title: Ask questions about ontology and graphdb
body: <p>I am just using Graphdb EE for evaluation.</p>
  
  <p>I intend to migrate my bigdata from Cassandra to Graphdb but i read the docs that it can contain 2^40 entity = 2,000B entities. I have few questions regarding it:</p>
  
  <ol>
  <li><p>Is a way to extend to unlimited entities?</p></li>
  <li><p>I want to use many repositories to manage my data and the way to connect them to use as single repo ?</p></li>
  <li><p>Is there a way to search on multiple entites and on multiple properties (already indexed on elasticsearch) /entity?</p></li>
  <li><p>Do i need to create each ES connector all properties /per entities to get the best performance?</p></li>
  </ol>