Checkout CockroachDB if you want to have the 'add a node' for additional storage option like MongoDB has. It's Postgres compliant, for the most part, and has a

Checkout CockroachDB if you want to have the 'add a node' for additional storage option like MongoDB has. It's Postgres compliant, for the most part, and has a license that most of us can live with for the projects we build.