No. CouchDB is good for storing important data, slow at writing, and bad at ad-hoc querying. MongoDB is lightning fast at writing (provided you haven't got ind

No. CouchDB is good for storing important data, slow at writing, and bad at ad-hoc querying. MongoDB is lightning fast at writing (provided you haven't got indexes, or your indexes fit in RAM), good at ad-hoc stuff, and a little more durable than /dev/null. Just remember to back up occasionally.