The above graph and this MySQL performance blog story are from last year, but I believe are still relevant and instructive now. Sure, the FusionIO is faster, but how the hell can you beat a single SSD in terms of price/performance?
- RAID 10: 4.8 transactions per minute per dollar
- SSD: 27 transactions per minute per dollar
- FusionIO: 3.6 transactions per minute per dollar