Re: [Condor-users] set a variable number of cores used

[Nathan Panike <nwp@xxxxxxxxxxx>]

Hermann:

In your config file, add

STARTD_SLOT_ATTRS = $(STARTD_SLOT_ATTRS) IsBusy
IsBusy = (State == "Claimed" && Activity == "Busy")
# Assumes work hours are 8am to 4pm
START = ($(START)) && ( (ClockMin < 480) || (ClockMin > 960) || (( slot1_IsBusy + slot2_IsBusy + slot3_IsBusy + slot4_IsBusy + slot5_IsBusy + slot6_IsBusy ) <= 4))

What will happen with this expression is that the negotiator will match
to resources, but the resources will refuse to run jobs if 4 jobs are
already running during work hours.

Nathan Panike

> Hello
> 
> I run into a tricky condor management question.
> We acquired a few new workstations. These are usually in use during the
> day and idle at night.
> However, day usage would not need all resources, most of the resources
> can be used by condor.
> Each workstation has 6 cores, 4 of them could be used during the day and
> all 6 cores during the night.
> Simply suspending jobs on the other two cores does not work due to RAM
> limitations.
> 
> Therefore we need the following:
> During daytime use only 4 (of 6) cores (e.g. calculate only 4 jobs
> simultaneously). During nights use all 6 cores.
> 
> Is there a way to do this?
> 
> Best regards,
> Hermann