One problem I'm seeing with this approach is that if I want to allow
users to select processors per node, the number of pes that will need to
be defined is quite large.
I was thinking that I could create a complex of type STRING, say
"fabric" where we have values "a" or "b" defined as a complex value for
each host. Then, have a STRING, say "switch", with some value "a", "b",
... etc.
This would allow us to select:
hard request: fabric=*
soft request: switch=*
When you use a wildcard with a PE name, only ONE PE is selected for the
job. In the case of the wildcard selected string, would only a single
string instance be selected or would any matching string be picked?
If only a single instance per job, say
fabric=a
switch=b
gets picked, then I could set
-hard -l fabric=* -soft -l switch=*
in the sge_request file to pull off the desired behavior, and keep only
a small set of PEs available.
-Brian
Brian Smith
Sr. System Administrator
Research Computing, University of South Florida
4202 E. Fowler Ave. SVC4010
Office Phone: +1 813 974-1467
Organization URL: http://rc.usf.edu
On 07/11/2012 04:28 PM, Reuti wrote:
Am 11.07.2012 um 22:13 schrieb Brian Smith:
Hi, all,
Is the following formatting permitted for the pe_list attribute in a queue
configuration:
...
pe_list [@hgrp1=pe_sw1],[@hgrp2=pe_sw2],[@hgrp3=pe_sw3],[@allHosts=pe_all]
...
or, perhaps
...
pe_list [@hgrp1=pe_sw1 pe_all],[@hgrp2=pe_sw2 pe_all],[@hgrp3=pe_sw3 pe_all]
...
Besides the missing default value (which could even be "none") both are valid. But there
is no order in which the PEs are selected. I would suggest to leave the "pe_all" out of
the game (or name it different to address it directly).
-- Reuti
Consider that @hgrp1 is on IB switch 1, @hgrp2 is on IB switch 2, and @hgrp3 is
on IB switch 3; that @allHosts = @hgrp1,@hgrp2,@hgrp3; that switches 1-3 are
connected to a 4th switch.
Then, we do something fun like
-pe pe* <#slots>
to get a poor man's best-effort IB topology scheduling. Would it work?
-Brian
Brian Smith
Sr. System Administrator
Research Computing, University of South Florida
4202 E. Fowler Ave. SVC4010
Office Phone: +1 813 974-1467
Organization URL: http://rc.usf.edu
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