title: Hadoop mapreduce.job.reduces in Generic Option Syntax?
body: <p>I am trying to set the number of reducers to use via command line. It seems like I am using wrong syntax. I am using hadoop 2.5 (yarn) MR2.</p>
  
  <pre><code>hadoop jar mrjobs-0.1.jar com.example.Weather -D mapreduce.job.reduces=2 datasets/inputs output
  </code></pre>
  
  <p>This commands is not working when I added -D option else its working fine. </p>
  
  <p>Any help appreciated !</p>
  
  <p>thanks!  </p>