title: Can i just use 2 Redis/Sentinal servers to manage failover on my 2 server setup?
body: <p>I forgive me for my shallow knowledge, but I have not to figure out why I need 3 servers to manage fail-over with Redis?</p>
  
  <p>I have a application served under load-balancer with to server instances, and I am looking to setup Redis for session &amp; notification management.</p>
  
  <p>My requirement is simple that I want to install Redis on both servers and have a fail-over plan if one server fails so the the end-user do not gets affected in terms of session &amp; notifications.</p>
  
  <p>What are my options ? Thanks in advance.</p>