Re: [HTCondor-users] NUM_SLOTS=1 in 23.x creates partitions?

["Beaumont, Martin" <Martin.Beaumont@xxxxxxxxxxxxxxx>]

Partitionable slot (of 1) is now enabled by default on a fresh install starting with 23.0:

https://htcondor.readthedocs.io/en/latest/version-history/lts-versions-23-0.html#version-23-0-0

 

You can configure it or revert to static slots with:

 

use FEATURE: PartitionableSlot()

use FEATURE: StaticSlots()

 

https://htcondor.readthedocs.io/en/latest/admin-manual/introduction-to-configuration.html#available-configuration-templates

 

 

Martin

 

From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> On Behalf Of Beyer, Christoph
Sent: January 10, 2024 2:34 AM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: Re: [HTCondor-users] NUM_SLOTS=1 in 23.x creates partitions?

 

Hi,

 

that is the difference of a static and a partitionable slot (maybe wording is a bit different) the partitionable slot carves of a child slot that runs the job and the rest of the parent slot is negotiated in the next round. The static slot is negotiated as a whole and stays a single slot no matter how much smaller the actual job running in it is.

 

 

both slots on one EP

NUM_SLOTS = 2

 

static slot:

SLOT_TYPE_1 = cpu=1, memory=8000
SLOT_TYPE_1_PARTITIONABLE = false

partitionable slot

NUM_SLOTS_TYPE_2 = 1
SLOT_TYPE_2_PARTITIONABLE = true

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

 

---

Von: "Klint Gore" <kgore4@xxxxxxxxxx>
An: "htcondor-users" <htcondor-users@xxxxxxxxxxx>
Gesendet: Mittwoch, 10. Januar 2024 07:15:05
Betreff: [HTCondor-users] NUM_SLOTS=1 in 23.x creates partitions?

 

Does NUM_SLOTS=1 limit the machine to having only 1 slot in 23.x?  I've noticed in both 23.3 and 23.0 that slot1 is getting divided into slot1_1 and slot1_2 and 2 jobs are running where as 10.x and before didn't.

 

Or is there now another way to say I only want 1 slot on the machine regardless of how many cores it has?

 

klint

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