Translations:Abaqus/114/en

To completely satisfy the recommended "MEMORY TO OPERATIONS REQUIRED MINIMIZE I/O" (MRMIO) value, at least the same amount of non-swapped physical memory (RES) must be available to Abaqus. Since the RES will in general be less than the virtual memory (VIRT) by some relatively constant amount for a given simulation, it is necessary to slightly over-allocate the requested Slurm node memory -mem=. In the above sample Slurm script, this over-allocation has been hardcoded to a conservative value of 3072MB based on initial testing of the standard Abaqus solver. To avoid long queue wait times associated with large values of MRMIO, it may be worth investigating the simulation performance impact associated with reducing the RES memory that is made available to Abaqus significantly below the MRMIO. This can be done by lowering the -mem= value which in turn will set an artificially low value of memory= in the Abaqus command (found in the last line of the slurm script). In doing this one should be careful the RES does not dip below the MINIMUM MEMORY REQUIRED (MMR) otherwise Abaqus will exit due to Out of Memory (OOM). As an example, if your MRMIO is 96GB try running a series of short test jobs with #SBATCH --mem=8G, 16G, 32G, 64G until an acceptable minimal performance impact is found, noting that smaller values will result in increasingly larger scratch space used by temporary files.