What sorting algorithm does mapreduce use in Hadoop? Can I change it?

Asked Jul 17 '15 at 06:41

Active Jul 17 '15 at 08:04

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At first I parsed my .jar file containing the program of WordCount along with input and output destination in the command line. After the completion of my job, I saw the content of my output file: it was sorted automatically alphabetically or sorted by numbers in ascending order. Is there any way to change it internally in hadoop? Which algorithm does it use to sort?

edited Jul 17 '15 at 08:04

Hans1984

asked Jul 17 '15 at 06:41

Udit Solanki

TeraSort algorithm. Reference:http://sortbenchmark.org/YahooHadoop.pdf – Rohit Jul 17 '15 at 07:19
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see http://stackoverflow.com/questions/5779750/mapreduce-shuffle-sort-method – Andrea Iacono Jul 17 '15 at 08:54

What sorting algorithm does mapreduce use in Hadoop? Can I change it?

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