I am starting to study map-reduce databases. How can one implement a reference in a map-reduce database, such as CouchDB or MongoDB? For example, suppose that I have drivers and cars, and I want to ma
I have a large set of text files in an S3 directory.For each text file, I want to apply a function (an executable loaded through bootstrapping) and then write the results to another text file with the
Lets say I have two types of documents stored in my CouchDB database. First is with property type set to contact and second to phone. Contact type document have another property called name. Phone typ
Can someone explain me how the text searching algorithm works? I understand its a huge field but am trying to understand it from high level so that I can look up academic papers on it.
I\'m trying to implement the Page开发者_运维百科Rank algorithm on Hadoop platform with Eclipse, but I\'m facing some unusual problems :). I tried this locally: installed cygwin, set up Hadoop 0.19.2 (
In Hadoop you can use the secondary-sort mechanism to sort the values before they are sent to the reducer.
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I am adding a file to distributed cache of Hadoop using Configuration cng=new Configuration(); JobConf conf = new JobConf(cng, Driver.class);
I want to get the id of each mapper and reducer task because I want to tag the output of these mappers and reducers according to the mapper and reducer id. How can I retrieve the ids of each?
I\'ve been writing tic-tac-toe in a variety of languages as an exercise, and one pattern that has emerged is that every representation I\'ve come up with for the defining valid winning rows has been d
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