Re: [HTCondor-users] ep custom configuration

[Todd L Miller <tlmiller@xxxxxxxxxxx>]

> also the START expression won't affect any jobs that are _already 
> running_...

	If you do something like:

MY_BUSY_EXPRESSION = <my-busy-expression>
START = <my-normal-start-expression> && (! ($(MY_BUSY_EXPRESSION))

You can then do something like (test this first, seriously):

WANT_SUSPEND = FALSE
WANT_HOLD = FALSE
KILL = TRUE
PREEMPT = $(MY_BUSY_EXPRESSION)
MAXJOBRETIREMENTTIME = 0

to kill jobs immediately after the startd notices that the node is busy.


	If you use a startd cron to change the value MY_BUSY_EXPRESSION, 
you can use

STARTD_CRON_<jobname>_MODE = WaitForExit

to minimize the delay between the <jobname> cron noticing that the system 
is busy and the startd noticing that it's time to start kill all the jobs.


	I'm pretty sure there's a knob to control how often the startd 
evaluates PREEMPT, but I can't find it right now.

-- ToddM