On 20 Dec 2010, at 15:41, Jonathan Hartley wrote:
> clients with extremely large spreadsheets (which take hours to recalculate on
> Excel)
*shudder*
But that is what makes what you have done even more amazing :) I'm pretty sure
spreadsheets of that level of complexity have a lot of subtle excel'isms that
you must support and at least be able to do on your system.
> to manually partition calculations to run in parallel across several EC2
> instances. Soon we hope to make this process automatic, by examining the
> dependency graph (which cells depend on which other cells) and passing large
> stand-alone chunks of the graph to be recalculated on other machines.
>
> A lot of our core code, such as formula parsing and dependency calculation,
> didn't use any .Net at all, and so getting Dirigible running under CPython
> using code from Resolver One was straightforward. Nevertheless, personally
> I'd never done any Django nor Javascript, nor EC2 before, and the other guys
> on the team weren't massively experienced in these things either, so there
> was a concern about how quickly we could make progress. Happily, we managed
> to go from first conception ('mkdir Dirigible') to first beta release of
> Dirigible in two and a half months, and have been releasing updates every
> couple of days since, which is something I'm very proud of.
>
> Going forward, we hope that the two products will compliment each other (web
> apps aren't the right solution for everyone), and that code-sharing between
> the projects will mean that improvements in one (e.g. in providing robust
> statistical functions, or more Excel-compatible functions) will also improve
> the other.
That is all really really cool :)
-Matt
--
Matt Hamilton ma...@netsight.co.uk
Netsight Internet Solutions, Ltd. Business Vision on the Internet
http://www.netsight.co.uk +44 (0)117 9090901
Web Design | Zope/Plone Development and Consulting | Co-location | Hosting
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