The link to mysql.com discusses a HA-cluster. That's a cluster where you have at least two nodes in a cluster, but a package (which contains one of more applications) will only run on one node at the time. That's very different from load balancing. Also the PDF file from Red Hat talks about a HA cluster. I can't get to the Veritas site, but our company gets hired to do consulting jobs for Veritas, and I've done their course about their cluster solution. That's also a high availability cluster.

I think it should be doable to do load balancing on the front end (the webserver), as I don't think I get the impressions there's any session handling going on. (You can still do load balancing with session handling, but that requires specialized software). But load-balancing on the database end is a totally different ballpark. If you have lots of money, you could buy Oracle Parallel Server, that is capable of running more than one server on the same database. But MySQL isn't that smart by a long shot.

Abigail