title: The loadbalancing algorithm on Amazon EC2 loadbalancer
body: <p>We plan to do some performance test on a web site hosted on some Amazon EC2 instances.  The question is,  if all the HTTP traffic come from the same IP addresses (say, in the case of many different client hosts sharing the same public IP),  will the EC2 loadbalancer forward all traffic to only one of the web servers (instances)? </p>