I am fairly familiar with HBase, hence plan to use it as the backend. I went through the 'getting-started' tutorial, and have the example up and run. I am looking for a few pointers about the design(of familycolumn, key), and how/why it was designed in such way. And then like to lead to my next questions, is it flexible(and reasonable, beneficial) to store vertex, edge and properties separately? To do so, which code should I pay attention to?