Jason Shao explains on his blog how they do loadtesting of their web-based portal application on Amazon EC2.
What raised my interest was that they’ve added the OpenDS ldap directory server in the image, as it was faster and easier than dealing with their usual infrastructure.
This is not the first time we see customers deploying OpenDS in the cloud. As a matter of fact, I think the first in production deployment of OpenDS was on network.com. More recently, Arnaud posted an article and performance numbers on running OpenDS on Amazon EC2.
If you are building services on the cloud and need authentication, authorization or storing profiles for your users, OpenDS provides a standard based solution (LDAP) that is very easy and fast to deploy. Give it a try !