title: Custom SignalR back plane implementation for unique pay load
body: <p>we are in a situation where millions of connections (approximately 30 million) will be connected to application. (SignalR Hubs)
  however 90% of them will be idle and main operation is <b> server push </b> to <b>specific client</b> thus i need to implement a scale out mechanism.</p>
  
  <p>so i came across <a href="https://channel9.msdn.com/Events/Build/2013/3-502" rel="nofollow">this fantastic talk</a> on channel 9 by Damian Edwards where he states that current implementations of backplanes for SignalR is very limited and in scenarios like mine a Custom scale out is needed specifically in server push situation. (at 58:29 of above talk)</p>
  
  <p>after spending many hours in web, i could not find any clear guidance on how to implement a custom backplane which suits my need.</p>
  
  <p><b>i would like to know how signalR back plane internally works</b> and basically how a backplane works in general. so i can implement my own one.</p>
  
  <p>any help, blog post etc.. is highly appreciated.</p>