[HTCondor-users] 8.2.9 ALLOW_PSLOT_PREEMPTION

[Evan Sarmiento <esarmien@xxxxxxxxxxxxx>]

Hi All,

I installed HTCondor 8.2.9 and turned on ALLOW_PSLOT_PREEMPTION by setting it to True on all my startds, schedds, and the negotiator. I have two startds configured as such:

ALLOW_PSLOT_PREEMPTION = True

NEGOTIATOR_USE_SLOT_WEIGHTS = true

NUM_SLOTS_TYPE_1 = 1

SLOT_TYPE_1 = 100%

SLOT_TYPE_1_PARTITIONABLE = True

SLOT_WEIGHT = Cpus

STARTD_SLOT_ATTRS = 

However, when enabled, I can’t get *any* pre-emption to occur. The Negotiator doesn’t even attempt to pre-empt any jobs.

When I turn off ALLOW_PSLOT_PREEMPTION, I can pre-empt like jobs that use the same resources as expected.

Has anyone else run into this?

I dug into the source code a little and it appears like jobs that want pslot preemption need ‘WantPslotPreemption’ in the ClassAd request, just to make sure, I made a job like this and even set nice_user so it could defenitley be pre-empted by any other job, but, no pre-emption occurs.

executable = /usr/bin/yes

universe = vanilla

output = /dev/null

error = /dev/null

log = /dev/null

nice_user = True

+WantPslotPreemption = True

queue 11

Any ideas?

Best,

Evan

Evan Sarmeinto

Front End Systems Software Developer

Harvard-MIT Data Center

T: 617-384-5876

E: esarmien@xxxxxxxxxxxxx

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