Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- hpc:hpc_tubit:slurm_usage:memory_limit [2019/06/24 13:07] – kraus
+++ hpc:hpc_tubit:slurm_usage:memory_limit [2019/06/24 13:07] (aktuell) – kraus
@@ Zeile 1: / Zeile 1: @@
+====== Memory Limits ======
+===== Type of Memory Limits =====
+  - Resident memory (RSS): amount real memory in use by process
+  - Virtual memory (VMem): amount of virtual memory pages allocated by process
+  - In the current cluster setup, only the limit for the real memory has to be taken into consideration for jobs (by parameter <html>--mem</html>).
+\\
+===== Properly setting Memory Limits =====
+  - The demands of your jobs for real memory (RSS) have to be carefully probed (e. g. doing test runs or or by experience ;-)) and defined.
+  - If possible, please declare memory limits within the main input (control) file of your job (e. g. <html> <span style="font-family:courier;font-size:130%">Gaussian</span> knows about the parameter <span style="font-family:courier;font-size:130%">%mem=</span></span></html>).
+  - SLURM defines a proportional factor between RSS and Vmem: ''VSizeFactor*RSS = VMem''.
+  - VMem limit (VSizeFactor=0) has not to be taken into consideration.
+  - <del>RSS limit: ''RSS = VMem limit''/''$(scontrol show config|grep VSizeFactor|awk '{print $3;}')''  and then passing via switch ''--mem='' to sbatch.</del>
+\\
+<WRAP rightalign>
+date of revision: 06-24-2019 © kraus
+</WRAP>