title: Both datacenters continue working when connection between is down
body: <p>Suppose we have one galera clusters in two data centers. one with 3 nodes and the other one with two nodes.</p>
  
  <p>When connection between them goes down, 3 nodes datacenter will be primery and continue working.but two node side will stop.</p>
  
  <p>How is it possible for both sides continue working and resync when connection established?</p>
  
  <p>Our data in one center is independent of the other side</p>