title: what is the best way to migrate large data from vertica to redshift?
body: <p>We have hosted vertica on AWS and the total size of the db is 500GB. 
  So what is the fastest method to migrate the data from vertica to redshift ?</p>
  
  <p>one approach would be<br>
  1. export the vertica data to S3<br/>
  2. load the data from S3 to redshift. </p>
  
  <p>Is there any better approach ?</p>