[galaxy-dev] web application scaling

Hello, could I please get some more information on running multiple web server processes? I'd like to set up our local installation on a web server farm. I'm currently using SGE for all the heavy lifting, but am wary of having a single server on the front end. Any guidance would be appreciated. I'm currently using MySql for the db but am not adverse to switching to PostgreSQL if there was a reason to do so. And anything you'd like to share from your experience regarding hardware selection would be appreciated as well; I'm currently thinking of ordering several "inexpensive" servers. Have you noticed an "optimal" number of web servers, before traffic jams at the db server start to affect performance? Thanks, Ed Kirton US DOE JGI