Re: transparent clusters + sessions

>If I have say 20 web servers in a cluster behind something like a Cisco >LocalDirector, will session data remain constant over the 20 web servers if >they use a shared NFS or similar mount to save session data on? Almost for sure, yeah, but NFS is probably not the best answer, unless you know how to make NFS better than all the geeks I know who roll their eyes at it. Hey, I've never even *seen* NFS, as far as I know, so it's all the same to me... Assuming you are already opening an SQL connection on most pages that need sessions anyway, just stuff your session data into a single SQL back-end database. http://php.net/session_set_handler has sample code for MySQL last time I looked, but porting that to any SQL should be a five-minute + 1-hour testing job. Oh yeah: The session_write happends *AFTER* the browser connection is long dead. Write yourself a little error_handler and *LOG* all the boo-boos instead. http://php.net/set_error_handler Even if you're *NOT* using SQL, it still might beat out NFS for performance/reliability/scalability. You'll have to test on our hardware/OS to be sure. -- Like Music? http://l-i-e.com/artists.htm