The author(s) are from Microsoft .. they claimed to reverse engineer internals. My understanding is that MapReduce internals **is** a Google closely held secret ... hence the open source version is "dumbed down" .. I have forgotten the name.<br>
<br>Vasili<br><br><div class="gmail_quote">On Wed, Feb 25, 2009 at 8:49 AM, Eugene Kirpichov <span dir="ltr"><<a href="mailto:ekirpichov@gmail.com">ekirpichov@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I've read this article too, and I must say that it is indeed a very<br>
interesting and exciting read, both in terms of understanding<br>
MapReduce and its capabilities somewhat better, and in terms of<br>
beholding the beauty of Haskell.<br>
<br>
It is not exactly reverse engineering, but it is expressing the<br>
essense of MapReduce algorithms, prerequisites, axioms, dimensions of<br>
its design space etc. in Haskell.<br>
<br>
2009/2/25 Thomas DuBuisson <<a href="mailto:thomas.dubuisson@gmail.com">thomas.dubuisson@gmail.com</a>>:<br>
<div><div></div><div class="Wj3C7c">> Vasili,<br>
> What do you mean? Googles MapReduce is already a published / well<br>
> understood concept so no reverse engineering is needed. If you are<br>
> asking about pre-existing implementations, there is at least one [1]<br>
> but only for reference, not speed. If you are asking about community<br>
> interest, great and you might want to say something on the haskell<br>
> proposals reddit [2].<br>
><br>
> [1] <a href="http://www.cs.vu.nl/%7Eralf/MapReduce/" target="_blank">http://www.cs.vu.nl/~ralf/MapReduce/</a><br>
> [2] <a href="http://www.reddit.com/r/haskell_proposals" target="_blank">http://www.reddit.com/r/haskell_proposals</a><br>
><br>
> 2009/2/24 Galchin, Vasili <<a href="mailto:vigalchin@gmail.com">vigalchin@gmail.com</a>>:<br>
>> Hello,<br>
>><br>
>> Here is an interesting paper of Google's MapReduce reverse engineered<br>
>> into Haskell. I apologize if already posted .....<br>
>> <a href="http://www.cs.vu.nl/%7Eralf/MapReduce/" target="_blank">http://www.cs.vu.nl/~ralf/MapReduce/</a><br>
>><br>
>> Kind regards, Vasili<br>
>><br>
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<br>
<br>
<br>
</div></div><font color="#888888">--<br>
Eugene Kirpichov<br>
Web IR developer, <a href="http://market.yandex.ru" target="_blank">market.yandex.ru</a><br>
</font></blockquote></div><br>