Re: [HTCondor-users] Dynamic slots not resizing

[Steven C Timm <timm@xxxxxxxx>]

You can play with variables such as CLAIM_WORKLIFE also to force the negotiator to get involved when the new job starts.  Generally if you have a single schedd with a claim on the partitionable slot then jobs will still keep running in the existing dynamic slot... sometimes in weird corner cases they will keep on matching and running anyway.

Steve

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From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Laborda Sanchez, Oscar (Volkswagen Group Services) <extern.Oscar.Laborda@xxxxxxx>
Sent: Thursday, March 22, 2018 9:07:17 AM
To: htcondor-users@xxxxxxxxxxx
Subject: [HTCondor-users] Dynamic slots not resizing

 

Hello,

 

I have an execution server with 16 cores using a single partitionable slot:

NUM_SLOTS = 1

NUM_SLOTS_TYPE_1 = 1

SLOT_TYPE_1 = 100%

SLOT_TYPE_1_PARTITIONABLE = true

 

When I submit several jobs like this:

·         Job0: request_cpus=16

·         job1: request_cpus=1

·         Job2: request_cpus=1

·         ...

·         JobN: request_cpus=1

 

I find that Job0 starts running in a newly created dynamic slot with all 16 cpus as expected, but when it finishes, the other 1 cpu jobs start running sequentially one at a time in the very same slot with 16 cpus (environment variable OMP_NUM_THREADS=16 for those jobs too).

I expected the 16 cpu dynamic slot to be destroyed at the end of Job0 and several new ones to be created with 1 cpu each. This is what happens when I do not send Job0 first.

 

Can this be fixed?

 

Thank you

Oscar

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