[Beowulf] What services do you run on your cluster nodes?
landman at scalableinformatics.com
Tue Sep 23 04:50:17 PDT 2008
Robert G. Brown wrote:
> One can always run xmlsysd instead, which is a very lightweight
> on-demand information service. It costs you, basically, a socket, and
> you can poll the nodes to get their current runstate every five seconds,
> every thirty seconds, every minute, every five minutes. Pick a
> granularity that drops its impact on a running computation to a level
> you consider tolerable, while still providing you with node-level state
> information when you need it.
> Just a thought...;-)
I really have to look at this already. If the poll could be rigged so
that everyone gets polled at the same time, and it is not too frequent
(1/minute), this could be quite helpful. Especially if it doesn't have
to run a process/fork a thread to get state info. Ganglia is nice, but
it has some overhead. And occasionally gmond wanders off into a
different universe ...
If you have the pointer handy to the tool (save me a google, and get you
free advertising :) ) ...
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web : http://www.scalableinformatics.com
phone: +1 734 786 8423 x121
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