Re: [Condor-users] Does negotiator sorting apply only to ties or to all jobs?

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

Ian Chesal wrote:
> They way it is written, it makes it sound like the entire list is 
> re-sorted if NEGOTIATOR_PRE_JOB_RANK doesn't yield a unique and that 
> it's re-sorted 2 times, maybe 3 times if preemption is to occur, before 
> another top match is looked for. That doesn't seem like it can be the 
> case. 
> It *must* be looking for a new top match between sorts otherwise 
> the only sort setting that matters after NEGOTIATOR_PRE_JOB_RANK would 
> be the last one evaluated (NEGOTIATOR_POST_JOB_RANK or PREEMPTION_RANK).

Don't think of it as the list be re-sorted over and over.  The list of 
machine ads is sorted just once lexicographically, and then the top 
machine ads is picked. Just like you may sort a list of names once w/ a 
primary key of last name and a secondary key of first name, the 
matchmaker sorts the list of machine ads once with the following 'keys' 
in order from most significant to least significant (for each, a larger 
number means 'better'):

	1. negotiator pre job rank
	2. job rank of offer
	3. negotiator post job rank
	4. preemption state (2=no preempt, 1=rank-preempt, 0=prio-preempt)
	5. preemption rank (if preempting)

Hope this helps.

regards,
Todd