HBASE vs Cassandra

Ouch..

Jonathan Ellis: HBase is a steaming pile of poo that will eat your data and crush your soul, and here is an extensive list of technical reasons why that is the case.

Some Guy at MapR: Cassandra was replaced by HBase at Facebook, also at least we aren't MongoDB. Plus we magically fixed all the above issues by adding some "Enterprise" fairy dust (for only $5000 per node).

http://www.informationweek.com/software/enterprise-applications/big-data-debate-will-hbase-dominate-nosq/240159475