title: Proxy load-balancing with GRPC streaming requests
body: <p>We use streaming RPCs to send big files to the GRPC server. Like this:</p>
  
  <pre><code>service FileReceiver
  {
      rpc addData(stream DataChunk) returns (Empty)
  }
  </code></pre>
  
  <p>Is it possible to use proxy load balancer in this case, so that load balancer won't switch server in the middle of streaming request? Will it scale well with increased number of clients?</p>