title: Cassandra two nodes with redundancy
body: <p>I have setup two servers to both run Cassandra by following the documentation in the DataStax website. My current setup is to have</p>
  
  <blockquote>
    <p>1 seed node (configured in both yamls)</p>
  </blockquote>
  
  <p>When running, both nodes are up (when testing via nodetool) and both seem to have the data replicated correctly but I've noticed that when I bring down the seed node, the other node doesn't allow client connections (neither via their API or by connecting to cqlsh) which is a problem.</p>
  
  <p>My requirement is to have two servers which are perfect replicas of each other and in case one server is temporary down (due to disk space failures for instance), the other server can take over the requests until the broken server comes back online.</p>
  
  <p>Given this requriement, I have the following questions:</p>
  
  <ol>
  <li>Do I need to setup both nodes as "seed" nodes?</li>
  <li>How would I make sure everything is replicated across both servers? Does this happen automatically or is there some setting somewhere I need to set?</li>
  </ol>
  
  <p>Many thanks in advance,</p>