[GE users] How do execution hosts look for jobs?

templedf dan.templeton at sun.com
Tue Aug 11 20:39:17 BST 2009

Yep. The current recommendation is that in most clusters, you should set 
flush_finish_sec and flush_submit_sec to 1 in the scheduler 
configuration (qconf -msconf). That causes the master to schedule jobs 
immediately any time something new comes in or a slot opens up. You 
might also want to consider slightly oversubscribing your hosts (e.g. 5 
slots on a 4-core machine), especially if your jobs are short, which I 
assume they are.


craffi wrote:
> Look into "scheduling on demand" in the SGE docs, basically with these  
> settings enabled you'll trigger a scheduling interval each time a job  
> enters the system or a job exits from an exechost.
> -chris
> On Aug 11, 2009, at 3:22 PM, garyrichardson wrote:
>> Hi,
>> I'm curious as to how execution hosts get jobs? Do they poll the  
>> qmaster? Does the qmaster push to them? Is there a way to change how  
>> frequently they check in?
>> I'm trying to minimize the amount of time a host doesn't have work..  
>> In particular, I have a small grid with a short queue -- when a new  
>> job pops up I want an execution host to grab it as soon as possible.
>> Thanks.
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