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