Since gWHIZ asked so nicely, here is a quick summery of the WWDC setup (list price as of today):
- 9 MacPro, ATI x1900 XT, 4 GB, 2×2 2.66GHz: $31.023
- 19 30-inch Cinema Display: $34.181
- 18 Vesa Mounts: $522
- Gigabit Switch and Cabling: I don’t know what was used, but it’s cheap nowadays
- Custom-built plywood wall: priceless!
The networking was probably the weakest link in the setup. All machines were on the same network. Optimisation is possible by putting the machines into two networks, both connected to the same frontend machine. Another optimisation can be implemented in Chromium by having a binary tree to submit the GL command stream.
Some money can be saved on the render nodes, since I don’t believe all the RAM is needed. Likewise, profiling might show that slower processors are sufficient.