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en:hpc:software:fluent [2018/05/08 13:31]
vrintala
en:hpc:software:fluent [2019/10/14 13:14] (current)
mnikku
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 ## Define the number of parallel tasks, i.e. how many processors you wish to run your case with. Use some discretion as more processors does not automatically mean a faster solution and each processor reserves one license, which we have a limited number. As a rough rule, you should use max. 8 tasks for cases with less than 500 000 cells and max. 16 tasks for cases between 500 000 and 1 000 000 cells. Cases with more than 1 000 000 cells you can consider spreading on more processors, but remember that the currently available licenses limit the total number of processes to 24 and that will reserve all of the parallel licenses we have in our common use! If running your case takes several days do not reserve all of the parallel licenses at least without discussing with other FLUENT users. Always use the minimum of 4 tasks for your cases when running them in the cluster, otherwise run your simulation with your desktop computer. ## Define the number of parallel tasks, i.e. how many processors you wish to run your case with. Use some discretion as more processors does not automatically mean a faster solution and each processor reserves one license, which we have a limited number. As a rough rule, you should use max. 8 tasks for cases with less than 500 000 cells and max. 16 tasks for cases between 500 000 and 1 000 000 cells. Cases with more than 1 000 000 cells you can consider spreading on more processors, but remember that the currently available licenses limit the total number of processes to 24 and that will reserve all of the parallel licenses we have in our common use! If running your case takes several days do not reserve all of the parallel licenses at least without discussing with other FLUENT users. Always use the minimum of 4 tasks for your cases when running them in the cluster, otherwise run your simulation with your desktop computer.
 #SBATCH --ntasks 24 #SBATCH --ntasks 24
-## Number of licenses needed. Always specify 1 aa_r_cfd license which lets you run 16 parallel tasks. Specify one aa_r_hpc license for each additional parallel task. If ntasks > 16: Always define 1 aa_r_cfd license and then ntasks - 16 aa_r_hpc licenses. If ntasks equals 16 (or less), remove the ,aa_r_hpc:n part and just specify --licenses=aa_r_cfd:1 +## Number of licenses needed. Always specify 1 aa_r license which lets you run 16 parallel tasks. Specify one aa_r_hpc license for each additional parallel task. If ntasks > 16: Always define 1 aa_r license and then ntasks - 16 aa_r_hpc licenses. If ntasks equals 16 (or less), remove the ,aa_r_hpc:n part and just specify --licenses=aa_r:1 
-#SBATCH --licenses=aa_r_cfd:1,aa_r_hpc:8+#SBATCH --licenses=aa_r:1,aa_r_hpc:8
 ## Maximum estimated memory needed by one process in MiB. The total memory is then ntasks * mem-per-cpu. Try to estimate this based on e.g. your previous similar simulations. Nodes in the partition phase2 of Celaeno have 128 GiB of memory in total. Again, you should not reserve more memory than you need. ## Maximum estimated memory needed by one process in MiB. The total memory is then ntasks * mem-per-cpu. Try to estimate this based on e.g. your previous similar simulations. Nodes in the partition phase2 of Celaeno have 128 GiB of memory in total. Again, you should not reserve more memory than you need.
 #SBATCH --mem-per-cpu=2000 #SBATCH --mem-per-cpu=2000
 
/opt/webdata/webroot/wiki/data/pages/en/hpc/software/fluent.txt · Last modified: 2019/10/14 13:14 by mnikku
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