database-server

MongoDB versus CouchDB... And any other "major players"

What are the major differences between MongoDB and CouchDB, and are there any other major NO-SQL database-servers out there worth mentioning? I know that CERN uses CouchDB somewhere in their LHC back-end; huge stamp of approval. What are MongoDB - and any other major servers' - references? Update One of the major selling points of Cou...

Recommended server layout/architecture for Rails application

What is the recommended server layout for a production Rails application that is expected to receive medium (not heavy, but not light either) traffic? I'm thinking of a setup running Apache and Passenger (mod_rails). How many application servers, web servers, and database servers make sense? How should they be set up to provide redundanc...