hmsonline/storm-cassandra — pull request #25 by sorenmacbeth (2013-08-19 22:35:10+00:00)
Title: Switch CassandraMapState to use store storm keys as rowkeys.

Storing Storm's state keys as composite columns did not scale given the amount and rate of data that we were trying to push into cassandra. I modified the map state to use Composite row keys instead of composite columns, which has been working great.