Scaling MySQL on a 256-way T5440 server using Solaris ZFS and Java 1.7
*cough*
(and then wipe coffee off the computer)
of course the real aim should be to scale with one instance on the machine as scaling with multiple instances on the one machine isn’t scaling at all - it’s scale out, but with more problems (now when one machine goes down, so do 1110202434 database instances).