title: Where should I write mapreduce program
body: <p>Where should I write map-reduce programs - in text file or anything else ? </p>
  
  <p>What is the file format to save file containing Map-reduce program?</p>
  
  <p>e.g. </p>
  
  <p>In java, text file, having java code saved as filename.java but what will be that for map-reduce program?</p>
  
  <p>Please answer as I need it badly.</p>