title: Can a redis instance subscribe to other redis instance?
body: <p>I have a laravel with a redis instance on the local server.
  I have another laravel server with redis instance on the web.</p>
  
  <p>My local server needs to listen to the change in web server in the real-time matter. (like push notification from web server)</p>
  
  <p>Since php don't have background service. I'm wondering is it possible for the local redis instance subscribe to web redis instance and get the notification?</p>