title: How to create multiple connection to one specific address in C++ GRPC client
body: <p>I wrote a c++ grpc client, and wanted to create multiple connection by create  multiple channel, just like the hello world <a href="https://github.com/grpc/grpc/blob/master/examples/cpp/helloworld/greeter_async_client.cc#L110" rel="nofollow noreferrer">example</a>.</p>
  
  <p>But only one connection for the specific address was created. So how to create multiple connection to the server?</p>