Translations:Advanced MPI scheduling/30/en
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If you need more memory per node than the smallest node provides (e.g. more than 125 GiB at Graham) then you should not use --mem=0, but request the amount explicitly. Furthermore, some memory on each node is reserved for the operating system. To find the largest amount your job can request and still qualify for a given node type, see the Available memory column of the Node characteristics table for each cluster.