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Re: utterly confused by Lightweight Grid

  • To: mathgroup at
  • Subject: [mg97869] Re: utterly confused by Lightweight Grid
  • From: jonm at
  • Date: Tue, 24 Mar 2009 05:31:48 -0500 (EST)
  • References: <gq2esk$ean$>

On Mar 21, 10:17 am, "Sjoerd C. de Vries" <sjoerd.c.devr... at>
> Hi all,
> I read the announcement about the new gridMathematica stuff. As a
> premier licensee I got to download the Lightweight Grid Manager for
> free.  Cool! The documentation and the announcement were a bit
> confusing as to what precisely I could do with it, but it seemed that
> I would be able to run parallel calculations on my computers running
> v7. So, I downloaded a PC and mac version of the Lightweight Grid
> Manager and installed it on a mac and two PCs. One PC and the mac are
> laptops which connect by WLAN, the other PC is wired into the LAN.
> Using the web browser interface I could interact with all three
> machines. So, networking seemed to be OK. The PCs can share files and
> ping ok. Lightweight Grid is enabled. In Mathematica's Parallel kernel
> configuration I can see two of the three servers, one PC and one mac.
> The other PC remains hidden even after switching off all firewalls.
> And again, the web interface runs fine, therefore I don't think that
> was a factor after all.
> I did not suceeded in launching any remote kernel. ParallelEvaluate
> [$MachineName] returns {}.
> Anyone else done some testing? Is my interpretation of Lightweight
> Grid Manager's functionality mistaken and do I need some additional
> stuff like the Grid server?
> Cheers -- Sjoerd

Wolfram Lightweight Grid provides a mechanism for broadcasting the
availability of a computer, and managing remote launching and
connection of available Mathematica Kernels. But it does not, itself,
include any additional Mathematica licenses.

If you have a network license of Mathematica available to you,
configure those Wolfram Lightweight Grid installations to request
licenses from your existing MathLM server.

If you do not have any available Mathematica licenses to run on those
machines, you will need to purchase some. Either a regular Mathematica
network license, or gridMathematica Server, depending on whether you
want them to also work standalone or just want them for parallel

Jon McLoone

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