[HTCondor-users] Change to long GPU UUIDs

[Steffen Grunewald <steffen.grunewald@xxxxxxxxxx>]

Good afternoon,

for some very specific reason, we need to change our GPU machine setup
to report long, not shortened, GPU UUIDs (condor_gpu_discovery -uuid).
Currently the STARTD only knows about the short UUIDs, and several
dynamic slots have been created with corresponding "AssignedGPUs" set.

May I safely assume that GPU resources are indexed internally *not* by
their (short or long) UUID, so I could just do a "condor_reconfigure"
to switch to long UUIDs - or would this (a) request something more
drastic (e.g., condor_restart -startd) or (b) make the partitionable
slot lose track of resources already scheduled?

In short, should I better wait for the machine to become idle?

Thanks,
 Steffen


PS. For the curious: it turns out that "jax" supports long UUIDs in
CUDA_VISIBLE_DEVICES, and a single short UUID, but not multiple
short UUIDs. This isn't documented anywhere, and nobody seems to run
jax code in an HTCOndor context.

-- 
Steffen Grunewald, Cluster Administrator
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Am Mühlenberg 1 * D-14476 Potsdam-Golm * Germany
~~~
Fon: +49-331-567 7274
Mail: steffen.grunewald(at)aei.mpg.de
~~~