condor_ findhost searches a Condor pool of machines for the best machine or machines that will have the minimum impact on running Condor jobs if the machine or machines are taken out of the pool. The search may be limited to the machine or machines that match a set of constraints and rank expression.
condor_ findhost returns a fully-qualified domain name for each machine. The search is limited (constrained) to a specific set of machines using the -c option. The search can use the -r option for rank, the criterion used for selecting a machine or machines from the constrained list.
condor_ findhost is used to locate a machine within a pool that can be taken out of the pool with the least disturbance of the pool.
An administrator should set preemption requirements for the Condor pool. The expression
(Interactive =?= TRUE )will let condor_ findhost know that it can claim a machine even if Condor would not normally preempt a job running on that machine.
The exit status of condor_ findhost is zero on success. If not able to identify as many machines as requested, it returns one more than the number of machines identified. For example, if 8 machines are requested, and condor_ findhost only locates 6, the exit status will be 7. If not able to locate any machines, or an error is encountered, condor_ findhost will return the value 1.
condor_findhost -n 4 -r "mips"To find and list 24 machines, considering only those where the kflops attribute is not defined:
condor_findhost -n 24 -c "kflops=?=undefined"
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See the Condor Version 6.8.3 Manual for additional notices.