title: How to set the VCORES in hadoop mapreduce/yarn?
body: <p>The following are my configuration :</p>
  
  <pre><code>**mapred-site.xml**
  map-mb : 4096 opts:-Xmx3072m
  reduce-mb : 8192 opts:-Xmx6144m
  
  **yarn-site.xml**
  resource memory-mb : 40GB
  min allocation-mb : 1GB
  </code></pre>
  
  <p>the Vcores in hadoop cluster displayed 8GB but i dont know how the computation or where to configure it.</p>
  
  <p>hope someone could help me.</p>