[slurm-users] gres.conf and select/cons_res plugin

[Patrick Goetz]

I think reading the documentation is making me more confused; maybe this 
has to do with version changes.  My current slurm cluster is using 
version 17.x

Looking at the man page for gres.conf 
(https://slurm.schedmd.com/gres.conf.html)  I see this:

NOTE: Slurm support for gres/[mps|shard] requires the use of the 
select/cons_tres plugin.

On my current (inherited) Slurm cluster we have:

   SelectType=select/cons_res

but users are primarily using GPU resources, so I know Gres is working. 
Why then is select/cons_tres required?