A restart of the condor_startd is required for changes to this configuration variable to take effect.
And I just directly though that we'd need a full condor restart, so it wouldn't make what we need.
Of course, if a condor_reconfig is enough, that would fit our needs! Joan On 14/5/20 18:13, John M Knoeller wrote:
Are you saying that changing OFFLINE_MACHINE_RESOURCE_<name> in the config and then running condor_reconfig does not take the GPU offline? If it does not, I would consider that bug. -tj -----Original Message----- From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> On Behalf Of Joan Josep Piles-Contreras Sent: Thursday, May 14, 2020 4:41 AM To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx> Subject: [HTCondor-users] Removing / disabling GPUs without stopping jobs Hi, In a partitionable slot, is there any way to disable a given GPU without restarting the startd, or in any case to prevent it from being assigned to new jobs? In short, what `OFFLINE_MACHINE_RESOURCE_<name>` already does, just without restarting the startd (i.e. without stopping already running jobs). We have some nodes with multiple GPUs, and from time to time one of the GPUs crashes and ends up in some unstable state. The node then becomes a "black hole" because it keeps accepting jobs that then just crash. We can already detect it, but fixing it usually requires a reboot (trying to reset the card doesn't always do the trick, we already tried). What we ideally would want is to prevent the non-working card from being assigned to new jobs until we can find the right spot to reboot the node, because some jobs need a long time to run, and we want to make it as little intrusive as possible. With static slots it would be easy to just set START to false in the slot, but would it be possible to do something equivalent with dynamic slots? I fear the system will be very confused if we make the START expression conditional on the assigned GPU... Best, Joan
-- Dr. Joan Josep Piles-Contreras ZWE Scientific Computing Max Planck Institute for Intelligent Systems (p) +49 7071 601 1750
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