title: Signalr scaleout with sql backplane
body: <p>I have looked in to <a href="https://www.asp.net/signalr/overview/performance/scaleout-in-signalr" rel="nofollow noreferrer">Introduction to Scaleout in SignalR</a> and <a href="https://www.asp.net/signalr/overview/performance/scaleout-with-sql-server" rel="nofollow noreferrer">SignalR Scaleout with SQL Server</a> documentations but there are some confusing things for me regarding how it actually works.</p>
  
  <ol>
  <li>How does backplane identifies all the connected servers to it? Is there a way of getting a list of connected servers from the backplane?</li>
  <li>If two servers have two different dns names (ex:- abc.com and 123.com) but connected to the same sql backplane does the messages are sent to those different dns servers as well?
  . If so if a client is connected to abc.com but the request sent to 123.com, will it be delivered to the client via abc.com?</li>
  <li>In documentation it says that all the servers save the messages in their local cache. Is there a way to know that a specific server received this message so we can log it some where?</li>
  </ol>