title: Neo4j querying and aggregation across multiple instances
body: <p>I am planning to use neo4j for an event management system.  The involved entities are events, places, persons, organizations, so and so forth.  But inorder to keep each org data separate I plan to create separate DB instance for each org.  Becoz of this separation of Database instances, the 'Place' nodes are likely to get repeated in these mutliple db instances.</p>
  
  <p>So, now, is it possible to aggregate for events based on <code>Place</code> nodes from all db instances?  Or is it that I have to build my own custom aggregation like map-reduce?</p>
  
  <p>Thanks in advance for helping me out on this..</p>