RE: [BProc] Queueing & scheduling

[Chong C. <cc...@pl...>]

Hi,=20
        Just let you know. We have an LSF integration on bproc. It =
provides full LSF scheduler ability , including fairshare, =
preemption....=20

        Chong

-----Original Message-----
From: Gregory Shakhnarovich [mailto:gr...@ai...]
Sent: Wednesday, June 25, 2003 5:40 PM
To: bpr...@li...
Subject: [BProc] Queueing & scheduling



Hi,

We are working on our new BProc-based cluster. The initial setup has =
been
nice and smooth, but one major hole we still have is the =
scheduler/queuing
system (which is quite important for the intended use of the cluster).

I am aware of Clubmask, but as people here have pointed out, the need to
do full node install makes that solution very undesirable.  It looks =
like
the only (other) immediately available solution is BJS. So, I am trying =
to
figure out the following (and will appreciate any tips):

1) We have 32 dual-CPU nodes, and would like them to be treated as 64
nodes for scheduling purposes. How can this be conveyed to BJS?

2) How do we tell BJS not to include the head node in the pool? A =
related
question - what is the semantics of the indices in 'nodes' directive?

3) Has anyone implemented any policy modules in addition to 'simple' and
'shared', which could be shared with us?

4) Is there any way to introduce priorities with the existing policies?

What we want ideally is to have 2-3 priority levels (low/med/high) so =
that
the jobs get scheduled and suspended/restarted dynamically based on the
priority, in addition to node availability. I.e., if all the nodes are
taken by a job L with low priority, and a job H with high priority
arrives, then L is suspended until H is done.

(*ideally* there would be some anti-starvation mechanism as well, likely
upgrading L after it's been unfinished for a while, but for now we would
be happy without it.)

I will much appreciate any suggestions on how this could be accomplished
with Bproc.

Thanks,

--
Greg     Shakhnarovich
AI Lab, MIT  NE43-V611
Cambridge,  MA   02139
tel     (617) 253-8170
fax     (617) 258-6287









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