On Nov 29, 2007 1:14 PM, amjad ali <[EMAIL PROTECTED]> wrote: > Hello all, > > I want to develop and run my parallel code (MPI based) on a Beowulf > cluster. I have no problem as such that many user might log on to the > cluster simultaneously. Suppose that I am free to use cluster dedicatedly > for my single parallel application. > > 1) Do I really need a cluster scheduler installed on the cluster? Should I > use scheduler? >
Yes, it makes things easier to control and keep track of. > > 2) Is there any effect/benefit on the running of a parallel code with or > without cluster job scheduler? > It depends how many jobs/nodes you run on a 4 node system you would be fine running something like torque with pbs_sched. If your requirements become higher I'd recommend Maui and for those complex environments with many cores/nodes I'd recommend Moab. The benefit is ease of use, the more jobs you run the harder it is to manage those jobs. > > 3) How you differentiate between cluster scheduler and cluster resource > manager? > One schedules the other gives back information about what resources are available. > > 4) If there is any significant difference between a scheduler and manager > then plaese tell me that which of the fall in which category: > > OpenPBS, PBS Professional, SGE, Maui, Moab, Torque, Scyld, LSF, SLURM etc. > Torque=Resource Manager (RM) w/basic scheduling PBS=(RM) w/some scheduling functionality SGE=(RM) w/some scheduling functionality Maui=Scheduler Moab=Scheduler + More OpenPBS=Use Torque LSF=(RM) w/some scheduling functionality SLURM=(RM) w/basic scheduling A resource manager manages resources where as a scheduler can schedule these resources. Although something like torque resource manager (OpenPBS) has pbs _sched a fifo scheduler it is still in-adequate in most environments and you would need a scheduler such as Maui or Moab to schedule it. > > 5) What is maent by " PBS/SGE/LSF supports integration with the Maui > scheduler? > You have this mixed up with Moab, Moab can talk to all of these resource managers and give you a single point of job submission/administration over all resource managers. Cluster Resources provide free support to eval Moab which can be quite handy http://www.clusterresources.com/pages/products/evaluate.php > > Precise, easy and brief reply requested. Thanks to all. > > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > > -- ------------------------------ Christopher Vaughan
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