Stateful Compute Server

  • Remembers client data like Session-Cookie Authentication (state) from one request to the next
  • From the above diagram, user A’s session data and profile image are stored in Server 1
  • To authenticate User A, HTTP requests must be routed to Server 1
  • If a request is sent to other servers like Server 2, authentication would fail because Server 2 does not contain User A’s session data
  • Similarly, all HTTP requests from User B must be routed to Server 2; all requests from User C must be sent to Server 3


Stateless Compute Server