title: What is the difference between Core and Task node in EMR
body: <p>I am using Amazon EMR , what is the difference between the core node and task nodes In EMR?</p>
  <p>If I have 20 GB of Data should I give more computation to my Core nodes or task nodes?</p>
  <p>Please can someone explain how 20 gb of data will be processed with such Configurations given below.</p>
  <p><strong>core node Config</strong></p>
  <pre><code>c3.8xlarge
  32 vCore, 60 GiB memory, 640 SSD GB storage
  EBS Storage:none
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as32units
  
  m5.xlarge
  4 vCore, 16 GiB memory, EBS only storage
  EBS Storage:64 GiB
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as4units
  i3.xlarge
  
  4 vCore, 30.5 GiB memory, 950 SSD GB storage
  EBS Storage:none
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as4units
  </code></pre>
  <p><strong>Task Node Config</strong></p>
  <pre><code>c3.8xlarge
  32 vCore, 60 GiB memory, 640 SSD GB storage
  EBS Storage:none
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as32units
  
  c3.4xlarge
  16 vCore, 30 GiB memory, 320 SSD GB storage
  EBS Storage:none
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as16units
  
  c3.xlarge
  4 vCore, 7.5 GiB memory, 80 SSD GB storage
  EBS Storage:none
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as4units
  
  m5.xlarge
  4 vCore, 16 GiB memory, EBS only storage
  EBS Storage:64 GiB
  Maximum Spot price: 100 % of On-demand price
  Each instance counts as4units
  </code></pre>