title: Strategies to sync mongoDB and couchDB
body: <p>What are some strategies to sync data between these two?</p>
  
  <p>The current scenario is a web app that works with MongoDB, mongoose and node, and a mobile app that uses pouchDB and syncs against CouchDB server, but how can MongoDB server and CouchDB server be in sync when data changes in any of them?</p>
  
  <p>I tried with some trigger when something changes in any of them, but it would be an infinite cycle because: MongoDB DocX changes --> CouchDB update DocX ---> MongoDB update DocX because it changed in CouchDB, and again ----> CouchDB update document DocX because it changed in MongoDB</p>
  
  <p>So, how are some good strategies to do something like this?</p>