I have just setup 2 new servers per ISPConfig's Cluster tutorial on HowToForge.com, with Debian, and everything appears to be working fine. How does one test the load balancing, though, to make sure it's working properly? I have read a lot online about load balancing and there are talks of different methods, DNS RR seeming to be the least best way, apache with the mod_proxy seeming one of the better routes without spending any money, or setting up an actual 3rd server to act as a load balancer. The ISPConfig tutorial mentions none of these options, so does it just work? Or does it use the apache mod_proxy method automatically? I just am trying to figure out a way to make sure this is working properly. Also, I have these 2 servers, per the tutorial, in master/master mysql replication. Now I am looking to use Amazon's DynamoDB so this shouldn't be an issue, but how would one after the fact, add server 3, 4, 5,...? Master/Master doesn't sound like the best for additional servers, but in this situation with just 2, I guess it's fine. I am wanting to make sure we don't run in to problems down the road when we need to add additional servers to our cluster to expand for our project.