Hello, (Inline reply.)
On Fri, Apr 1, 2011 at 8:35 PM, ranjith k <[email protected]> wrote: > hello. > I am new to hadoop map reduce programming. I need to write a map reduce > program. I have a input folder, it contain a 10 number of documents in text > format. My aim is to write a map reduce program that read each text file and > create the word count of each text file separately. My input split is each > line. The map function is called for each line of text. But i need my file > name in map function. How can i get the file name to my map function. This is covered in the docs as part of the Map/Reduce Tutorial itself. Have a look at the table right below this para-link: http://hadoop.apache.org/common/docs/r0.20.0/mapred_tutorial.html#Task+JVM+Reuse > Similarly i need to write the output of each file separately, is it > possible? You can achieve some levels of output file-naming using the MultipleOutputs class. > My hadoop version is Hadoop 0.20.2. -- Harsh J http://harshj.com
