title: Service Fabric Reliable Collections Performance
body: <p>I need to store a lot of data in Reliable Dictionaries on Service Fabric.  We are implementing an event store as a number of Reliable Dictionaries, so every event emitted by the domain ends up in the store. I would like to know the difference in performance in the two following scenarios:</p>
  
  <ul>
  <li>use one (very large) Reliable Dictionary to store all events for a certain aggregate type : this results in a small number of dictionaries, each containing millions of events</li>
  <li>use a small Reliable Dictionary to store the events of a single aggregate instance : this results in a LOT of small dictionaries (think millions) each containing a few events</li>
  </ul>
  
  <p>In light of the replication of state, and read and write performance, what would be the most efficient way forward?</p>