Steven, the index is built into the DB, so you can use something like http://docs.neo4j.org/chunked/snapshot/tutorials-java-embedded-index.html to index all your nodes into Lucene (in one index, the node as key, the number of relationships as numeric value when creating them). When reading, you would simply request all keys from the index and iterate over them. I am not terribly sure how much fast it is, but given that you are just loading up documents, Lucene should be reasonably fast.
Let us know if that works out! Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/ - Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Tue, Sep 20, 2011 at 6:01 PM, st3ven <st3...@web.de> wrote: > Hello Peter, > > it's a pity that neo4j doesn't support full graph-scans. > > Is there maybe a possibility to cache more relationships to speed things up > a little bit. > I recognized that only the iteration over the relationships is taking hours. > The time to get all relationships of one node is quite fast. > > I think I could try your second solution: > - Store the relationships as a property in an Index (e.g. Lucene) and > as the index for all entries. Thus, you are using an index for what it > is good at - global operations over all documents. > > But I didn't understood it correctly. Do you mean an Index which stores the > ID of a relationship and creating such an Index for every node? > Could you maybe give me a code example for that? > That would be very kind of you. > > The first solution is not really realizable, because I don't know the number > of relationships of every node. > I would have to count the relationships before the insertion and that would > make my database useless for the node degree query. > > Thank you very much for your help! > > Cheers, > Stephan > > -- > View this message in context: > http://neo4j-community-discussions.438527.n3.nabble.com/Creating-a-graph-database-with-BatchInserter-and-getting-the-node-degree-of-every-node-tp3351599p3352509.html > Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
