cluster

I setup a MySQL 5.0 Cluster on a spare server with multiple Xen VMs and discovered that Drupal 6 (and most likely D7 as wel) as it exists today cannot function properly under the MySQL NDBCLUSTER engine. It seems that under the NDBCLUSTER engine (also known as NDB), D6 has a table called menu_router that fails to be converted.

I posted a bug report about it under the D6 platform as it is rather detailed, but I have an idea this will affect D7 as well.
http://drupal.org/node/391130

I am setting up 2 load balanced servers under 1 ip to run my Drupal sites (multisite installation).
The sites will be using a separate dedicated server for the MySQL databases, on the same rack and 100Mbps network for faster access.
All 3 servers (2 app servers load balanced under one ip and the dedicated mysql server) are on the same physical rack.

Several questions come to mind, in particular...

APPROACH 1: rsync /home directories accross both servers.