title: Adding output files to an existing output directory in Mapreduce
body: <p>I want to add output files of a map reduce program to the same directory every time I run the job by appending time stamp at the end of file name.</p>
  
  <p>Currently i am able append the time stamp at the end of file output file, but I am unable to find out how to add files to the same output directory instead of overwriting it every time.</p>