[Beowulf] first cluster

Hearns, John john.hearns at mclaren.com
Fri Jul 16 02:02:53 PDT 2010

> Is it possible to know how much over-committed my OS was, say in the
> last one day. Or at least instantaneously. I want to see how good or
> bad my user apps have been at requesting memory. Thus, if I were to
> take the strict approach of memory assignment I can know in advance if
> or not a lot of malloc calls are going to get a zero returned.
I'm a bit busy this morning - Tube line was down, then my Bnew Brompton
had a mechanical.

Performance Copilot will give you very detailed plots of various types
of memory use


Also worth looking at your Ganglia plots - probably easier to install.

As an aside, my two pence worth on this thread.
To the original poster - you have done your research on what is needed
for a first cluster.
Take may advice, and that of a lot of people on this list, and contact a
cluster vendor in your area.
You will be surprised at how competitive the price is versus sourcing
the parts yourself.
And remember - people who build clusters are specialists in that task,
you are a specialist in oceanography.
Get on with doing your science, and let the cluster people get on with
building you a brilliant cluster and looking after it.

John Hearns
McLaren Racing

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