I have been searching on how to create a session aware, high availbility, apache / mysql cluster Trying to figure out how many servers i will need (minimum). Is it ok to use apache and mysql on the same machine if doing it as a cluster? I am just looking to improve performance to my servers. I am also looking at getting a BLADE server, which will help me out on the server issues and multiple computers, but on the same token, i am looking at putting 2 of these together, one opposite sides of the continent in case of disaster at 1 of the locations. This may not be the place to ask this, but maybe this advanced topic could be talked about? or possible explained on how to do it? Thanks in advance. Mistervlad.