Yes Postgres has disadvantages (I accidentally posted my comment too soon so that might have caused some confusion) but like I said it is: 1. Mature, 2. SQL is

Yes Postgres has disadvantages (I accidentally posted my comment too soon so that might have caused some confusion) but like I said it is: 1. Mature, 2. SQL is damn powerful, 3. Memory friendly (aka cost). RethinkDB is cool. I just never got into it to know how well it actually works. As for bottledwater we use Postgres + AMQP aka Rabbit + Listen/Notify. I'm not really a big fan of kafka even though it does have amazing scaling ability.