Re: [HTCondor-users] Python bindings schedd.edit value question

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

Hi Nick,

My suggestion to solve the below:

Instead of setting a custom classad attribute "GraceValue" to 2GB, just set "retry_request_memory=2GB" in the job description.

All done.  No need for a script ... woohoo!

See this URL for a "Tip of the month" example showing this exact problem:
    https://htcondor.org/featured-users/2026-02-06-request-variable-memory.html

If all your users are already trained to set "GraceValue" in their job submissions and you do not want to retrain people, you could make a small job transform at your AP to simply copy or rename "GraceValue" to "RetryRequestMemory".

IIRC, I think "retry_request_memory" appeared starting in HTCSS v25.2.1.

regards,
Todd



On 4/3/2026 2:32 PM, Nicholas Peregonow via HTCondor-users wrote:

> We currently have a script that looks for jobs that were held for going over RequestMemory. If the user who submitted the job added a "GraceValue" of 2GB, the script will queue edit the job, and set the RequestMemory to orig_RequestMemory + GraceValue.  Then we release the jobs.  
>
> This works in principle, but it gets a little tricky when we have a 4000 jobs in the queue all held for the same reason and but from various different users, with different GraceValues.
>
> Is it possible when using Schedd.edit() to set a classad to the literal value of another?  Currently, if i do this
>
> schedd.edit(job_id_num, 'orig_RequestMemory', 'RequestMemory').   
>
> Then when I check the value of 'orig_RequestMemory' it is set to  orig_RequestMemory=RequestMemory.  
>
> Which is fine in normal cases, but if I then do a 
>
> schedd.edit(job_id_num, 'RequestMemory', 'orig_RequestMemory+GraceValue')   it winds up in a situation where 
>
> orig_RequestMemory=RequestMemory
> RequestMemory=orig_RequestMemory+GraceValue
>
> And we no longer have a value for RequestMemory to match on.  As orig_RequestMemory doesn't appear an actual value associated with it.   Or at least, a value that I know how to verify
>
> I know I can do something like a for loop, and just feed it the already calculated value, but then that ends up being a lot of calls to schedd.edit().   
>
> --
> Nick Peregonow
>
>
>
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-- 
Todd Tannenbaum <tannenba@xxxxxxxxxxx>  University of Wisconsin-Madison
Center for High Throughput Computing    Department of Computer Sciences
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