For High Availability happiness Alejandro Borges recommends:
Check out CODA, GFS (SAN capable, fault tolerant, network logging file system) and the LVS.... AFAIK, thats the best of breed of the free HA solutions...
Linkage: * Coda - http://www.coda.cs.cmu.edu/* GFS - http://opengfs.org/ - (Open)GFS, the GPL one. Anyone know how it fares and compares to Sistina's?
* LVS - http://www.linuxvirtualserver.org/