| Re: MacOSX: Xgrid+IDL Anyone? [message #37580] |
Thu, 08 January 2004 19:45  |
Paul Woodford
Messages: 43
Registered: June 2000
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Member |
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In article <20040108140819354-0700@news.colorado.edu>,
Steven V. Penton <spenton@colorado.edu> wrote:
> Ok, so Xgrid on MacOSX is cool, but it doesn't seem to
> work with IDL. I've tried all the thread tweaks but I
> couldn't get a serious Poly_2d call to work.
I've not used it, but based on the discussion on Apple's sci-tech
mailing list, Xgrid is really for running multiple programs, not
multiple threads from one program. In other words, if you have a bunch
of independent IDL runs, Xgrid will distribute them over the machines
that you have.
Paul
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| Re: MacOSX: Xgrid+IDL Anyone? [message #37661 is a reply to message #37580] |
Sun, 11 January 2004 18:21  |
Steven V. Penton
Messages: 5
Registered: February 2003
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Junior Member |
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Ok, so I guess I was naive in hoping that the threads would
be distributed via Xgrid. I"ve been sending idl tasks that
benefit from parallel processing to multiple machines with
tcsh+ssh for years, I was just hoping Xgrid could steroid my
wimpy processor, I guess not. Anyway, here is the friendly
response I received from Apple. Steve
Steven,
Thanks for the feedback. Xgrid does not distribute each thread to a
different machine. The idea behind Xgrid is that you can run multiple
instances of your application, and each instance should have a different
set of arguments. I believe that you could get Xgrid to use more
machines with your IDL application if you use a file list argument with
more than one file -- each machine will get a different file. However,
this may require restructuring your IDL application so that each file
causes the idl executable to load a different set of data, and process
it in a single thread. If you need to be able to communicate between
each of the threads, then Xgrid may not be suitable for your particular
situation.
Please let me know if you have any further questions.
Thanks,
The Xgrid Team
In <cpwoodford-9A405D.22450908012004@corp.supernews.com> Paul Woodford
wrote:
> In article <20040108140819354-0700@news.colorado.edu>,
> Steven V. Penton <spenton@colorado.edu> wrote:
>
>> Ok, so Xgrid on MacOSX is cool, but it doesn't seem to
>> work with IDL. I've tried all the thread tweaks but I
>> couldn't get a serious Poly_2d call to work.
>
> I've not used it, but based on the discussion on Apple's sci-tech
> mailing list, Xgrid is really for running multiple programs, not
> multiple threads from one program. In other words, if you have a
> bunch of independent IDL runs, Xgrid will distribute them over the
> machines that you have.
>
> Paul
>
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