Re: [HTCondor-users] Slot weights

[Steven Timm <timm@xxxxxxxx>]

This is the Fermilab slotweight _expression_

[root@fnpc9105 ~]# condor_config_val SLOT_WEIGHT
ifThenElse( (Cpus >= ceiling(Memory/2048.0)), Cpus, Memory/2048.0)

Whatever you do make sure that there's absolutely no way your SLOT_WEIGHT can ever be undefined, very ugly things happen if it is.

Steve Timm

---

From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Jeff Templon <templon@xxxxxxxxx>
Sent: Sunday, December 21, 2025 2:59 PM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: Re: [HTCondor-users] Slot weights

 

[EXTERNAL] – This message is from an external sender

Hi Christoph.

I don’t think that has the intended effect, since it does not affect the job priority, no? The slot weight does affect the job priority as far as I can tell, which is what I want.

I found some gem on the list archives that I am trying out in test mode now.  More later!

JT


> On 21 Dec 2025, at 20:50, Beyer, Christoph <christoph.beyer@xxxxxxx> wrote:
>
> Hi Jeff,
>
> I think for steering a ranking impression in the job would be the apropriate mean ...
>
>
> 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
>
> ----- Ursprüngliche Mail -----
> Von: "Jeff Templon" <templon@xxxxxxxxx>
> An: "HTCondor-Users Mail List" <htcondor-users@xxxxxxxxxxx>
> Gesendet: Sonntag, 21. Dezember 2025 16:55:51
> Betreff: [HTCondor-users] Slot weights
>
> Hi,
>
> I am looking to use the SLOT_WEIGHT both to steer high-memory jobs to high-memory machines, and as well weight the usage of high memory jobs more than those of low memory, to make the distribution of slots to users more fair.
>
> HOWEVER:
>
> Enable use of the condor_negotiator-side resource consumption policy, allocating the job-requested number of cores to the dynamic slot, and use SLOT_WEIGHT to assess the user usage that will affect user priority by the number of cores allocated. Note that the only attributes valid within the SLOT_WEIGHT _expression_ are Cpus, Memory, and disk. This must the set to the same value on all machines in the pool.
>
> Really: the same value on all machines?  Why?  Or do I read this wrong?
>
> JT
>
>
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