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just-man-pages/condor_findhoGeneral Commands just-man-pages/condor_findhost(1)

Name
       condor_findhost find machine(s) in the pool that	can be used with mini-
       mal impact on currently running HTCondor	jobs and best meet any	speci-
       fied constraints

Synopsis
       condor_findhost [ -help ] [ -m ]	[ -n num ] [ -c	c_expr ] [ -r r_expr ]
       [ -p centralmanagerhostname ]

Description
       condor_findhost searches	an HTCondor pool of machines for the best  ma-
       chine or	machines that will have	the minimum impact on running HTCondor
       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 con-
       straints	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.

Options
       -help

	  Display usage	information and	exit

       -m

	  Only	search for entire machines. Slots within an entire machine are
	  not considered.

       -n num

	  Find and list	up to num machines  that  fulfill  the	specification.
	  num is an integer greater than zero.

       -c c_expr

	  Constrain  the search	to only	consider machines that result from the
	  evaluation of	c_expr .  c_expr is a ClassAd expression.

       -r r_expr

	  r_expr is the	rank expression	evaluated to use as a  basis  for  ma-
	  chine	selection.  r_expr is a	ClassAd	expression.

       -p centralmanagerhostname

	  Specify the pool to be searched by giving the	central	manager's host
	  name.	Without	this option, the current pool is searched.

General	Remarks
       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 HTCondor
       pool. The expression

       (Interactive =?=	TRUE )

       will let	condor_findhost	know that it can claim a machine even  if  HT-
       Condor would not	normally preempt a job running on that machine.

Exit Status
       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 re-
       quested,	and condor_findhost only locates 6, the	exit status will be 7.
       If  not	able  to locate	any machines, or an error is encountered, con-
       dor_findhost will return	the value 1.

Examples
       To find and list	four machines, preferring those	with the highest  mips
       (on Drystone benchmark) rating:

       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"

Author
       Center for High Throughput Computing, University	of Wisconsin-Madison

Copyright
       Copyright (C) 1990-2015 Center for High Throughput Computing,  Computer
       Sciences	 Department, University	of Wisconsin-Madison, Madison, WI. All
       Rights Reserved.	Licensed under the Apache License, Version 2.0.

				     date    just-man-pages/condor_findhost(1)

Name | Synopsis | Description | Options | General Remarks | Exit Status | Examples | Author | Copyright

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