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Just in case people are interested, we could also try playing with
this setting. We might want to try P+ATCL. We are currently using
P+FIFO:<br>
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<pre class="literal-block">#
# Job Sorting Schemes for Blade Assignment
#
# "P+FIFO" -- this is the default scheme for assigning available
# blades to jobs, it always picks the job with the highest priority
# value, and if there are several jobs with the same priority then
# it selects the one that was spooled first.
#
# "P+RR" -- this mode schedules jobs of the same priority using a
# simple "Round-Robin" approach: jobs in the same priority block
# are visited in a circular fashion as blades become available.
# This mode can allow several jobs with many ready tasks to
# progress simultaneously, favoring jobs with long-running tasks,
# although it is not as predictable as the strict "P+FIFO" mode.
#
# "P+ATCL" -- Active Task Count Leveling, this mode also first
# sorts jobs by strict priority, then within a group of jobs with
# the same priority it prefers to assign available blades to jobs
# with the fewest active tasks. This mode tends to allocate roughly
# the same number of blades to each job, while favoring older jobs
# over newly spooled ones. Given roughly equal numbers of blades,
# jobs with short-running tasks will finish sooner than jobs with
# long-running tasks, under this scheme.
#
# NOTE: Any scheduling mode other than P+FIFO will incur
# extra computational expense during blade assignment, and
# will therefore decrease system throughput by some amount.
# The magnitude of the observed effect will vary depending
# on overall job load, farm size, task mix, and engine host.
#
"JobSchedulingMode": "P+FIFO",</pre>
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<pre class="moz-signature" cols="72">--
Wm. Josiah Erikson
Assistant Director of IT, Infrastructure Group
System Administrator, School of CS
Hampshire College
Amherst, MA 01002
(413) 559-6091
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