I posted this as a comment on the blueprint, but I figured I'd say it here: The thing I'd worry about here is that LevelDB's performance (along with that of various other K/V stores) falls off a cliff for large values. Symas (who make LMDB, used by OpenLDAP) did some benchmarking that shows drastic performance loss with 100KB values on both read and write: http://symas.com/mdb/microbench/#sec4 It's not just disk latency, either - an SSD showed the same behavior: http://symas.com/mdb/microbench/#sec7 I'd recommend REALLY careful benchmarking with a variety of loads (and value sizes). -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
