Anyone used Amazon EC2 with a database or other high IO operation?
jbellis: I work on the Cassandra distributed database for Rackspace.  A _lot_ of people start out trying Cassandra on EC2 but the universal conclusion has been that I/O performance is miserable.Anecdotally, Rackspace Cloud Servers I/O works much better, although the only serious head-to-head comparison I have seen is this one: http://pl.atyp.us/wordpress/?p=2240 (tl;dr: < 20MBps on writes with local storage or EBS on EC2 vs 100MBps+ on RCS)