Re: [Condor-users] Dedicated Scheduling - Submit machine constraint

[Greg Thain <gthain@xxxxxxxxxxx>]

> All,
>
> I am trying to understand the motivation behind dedicated-scheduling jobs having to be submitted only from the "DedicatedScheduler" machine?
>
> So, What if, multiple machines submit these jobs?
> Can't they somehow allocate some "N" machines from Central Manager and proceed?
> Will this cause some kind of deadlock?
Deadlock is indeed the reason.  Something a bit subtle about the way the 
dedicated scheduler works is that it "holds onto" and accumulates 
machines it gets from the negotiator until it gets enough to run a whole 
parallel job.  This process may take several negotiation cycles.  The 
negotiator doesn't know about parallel jobs.  So, if more than one 
scheduler were doing this, there would be a good possibility for deadlock.

-greg