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   Re: [xml-dev] Scatter/gather pattern [was: New XPipe PresentationAvailab

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[Roger L. Costello]

> Sean, you have several slides in your XPipe presentation on the
> scatter/gather pattern.  Very interesting!  I would like to understand
> this better, as I can see many benefits from having an intimate
> knowledge of this pattern.

What is probably the best known application of a scatter-gather pattern
occurs, not in markup, not in software engineering, but in physics (or
electrical engineering depending on how you look at things).  I'm referring
to the famous Fast Fourier Transform.  The FFT lets you analyze the
frequency content of a waveform in time O[n log n) instead of O[n^2], which
a straightforward approach (the Discrete Fourier Transform) needs, where n
is the number of points in the waveform.

The art is in decomposing the problem and putting it back together, and I'm
sure that remains a constant over the span of scatter-gather solutions.

Conversely, scatter-gather won't be worth the effort unless it yields
similar savings.


Tom P


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