[slurm-users] ssh-keys on computenodes?

[gilles at rist.or.jp]

Durai,

A high quality MPI implementation uses SLURM (e.g. srun) to spawn MPI 
tasks/daemons, and hence does not require (passwordless) SSH between 
nodes.



Cheers,



Gilles

----- Original Message -----

Hi,

we are setting up a slurm cluster and are at the stage of adding ssh 
keys of the users to the nodes.

I thought it would be sufficient to add the ssh keys of the users to 
only the designated login nodes. But I heard that it is also necessary 
to add them to the compute nodes as well for slurm to be able to submit 
jobs of the users successfully. Apparently this is true especially for 
MPI jobs.

So is it true that ssh keys of the users must be added to the ~/.ssh/
authorized_keys of *all* nodes and not just the login nodes?

Thanks,
Durai

 
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