Re: [HTCondor-users] How to always avoid evictions of jobs belonging to GROUP_NAMES

["Beyer, Christoph" <christoph.beyer@xxxxxxx>]

Hi Guiseppe,

I am not 100% sure that I got your question right, but here is what I know about eviction:

In case you mean eviction by the defrag-daemon you can teach the daemon what to drain and what not by these expressions:

DEFRAG_REQUIREMENTS

DEFRAG_RANK

for ex: DEFRAG_REQUIREMENTS = PartitionableSlot && Offline=!=True && GROUP_NAME =!= <your group_name_that _should_not_be_evicted>

This would exclude slots occupied by <your group_name_that _should_not_be_evicted> from being evicted. If the 'name' you are looking for is only part of the 'GROUP_NAME' you can use a regex at that place, e.g. " ... && regex(".*<part_of_name>.*", GROUP_NAME) =!= true" (that's from top of my head you have to check for correct syntax I am afraid) 

If you use ranking for this it means you can not be sure that these jobs never get evicted as the rank is only a sorted list, if you do only have the one kind of jobs or very few 'evictable jobs' you will end up with the other jobs being evicted !

The second case is preemption by the negotioator, same sitauation when it comes to ranking, a full & safe exclude would be using requirements. These are the candidates that would be used:

PREEMPTION_REQUIREMENTS (=

PREEMPTION_RANK

In both cases check the manual for more variables that may play a role for what you are tryong to achieve, for the defrag-daemon you need to start it through the master and for the negotiator to use different levels of preemption you need to enable it through the configuration !

Hope this helps ...

Best

Christoph

--
Christoph Beyer
DESY Hamburg
IT-Department

Notkestr. 85
Building 02b, Room 009
22607 Hamburg

phone:+49-(0)40-8998-2317
mail: christoph.beyer@xxxxxxx

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Von: "Giuseppe Di Biase" <giuseppe.dibiase@xxxxxxxxx>
An: "htcondor-users" <htcondor-users@xxxxxxxxxxx>
Gesendet: Freitag, 15. November 2019 09:04:38
Betreff: [HTCondor-users] How to always avoid evictions of jobs belonging to        GROUP_NAMES

Hi All,

i would like to avoid evictions of jobs belonging to a user in a GROUP_NAMES defined.

I defined this GROUP_NAMES in the node running Negotiator/Collector daemon but how and where (daemons) i must define his priority respect jobs belonging to others GROUP_NAMES?

Can i use a formula like this in SCHEDD?

IsX = (Experiment =?= "X")
IsY = (Experiment =?= "Y")
IsZ = (Experiment =?= "Z")

RANK = $(X)*70 + $(Y)*10  + $(Z)*8

Thanks a lot for you support

Giuseppe

-- 
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Giuseppe Di Biase - giuseppe.dibiase@xxxxxxxxx

European Gravitational Observatory - EGO
Via E.Amaldi - 56021 Cascina (Pisa) - IT
Phone: +39 050 752 577
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