title: Best practice for multi usage of socket.io in an application?
body: <p>Something like if Facebook uses socket.io. So they need a lot of socket to handle.</p>
  
  <p>Such as New Feed, Private message, Group message.
  And data need to be sent to the right person. Can anyone explain me how they handle this ? Maybe some code or pictures of workflow.</p>
  
  <p>Thanks.</p>