Re: [Neo4j] Compacting files?
On Wed, Jun 2, 2010 at 9:30 AM, Johan Svensson jo...@neotechnology.comwrote: Alex, You are correct about the holes in the store file and I would suggest you export the data and then re-import it again. Neo4j is not optimized for the use case were more data is removed than added over time. I like Postgres Auto Vaccum feature. I think if neo Reuses the holes it's already nice. Some kind of compression and truncate of the files would be great. In my opinion. Just my 2 cents, Thomas ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] [Neo] Newbie question
On Tue, May 25, 2010 at 6:00 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Thomas, if your dataset is that small, you could just start at any point, e.g. iterating over all cars, and looking at every car node if it is connected to the right nodes (only shown with the year node). I updated the GIST at http://gist.github.com/411699 to reflect this. This is a very crude example, but given your amount of data, you could either start at the cars, or from e.g. a color or year node, that you could find using Lucene(not included in this example, I am connecting nodes to the reference node instead). Does that help? Sure does. I know I have little objects to traverse, but I was more currious on how to handle on a larger set of object. What has made me consider Neo is the seamless way to enrich my data-set with new relations as I progress. My idea is to add relations to represent aspects of the objects that can be searched for. For example: one day I create a crawler that will update notes do map the model number to some feature (say the number of doors the car has). Then I can extend my UI to allow users to search for that criteria too (in an ad-hoc manner). In such a case adding lucene indexes may not be that easy. If the graph has huge, maybe it would make since to start traversal from the nodes that will yield the smallest starting graph. Thomas ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo] Newbie question
I started looking into Neo4J and it has some interesting ideas. I have been brainstorming on how to use it in a project I have. And have come up with some questions: 1) In the Matrix example (I saw it in several videos), what whould be the proper way to query: All people that Neo knows and love him?' In this case it's a single hops, so I think the way is to iterate through all love relations and see if the come back to Neo. But if we have more hops would we need to have a traversal in a traversal? 2) Is there a simple way to know how many edges/relation of a certain type come out of a node? I figure I can iterate throw the relations, but I was thinking of using this to choose the cheapest starting node for a traversal. 3) Let say I have a Car graph, with: ReferenceNode (RN) -- Cars RN --- Manufactures -- Ford / GM/ SAAB/ Volvo etc. RN --- Colors --- Grey, Silver, RN --- MakeYear --- 2000, 2001, 2002 A given car has a relaction to a Manufactures, Color, and Make year: Cars --- aCar aCar -- Silver aCar --- 2000 aCar --- SAAB How can I get all the 2000 - 2001, Silver, SAAB? I know I could have year as a property, but I want this is just an example to understand how to model similar problems. Thanks for any tips, Thomas ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
