [[cluster:214|Tada]] new head node
  
 ==== Basic Commands ==== ==== Basic Commands ====
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 # sorta like bhosts -l # sorta like bhosts -l
  scontrol show node n78  scontrol show node n78
 +
 +# sorta like bstop/bresume
 +scontrol suspend job 1000001
 +scontrol resume job 1000001 
  
 # sorta like bhist -l # sorta like bhist -l
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 You must request **resources**, that is for example number of cpu cores or which gpu model to use. ** If you do not request resources, Slurm will assume you need all the node's resources** and thus prevent other jobs from running on that node. You must request **resources**, that is for example number of cpu cores or which gpu model to use. ** If you do not request resources, Slurm will assume you need all the node's resources** and thus prevent other jobs from running on that node.
 +
 +Details
 +
 +  * https://slurm.schedmd.com/cons_res_share.html
  
 Some common examples are:  Some common examples are: 
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 #SBATCH -n 8     # tasks=S*C*T #SBATCH -n 8     # tasks=S*C*T
 #SBATCH -B 2:4:1 # S:C:T=sockets/node:cores/socket:threads/core #SBATCH -B 2:4:1 # S:C:T=sockets/node:cores/socket:threads/core
 +#SBATCH --mem=250           # needed to override oversubscribe
 +#SBATCH --ntasks-per-node=1 # perhaps needed to override oversubscribe
 +#SBATCH --cpus-per-task=1   # needed to override oversubscribe
 +
  
 GPU control GPU control
-#SBATCH --cpus-per-gpu=1 +#SBATCH --cpus-per-gpu=1                  # needed to override oversubscribe 
-#SBATCH --mem-per-gpu=7168+#SBATCH --mem-per-gpu=7168                # needed to override oversubscribe
 #SBATCH --gres=gpu:geforce_gtx_1080_ti:1  # n[78], amber128 #SBATCH --gres=gpu:geforce_gtx_1080_ti:1  # n[78], amber128
 #SBATCH --gres=gpu:geforce_rtx_2080_s:1   # n[79-90], exx96 #SBATCH --gres=gpu:geforce_rtx_2080_s:1   # n[79-90], exx96
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 </code> </code>
 +
 +** Pending Jobs  **
 +
 +I keep having to inform users that with -n 1 and -cpu 1 your job can still go in pending state because user forgot to reserve memory ... so silly slurm assumes your job needs all the node's memory. Here is my template then
 +
 +<code>
 +
 +FirstName, your jobs are pending because you did not request memory 
 +and if not then slurm assumes you need all memory, silly. 
 +Command "scontrol show job JOBID" will reveal ...
 +
 +JobId=1062052 JobName=3a_avgHbond_CPU
 +   NumNodes=1 NumCPUs=1 NumTasks=1 CPUs/Task=1 ReqB:S:C:T=0:0:1:1
 +   TRES=cpu=1,mem=191047M,node=1,billing=1    <---------
 +
 +I looked (command "ssh n?? top -u username -b -n 1", look for the VIRT value) 
 +and you need less than 1G per job so with --mem=1024 and n=1 and cpu=1 
 +you should be able to load 48 jobs onto n100. 
 +Consult output of command "sinfo -lN"
 +
 +</code>
 +
  
 ==== MPI ==== ==== MPI ====
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 #SBATCH --nodelist=n88 #SBATCH --nodelist=n88
  
 +# may or may not be needed, centos7 login env
 +source $HOME/.bashrc  
 +which ifort           # should be the parallel studio 2016 version
  
 # unique job scratch dirs # unique job scratch dirs
cluster/218.1656790584.txt.gz · Last modified: 2022/07/02 19:36 by hmeij07

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