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Subject: Global information in mapreduce
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Date: Mon, 19 Mar 2007 12:40:51 +0300
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Message-ID: <410ACBBB22A25A4CAE7D1ABC316125D00EE362@caesar.elegion.local>
Thread-Topic: Global information in mapreduce
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From: "Ilya Vishnevsky" <Ilya.Vishnevsky@e-legion.com>
To: <hadoop-dev@lucene.apache.org>

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Hello! My question is about mapreduce. Is it possible to pass to the map
function some global information? For example I have a set of words and
a large set of documents. I want the map function to get each document
as value and emit pairs (word-frequency) for each word in the set, where
"frequency" is frequency of this word in the document. To do this I need
map function to have access to the set of words each time it runs. Is it
possible to do that?


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