1) Do I really need a cluster scheduler installed on the cluster? Should I
use scheduler?
even for a dedicated cluster, there is some appeal of a queueing system,
since it lets you run concurrent jobs more easily, and to queue a set of
jobs which wait until resources are available.
2) Is there any effect/benefit on the running of a parallel code with or
without cluster job scheduler?
no, unless the scheduler (or monitoring tools) are inefficient.
3) How you differentiate between cluster scheduler and cluster resource
manager?
theoretically it would be possible to create a pure cluster-controller
(resource manager: starts, suspends, stops jobs; maintains node status)
separated entirely from any mechanism to choose which job to run, where, when
(scheduler). I'm not convinced there would be any real point to this.
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.
I think of scyld as more of a cluster platform/infrastructure -
I don't know whether it actually provides a queueing system.
all forms of PBS/SGE/LSF are functionally equivalent; slurm is
perhaps a little more stripped down - closer to a res manager.
5) What is maent by " PBS/SGE/LSF supports integration with the Maui
scheduler?
it means that the people responsible for product X have added enough
goop to attach Maui to their system. PBS/SGE/LSF are all large systems
which contain their own schedulers, but if you want even more complexity,
you can glue on another ;)
Precise, easy and brief reply requested.
IMO, it's bad taste to be picky when asking for help.
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