[slurm-users] Slurm reservation for migrating user home directories

[Ole Holm Nielsen]

I need to migrate several sets of user home directories from an old NFS 
file server to a new NFS file server.  Each group of users belong to 
specific Slurm accounts organized in a hierarchical tree.

I want to make the migration while the cluster is in full production mode 
for all the other accounts (the terms "service window" or "downtime" don't 
exist for me :-)

My idea is to make a Slurm reservation so that the accounts in question 
will have zero jobs running during the reservation, and I also need to 
kick users off the login nodes.  During the reservation I can rsync the 
home directories from the old NFS server to the new NFS server and update 
the NFS automounter links.

Question:  Does anyone have experiences with this type of scenario?  Any 
good ideas or suggestions for other methods for data migration?

Thanks,
Ole

-- 
Ole Holm Nielsen
PhD, Senior HPC Officer
Department of Physics, Technical University of Denmark