Better method.

1.js

var zetta = require('zetta');
var PeerRegistry = require('zetta').PeerRegistry;
var DeviceRegistry = require('zetta').DeviceRegistry;

zetta({ peerRegistry: new PeerRegistry({path: './mypeers', collection: 'peers'}), registry: new DeviceRegistry({path: './mydevices', collection: 'devices'})})
  .listen(3000);