Job_sort_formula examples

Users/Site Administrators
1

Hi all,

I am looking to use the job sort formula to set the job execution priority based on the following:

queue priority
fairshare_factor
give multi core jobs higher priority over single core jobs.

The issue I am facing is how to create the formula. I have taken a look at the documentation and I am a bit confused on how to go about creating it. So far it looks like this

job_sort_formula=‘queue_priority + fairshare_factor + ncpus’

I’m not sure if that will cover all my bases. Are there any folks that use the job sort formula and wouldn’t mind sharing an example?

Thanks for the help

2 
set server job_sort_formula = "base_score + score_boost + (enable_wfp * wfp_factor * (eligible_time ** 2 / min(max(walltime,21600.0),43200.0) ** 3  * project_priority * nodect / total_cpus)) + (enable_backfill * min(backfill_max, eligible_time / backfill_factor)) + (enable_fifo * eligible_time / fifo_factor)"

The above is what we use. It unfortunately has to be all one line. The things with enable_ in them can be set to 0 to remove that term from the formula when appropriate.

I hope that helps.

Bill

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3

You may also want to think about the magnitude of the various terms. For instance if queue priority is 150, we don’t use fairshare, but I believe that is a number between 0 and 1 and ncpus could be 4-256?. Perhaps multiply by the fairshare factor? You could also normalize all your terms by dividing by the max value so they are all between 0 and 1. It also depends on if you want one to have more weight than another. Just things to think about.

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