title: Difference between Auto-Scaling Policies in AWS fargate
body: <p>I started exploring fargate in Amazon Web Service and it is working as expected.<br>
  Now when I try to apply different auto scaling policy, I couldn't get the difference between <strong><em>Step-Scaling</em></strong> and <strong><em>Target Tracking policy</em></strong></p>
  
  <p><strong><em>I understand the step scaling policy is :</em></strong> </p>
  
  <p>We specify MULTIPLE thresholds Along with different responses.</p>
  
  <p>Threshold A - add 1 instance when CPU Utilization is between 40% and 50%</p>
  
  <p>Threshold B - add 2 instances when CPU Utilization is between 50% and 70%</p>
  
  <p>Threshold C - add 3 instances when CPU Utilization is between 70% and 90%</p>
  
  <p>And so on and so on</p>
  
  <p>(i.e) There are multiple thresholds</p>
  
  <p>1) But I couldn't understand how the target tracking policy works?<br>
  2) Not sure about the difference between Step scaling and Target Tracking policy</p>
  
  <p>Thanks,<br>
  Harry </p>