Re: [HTCondor-users] Drained 0 machines

[Stefano Dal Pra <stefano.dalpra@xxxxxxxxxxxx>]

Il 17/07/20 21:27, Beyer, Christoph ha scritto:
> Hi,
>
> look for DEFRAG_REQUIREMENTS & DEFRAG_WHOLE_MACHINE_EXPR
I did.

The DEFRAG_REQUIREMENTS expression match ~ 400 nodes

DEFRAG_WHOLE_MACHINE_EXPR matches 4 nodes (2 of which not eligible for draining)

I increased DefragLog verbosity and now i see a reason:

[...]
07/17/20 21:22:14 Skipping slot1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: because it is already running as a whole machine.
07/17/20 21:22:14 Skipping slot1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: because it is already running as a whole machine.
[...]

And i think this is because i had
DEFRAG_WHOLE_MACHINE_EXPR = ((Cpus == TotalCpus) || (Cpus >= 8)) && (StartJobs =?= True)

and all the skipped machines already have a 8-core job running.
I changed DEFRAG_WHOLE_MACHINE_EXPR to
((Cpus == TotalCpus) || (Cpus >= 16)) && (StartJobs =?= True)

and now i see more machines are put on draining.

Thanks,
Stefano
> These knobs define the requirements which machines can be drained and what is considered a drained machine
>
> for ex:
>
> # machine should be partiionable and online
> DEFRAG_REQUIREMENTS = PartitionableSlot && Offline=!=True
> # drain down to a blob of 12 online cores
> DEFRAG_WHOLE_MACHINE_EXPR = Cpus == 12 && Offline=!=True
>
> Best
> christoph