[seiji]

It's MySQL with the Percona patches using InnoDB (not XtraDB yet).

I've looked into rethinkdb, but it's not quite yet ready for a bet-the-company-on-it install. We didn't order any extra $10k+ flash cards just to play around with.

The RamSan flash cards took a while to get ahold of too (the government (NSA if I recall correctly) buys them by the thousands).

[pmorici]

Is this worth the cost premium? It seems like you could get similar performance using 4 standard SATA SSD drives in a stripped RAID and the cost would be a bit less than 2k.