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Re: utterly confused by Lightweight Grid

• To: mathgroup at smc.vnet.net
• Subject: [mg97933] Re: utterly confused by Lightweight Grid
• From: Jon McLoone <jonm at wolfram.co.uk>
• Date: Thu, 26 Mar 2009 05:20:00 -0500 (EST)
• References: <gq2esk$ean$1@smc.vnet.net> <gqacq3$jaj$1@smc.vnet.net>

On Mar 25, 10:45 am, Vince <blues... at gmail.com> wrote:

> Licenses aside, three related questions:
>
> 1. Does Wolfram Lightweight Grid contain a copy of Mathematica 7.0.1?

Yes. It includes the binaries of Mathematica 7.0.1.

> 2. If so, is that the media it uses to provide a "computation" kernel?

By default, yes. But there is a way to configure it launch from
another path, which might, for example be your 7.0.0 install.

> 3. If so, can this be incompatible with a master kernel and/or other
> computation kernels at version 7.0.0?

I don't beleive that there should be any problems. Except, of course,
if you distribute a problem where there was a fix/change in 7.0.1, the
result that you got might be somewhat non-deterministic depending on
which kernel performed the calculation.

For example
ParallelEvaluate[$ReleaseNumber]
Would give a somewhat unpredicable list of 0s and 1s if you had a
mixed grid of 7.0.1 and 7.0.0 binaries.

In general, I would recommend upgrading all of your installs to 7.0.1
anyway.

Jon