[slurm-users] Array Job Node Allocation

Emyr James ej4 at sanger.ac.uk
Wed Mar 21 00:54:26 MDT 2018

Dear all,

I would like to be able to have an array job load nodes with a 
round-robin allocation instead of what seems to be the default method of 
loading the first node till full before moving on to the next node. Our 
cluster is used for bioinformatics and jobs tend to be serial high 
throughput with one or a few threads on a node as opposed to jobs being 
distributed across nodes. The default whereby nodes are filled 
sequentially doesn't work well for us given that jobs tend to be i/o bound.

I've seen the thread starting at 
https://groups.google.com/d/msg/slurm-users/uiKuFF8C-kU/mnJ1VcESBwAJ but 
I can't see the solution mentioned there (periodically setting node 
weights according to load) working for array jobs as it submits jobs in 

The LLN strategy seems to be what I'm after but as in the thread above I 
can't get it to work. Has anyone managed to get this working ?



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