The available slurm documentation can be found here: http://slurm.schedmd.com
*/David* On Thu, Apr 25, 2013 at 11:41 AM, David Bigagli <[email protected]> wrote: > Hi, slurm.conf has the following parameter as documented in the > slurm.conf man page: > > max_job_bf=# > The maximum number of jobs to attempt backfill > scheduling for (i.e. the queue depth). Higher values > result in more overhead and less responsiveness. > Until an attempt is made to backfill schedule a job, > its expected initiation time value will not be set. > The default value is 50. In the case of large clus- > ters (more than 1000 nodes) configured with > SelectType=select/cons_res, configuring a relatively small > value may be desirable. This option applies only to > SchedulerType=sched/backfill. > > This should do it. > > > */David* > > > On Wed, Apr 24, 2013 at 11:32 PM, Tapasya Patki > <[email protected]>wrote: > >> Thanks Carles, that's what we did, but I was just wondering if there was >> a separate plugin that already existed. >> >> Thanks again. >> >> --T >> >> >> On Wed, Apr 24, 2013 at 11:10 PM, Carles Fenoy <[email protected]> wrote: >> >>> Hi Tapasya, >>> >>> I don't know of any implementation of easy backfilling for slurm, but it >>> should be very easy to modify current backfill plugin to implement easy >>> backfilling. >>> The reservation is made at the end of the backfill algorithm so just >>> wrapping it with an "if" for the first job should be enough. You should add >>> a counter to know if its the first job, but it should be pretty easy. >>> >>> These are the lines involved in the reservation (lines 917,918 in >>> src/plugins/sched/backfill/backfill.c) >>> >>> bit_not(avail_bitmap); >>> _add_reservation(job_ptr->start_time, >>> end_reserve, >>> avail_bitmap, node_space, >>> &node_space_recs); >>> >>> >>> Regards, >>> Carles Fenoy >>> >>> >>> On Thu, Apr 25, 2013 at 7:40 AM, Tapasya Patki >>> <[email protected]>wrote: >>> >>>> Hello, >>>> >>>> Is there an existing simple backfilling plugin for SLURM that does easy >>>> backfilling (only make a reservation for the first job at the head of the >>>> queue)? The sched/backfill seems to work in a conservative way (correct me >>>> if I'm wrong). >>>> >>>> Thanks. >>>> >>>> --Tapasya >>>> >>> >>> >>> >>> -- >>> -- >>> Carles Fenoy >>> >> >> >
