title: Diagramming server connections in Visio - what direction should arrows point?
body: <p>Suppose I would like to depict data flow between two servers in Visio.</p>
  
  <p>I have boxes to represent servers and arrows to represent communication / data flow.</p>
  
  <p>In this situation:</p>
  
  <ul>
  <li>Server A always initiates connections to Server B.</li>
  <li>Server A reads from server B, but does not write.</li>
  </ul>
  
  <p>How would this be depicted? Which way would the arrows point?</p>
  
  <p>Is there are convention used for arrows connecting these two servers? Is it based on...</p>
  
  <ul>
  <li>Which server initiates connections to the other</li>
  <li>Whether the operation is read, write, or both</li>
  </ul>