asp.net mvc 4 - SignalR and multiple server instances -

today web application (asp.net mvc4) running once (1 instance).
if action needs push clients, in way:

  public actionresult someaction(...)    {      // stuff happenning here...      // ...       // push notify      var hubcontext = globalhost.connectionmanager.gethubcontext<myhub>();      hubcontext.clients.group("somegroup").pushsomething();   } 

now web application needs run in multiple instances, load balancer redirects users different instances of same application.

a client using http://someipaddress or http://otheripaddress , should feel , same client.

the question is, how use signalr in case? multiple hubs

i suppose following:

  public actionresult someaction(...)    {      // stuff happenning here...      // ...       // push notify      foreach (var hub ....)  // <-- this!            hubcontext.clients.group("somegroup").pushsomething();   } 

but i'm not sure.

other information: app running in windows azure, , "instances" defined "azure web site number of instances"