Is Cassandra production ready for Ruby on Rails?

Question

I\'m working on a project that is considering using Cassandra as a database. We would like to eventually migrate to Cassandra even if we use MySQL to start with, given its

Answer 1

I'm researching Cassandra, MongoDB, and CouchDB right now.

One way to tell which has the most developer support, is by checking the number of watchers on the highest rated github project for each. At least as a rough estimate.

Right now it's

852 - MongoDB http://github.com/jnunemaker/mongomapper

544 - CouchDB http://github.com/jchris/couchrest

178 - Cassandra http://github.com/fauna/cassandra

Although, I have to say with a bunch of high profile sites (Twitter, Digg, Reddit, etc) recently announcing that they're moving to Cassandra, this is a big vote of confidence for them.

Mongo seems to have the most and best documentation so far. Their auto-sharding is still in alpha though so how well it scales still remains to be seen I think.

I'm just starting to learn about all this stuff, so if others have insight please share.