You have to consider both in-memory and disk representation. http://thinkaurelius.com/2013/11/01/a-letter-regarding-native-graph-databases/ http://thinkaureliu

You have to consider both in-memory and disk representation. http://thinkaurelius.com/2013/11/01/a-letter-regarding-native-graph-databases/ http://thinkaurelius.com/2013/11/01/a-letter-regarding-nativ... Some graph databases have direct references in-memory and thats great, but a poor organization on-disk and thats bad.