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hpc:faq [2022/06/30 14:00]
Yann Sagon 		hpc:faq [2023/12/13 08:37] (current)
Yann Sagon [Can I run interactive tasks ?]
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 </code> </code>
  
 +==== I'm leaving UNIGE, can I continue to use Baobab HPC service? ==== 
 +Yes it is possible as long as you collaborate tightly with your former research group. Your PI must invite you as [[hpc:access_the_hpc_clusters#outsider_account|outsider]]. For technical reason, your account needs to be expired prior doing the request for the invitation. 
 +We'll then reactivate your account. You'll keep your data.
 ===== Storage ===== ===== Storage =====
  
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 See [[hpc/slurm#interactive_jobs|Interactive jobs]] See [[hpc/slurm#interactive_jobs|Interactive jobs]]
  
 +==== I'm not able to use all the cores of a compute node ====
 +Indeed, we are reserving two cores per node for system tasks such as data transfer, and os stuff.
 +
 +<code>
 +(yggdrasil)-[root@admin1 ~]$ scontrol show node cpu001
 +NodeName=cpu001 Arch=x86_64 CoresPerSocket=18
 +   CPUAlloc=0 CPUEfctv=34 CPUTot=36 CPULoad=0.01
 +   AvailableFeatures=GOLD-6240,XEON_GOLD_6240,V9
 +   ActiveFeatures=GOLD-6240,XEON_GOLD_6240,V9
 +   Gres=(null)
 +   NodeAddr=cpu001 NodeHostName=cpu001 Version=23.02.1
 +   OS=Linux 4.18.0-477.10.1.el8_8.x86_64 #1 SMP Tue May 16 11:38:37 UTC 2023
 +   RealMemory=187000 AllocMem=0 FreeMem=185338 Sockets=2 Boards=1
 +   CoreSpecCount=2 CPUSpecList=17,35 <==================== this means we have two specialization cores <<<<
 +   State=IDLE ThreadsPerCore=1 TmpDisk=150000 Weight=10 Owner=N/A MCS_label=N/A
 +   Partitions=debug-cpu
 +   BootTime=2023-08-10T12:08:11 SlurmdStartTime=2023-08-10T12:09:00
 +   LastBusyTime=2023-08-11T10:06:42 ResumeAfterTime=None
 +   CfgTRES=cpu=34,mem=187000M,billing=34
 +   AllocTRES=
 +   CapWatts=n/a
 +   CurrentWatts=0 AveWatts=0
 +   ExtSensorsJoules=n/s ExtSensorsWatts=0 ExtSensorsTemp=n/s
 +
 +</code>
 +
 +If you really need to use all the cores of a compute node, you can override this parameter: ''--core-spec=0''. This will implicitly lead to an exclusive allocation of the node.
 +
 +ref: https://slurm.schedmd.com/core_spec.html
  
  
hpc/faq.1656590454.txt.gz · Last modified: 2022/06/30 14:00 by Yann Sagon

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