I have great succesful with MongoDB and at this point, I think it's the best database out there. If you can live without transaction, then think about utilizin

I have great succesful with MongoDB and at this point, I think it's the best database out there. If you can live without transaction, then think about utilizing MongoDB. - Add index without blocking anything - Array index is transaprent from you. Same query for both of array or a single field. - Partial index allow you to query on index while keep index size small to a certain amount of document - TTL index help you avoid deleting document manually such as session data - Spatial index avoid you to not index document missing field - GEO spatial index is just awesome. Super easy to use - Good enough full text search - Data compression, out of the box - Data compression for replication as wel - Super easy to manage cluster: add, remove, hide node