[GE users] Schedule one job at a time

heman jimmy.hedman at southpole.se
Sun Jan 31 21:02:05 GMT 2010


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> Hi,
> 
> Am 29.01.2010 um 10:27 schrieb heman:
> 
> > We have some problems with a cluster of 200 nodes and many jobs  
> > waiting
> > in queue. Since we have pretty much nodes free many jobs are scheduled
> > and started at the same time which gives us problems with some other
> > resources.
> > Can this be changed so only one job is started each schedule interval?
> > Or perhaps depending on which queue get selected, so that for example
> > queue A starts as many jobs as possible but queue B only starts one  
> > job
> > at a time.
> 
> you could use a co-scheduler in a cron-job. If you submit all your  
> jobs to this special queue with -h to put them on hold (if necessary  
> by a JSV), they first need to be released. The co-scheduler would  
> then have the task to check whether there is exactly one job for this  
> queue no longer on hold, and otherwise to release exactly one job.
But how would the co-sheduler know which one to release? Feels like I need to write a real scheduler to figure out that, or?

// Jimmy
> 
> -- Reuti
> 
> 
> > Regards,
> > Jimmy Hedman
> >
> > -- 
> > Jimmy Hedman                      South Pole AB
> > Senior Linux Systems Specialist   Anderstorsvägen 16
> > Phone:  +46 8 56237100            SE-17154 Solna
> > Mobile: +46 70 7645172            http://www.southpole.se
> >
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