hi Siri,

Before choosing any database use the Brewer's CAP theorem to find what kind of features you are looking at and what nosql datastores/RDBMS databases fit into .

Deciding on either NoSQL or RDBMS depends on the problem and what kind of data model you'd like to build. Here is a comparision of various NoSQL datastores

http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis

Thanks

Thank you very much..