title: why gzip file size varies each time?
body: <p>When i am taring and gzipping a folder, each time i am getting a different file size. </p>
  
  <p>The contents of the directory is same and not changed. The compressed file size changes by 20 to 100 bytes. Is this a normal behavior? </p>
  
  <p>Does my data will get affected with this?</p>
  
  <p>Thanks</p>