title: Will using DNS failover work as a Multi-DC failover strategy?
body: <p>If I have a multi-DC cluster, <strong><em>DC1</em></strong> and <strong><em>DC2</em></strong>, where DC2 is only used for failover. And in the driver on the client side, I define the contact points using the domain names <code>(foo1.net, foo2.net, and foo3.net)</code>. I have foo* pointing to DC1 and if I ever detect any error with DC1, I will make the DNS route foo* to point to DC2.</p>
  
  <p>This approach seems to work on paper, but will it actually work? Any issues with this approach?</p>