Sorry Mahmood, 10 GB per node is requested not 200 GB per node. For all nodes this counts in total to 40 GB as you request 4 nodes. The number of tasks per node does not matter for this limit.
Best ;-) Sebastian Sebastian Kraus Team IT am Institut für Chemie Gebäude C, Straße des 17. Juni 115, Raum C7 Technische Universität Berlin Fakultät II Institut für Chemie Sekretariat C3 Straße des 17. Juni 135 10623 Berlin Tel.: +49 30 314 22263 Fax: +49 30 314 29309 Email: sebastian.kr...@tu-berlin.de ________________________________ From: slurm-users <slurm-users-boun...@lists.schedmd.com> on behalf of Mahmood Naderan <mahmood...@gmail.com> Sent: Monday, December 16, 2019 07:56 To: Slurm User Community List Subject: Re: [slurm-users] Question about memory allocation >your job will be only runnable on nodes that offer at least 200 GB main memory >(sum of memory on all sockets/cpu of >the node) But according to the manual --mem=<size[units]> Specify the real memory required per node. so, with #SBATCH --mem=10GB #SBATCH --nodes=4 #SBATCH --ntasks-per-node=5 the total requested memory should be 40GB and not 200GB. Regards, Mahmood On Mon, Dec 16, 2019 at 10:19 AM Mahmood Naderan <mahmood...@gmail.com<mailto:mahmood...@gmail.com>> wrote: >No, this indicates the amount of residual/real memory as reqeusted per node. >Your job will be only runnable on nodes >that offer at least 200 GB main >memory (sum of memory on all sockets/cpu of the node). Please also have a >closer look >at man sbatch. Thanks. Regarding the status of the nodes, I see RealMemory=120705 AllocMem=1024 FreeMem=309 Sockets=32 Boards=1 The question is why freemem is so much low while allocmem is far less than realmemory? Regards, Mahmood On Mon, Dec 16, 2019 at 10:12 AM Kraus, Sebastian <sebastian.kr...@tu-berlin.de<mailto:sebastian.kr...@tu-berlin.de>> wrote: Hi Mahmood, >> will it reserve (looks for) 200GB of memory for the job? Or this is the hard >> limit of the memory required by job? No, this indicates the amount of residual/real memory as reqeusted per node. Your job will be only runnable on nodes that offer at least 200 GB main memory (sum of memory on all sockets/cpu of the node). Please also have a closer look at man sbatch. Best Sebastian Sebastian Kraus Team IT am Institut für Chemie Technische Universität Berlin Fakultät II Institut für Chemie Sekretariat C3 Straße des 17. Juni 135 10623 Berlin Email: sebastian.kr...@tu-berlin.de<mailto:sebastian.kr...@tu-berlin.de> ________________________________ From: slurm-users <slurm-users-boun...@lists.schedmd.com<mailto:slurm-users-boun...@lists.schedmd.com>> on behalf of Mahmood Naderan <mahmood...@gmail.com<mailto:mahmood...@gmail.com>> Sent: Monday, December 16, 2019 07:19 To: Slurm User Community List Subject: [slurm-users] Question about memory allocation Hi, If I write #SBATCH --mem=10GB #SBATCH --nodes=4 #SBATCH --ntasks-per-node=5 will it reserve (looks for) 200GB of memory for the job? Or this is the hard limit of the memory required by job? Regards, Mahmood
