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[HTCondor-users] How can I influence the match-making using customized factors?

I have a cluster of 32 nodes connected by gigabit ethernet, each one has one 8 cores i7 CPU and two Tesla C2050 GPU card. My jobs are in 3 types:
a. IO intensive
b. CPU intensive
c. GPU intensive
Most of them have hundreds of input files and can be done in one day, except GPU jobs may be take two or three days.
I think if I can combine these jobs according their types to execute in one machine, it would be more efficient. For example, if a job is CPU intensive(only one thread), it would be better to dispatch it to a machine with most IO intensive and GPU intensive jobs.
I can assign 3 float values to each job to stand for IO, CPU and GPU intensity, and use Condor to keep balance in cluster nodes. Is this idea meaningful? If so, can Condor do this?
Kyle Qian