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by coffeemug 4080 days ago
Slava @ Rethink here.

RethinkDB is based on a fundamentally different architecture from MongoDB. Instead of polling for changes, the developer can tell RethinkDB to continuously push updated query results in realtime -- check out http://rethinkdb.com/faq/ for more details on this.

Just FYI, Rethink does sharding and JavaScript queries (including callbacks) -- http://rethinkdb.com/api/javascript/js/. The `js` command interops with every other command in RethinkDB and works really well.