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Re: [Condor-users] Order of selection of machines in condor pool
- Date: Wed, 12 Oct 2005 18:37:03 +0200
- From: "Thomas Bauer" <tombauer@xxxxxxxxxxxxxxxxxxx>
- Subject: Re: [Condor-users] Order of selection of machines in condor pool
> I recently added 40 fast nodes to my pool of what had been
> just 14 slow nodes. The 40 fast nodes seem to be working OK.
> However, when the pool is mostly idle, it seems like it is
> very often the slow nodes that match first. for example,
> there are 16 jobs running at the moment and all but one of
> them have matched on the slow nodes that were in the pool at first.
> So what is the scheduling algorithm that is being used? As
> far as I know any node in the pool would meet the requirements of
> these jobs equally well. I verified by submitting 100 jobs that
> all the nodes are in fact able to accept and run jobs. It's
> obviously not a round-robin scheduler. What would make the bias?
I don't know the exact algorithm of scheduling, but if you put "rank = mips"
into your submission-file the fastest (most Mips) of your available machines
will be used for the jobs.