by John Sequeira
only works if you can put all your data in RAM, according to O'Reilly's Andy Oram. That's a big limitation.
OTOH, he also mentions that there are commercial alternatives for MySQL clustering that don't have this limitation, like Emic's clustered MySQL.
Also via Jeremy Z, very cool slides on LiveJournal's progression from vanilla LAMP site running on rented h/w to fault-tolerant megasite
I have to say, I love case studies like this. They're great ammo if you need to pitch an open source alternative, or maybe just keep your Oracle rep honest.
Is MySQL clustering ready for prime-time?