1just-man-pages/condor_findhosGte(n1e)ral Commands Mjaunsuta-lman-pages/condor_findhost(1)
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Name

6       condor_findhost find machine(s) in the pool that can be used with mini‐
7       mal impact on currently running Condor jobs and best meet any specified
8       constraints
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Synopsis

11       condor_findhost [ -help ] [ -m ] [ -n num ] [ -c c_expr ] [ -r r_expr ]
12       [ -p centralmanagerhostname ]
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Description

15       condor_findhost searches a Condor pool of machines for the best machine
16       or machines that will have the minimum impact on running Condor jobs if
17       the machine or machines are taken out of the pool. The  search  may  be
18       limited  to the machine or machines that match a set of constraints and
19       rank expression.
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21       condor_findhost returns a fully-qualified domain name for each machine.
22       The search is limited (constrained) to a specific set of machines using
23       the -c option. The search can use the -r option for rank, the criterion
24       used for selecting a machine or machines from the constrained list.
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Options

27       -help
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29          Display usage information and exit
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33       -m
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35          Only  search for entire machines. Slots within an entire machine are
36          not considered.
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40       -n num
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42          Find and list up to num machines  that  fulfill  the  specification.
43          num is an integer greater than zero.
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47       -c c_expr
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49          Constrain  the search to only consider machines that result from the
50          evaluation of c_expr .  c_expr is a ClassAd expression.
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54       -r r_expr
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56          r_expr is the rank expression  evaluated  to  use  as  a  basis  for
57          machine selection.  r_expr is a ClassAd expression.
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61       -p centralmanagerhostname
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63          Specify the pool to be searched by giving the central manager's host
64          name. Without this option, the current pool is searched.
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General Remarks

69       condor_findhost is used to locate a machine within a pool that  can  be
70       taken out of the pool with the least disturbance of the pool.
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72       An  administrator  should  set  preemption  requirements for the Condor
73       pool. The expression
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75       (Interactive =?= TRUE )
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77       will let condor_findhost know that it can claim a machine even if  Con‐
78       dor would not normally preempt a job running on that machine.
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Exit Status

81       The  exit  status of condor_findhost is zero on success. If not able to
82       identify as many machines as requested, it returns one  more  than  the
83       number   of  machines  identified.  For  example,  if  8  machines  are
84       requested, and condor_findhost only locates 6, the exit status will  be
85       7. If not able to locate any machines, or an error is encountered, con‐
86       dor_findhost will return the value 1.
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Examples

89       To find and list four machines, preferring those with the highest  mips
90       (on Drystone benchmark) rating:
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92       condor_findhost -n 4 -r "mips"
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94       To  find  and list 24 machines, considering only those where the kflop‐
95       sattribute is not defined:
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97       condor_findhost -n 24 -c "kflops=?=undefined"
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Author

100       Condor Team, University of Wisconsin-Madison
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103       Copyright (C) 1990-2009 Condor Team, Computer Sciences Department, Uni‐
104       versity   of  Wisconsin-Madison,  Madison,  WI.  All  Rights  Reserved.
105       Licensed under the Apache License, Version 2.0.
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107       See  the  Condor  Version   7.4.2   Manual   or   http://www.condorpro‐
108       ject.org/licensefor additional notices.
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110       condor-admin@cs.wisc.edu
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