Brandon, I think you need to give us a bit more information about your data in order to get meaningful answers. When you say "data grows with time", you mean

Brandon, I think you need to give us a bit more information about your data in order to get meaningful answers. When you say "data grows with time", you mean the number and type of fields for an "entity" change right? Mongo or any document db fits that purpose well. I am not sure I understand your question about matching things up? You can store all "related" objects together in one document, you can "link" objects together like done in Riak (or with a list of incoming and outgoing relations in the document) or you can use a graph DB (like Neo4j).