[pi-e-sigma]

How exactly is it different from No-SQL? No schema? Check. No consistency? Check. (eventually consistent) Key-value store? Check. (because it's using ZooKeeper under the hood) Promising amazing results and freeing you from the chains of the SQL? CHECK!

[nathanmarz]

Everything you wrote here is false, with the exception of Rama not using SQL. Rama has strong schemas, is strongly consistent, and is not limited to key/value (PStates can be any data structure combination). Zookeeper is used only for cluster metadata and is not involved with user storage/processing in any way.