The iSeries team at IBM in Rochester, MN put together a computer with 128GiB of RAM, 24 600MHz PowerPC processors, 5 100baseT ethernet adaptors, and an array of 270 8.5GiB hard drives.
To load it down, they needed 67 more computers to simulate the expected load of 100,000 simultaneous Notes users. Each simulated user sent e-mail to random other users, scrolled through views, opened databases, and so on. Average server response time was 67 msec; during the 6+ hour test, 97% of the mail generated was delivered, and the system didn’t become bogged down.
I’ve often wondered what they do in IBM Rochester, as we’ve driven past a few times. I guess now I know. Me, I just like reading through the numbers and marveling at it all.