On Thu, Mar 09, 2017 at 02:24:38PM +0100, Roberto Nunnari wrote:
> Hi Reuti.
> Hi William.
> 
> here's my settings you required:
> params                            MONITOR=1
> max_reservation                   32
> default_duration                  0:10:0
> 
> I cannot understand how What I see in
> ${SGE_ROOT}/${SGE_CELL}/common/schedule can help me.. here's a little
> extract for a job submitted with -R y, and it keeps repeating without change
> ...
> 3653372:1:RESERVING:1489043424:660:P:smp:slots:32.000000
> 3653372:1:RESERVING:1489043424:660:Q:long.q@node19.cluster:slots:32.000000
> 3653372:1:RESERVING:1489043424:660:P:smp:slots:32.000000
> 3653372:1:RESERVING:1489043424:660:Q:long.q@node19.cluster:slots:32.000000
> ...
> 
> Thank you for your help.
> Roberto
The 4th field is the date of the reservation in seconds since the unix epoch.

date -d@1489043424 

Will convert it to something readable (early yesterday morning).  The 5th field
(despite what the man page says) is the duration of the reservation.  You 
usually 
want to look at the information from the last scheduling run (scheduling runs 
are 
separated from each other by lines of consecurive colons).

That default_duration looks a little short.  The scheduler is assuming any 
running jobs
will terminate in under 10 minutes and as a result is probably trying to 
reserve 
resoorces that won't actually be free when the reservation comes due.  

To make reservations work you really need most jobs to have a hard time limit 
associated with them
and a long default_duration (as in Reuti's example) to encourage the scheduler 
not to schedule jobs
on resources currently occupied by jobs without such a limit.

> On 08.03.2017 18:48, Reuti wrote:
> >- do you request any expected runtime in the job submissions (-l h_rt=???)?
> >- is a sensible default set in `qconf -msconf` for the runtime 
> >(default_duration 8760:00:00)?
> >- is a sensible default set in `qconf -msconf` for the number of 
> >reservations (max_reservation 20)?

Bear in mind that, with your current config, only the 32 highest priority jobs 
in the queue that request
one will get a reservation.


William

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