I assume Pablo is running embedded. Is that correct?
Michael Am 01.02.2011 um 13:21 schrieb Peter Neubauer: > Also, > have you taken a look at the returned document? Transferring thousands > of relationships and parsing them as JSON on both client and server > might not be optimal. > > 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://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > > > > On Tue, Feb 1, 2011 at 1:17 PM, Michael Hunger > <michael.hun...@neotechnology.com> wrote: >> It sounds as if you are looping through all of them? Have they all the same >> relationshiptype and direction? >> >> Otherwise perhaps use node.getRelationships(type, direction) >> >> Perhaps you can also use a traverser for accessing the relationship? >> >> Cheers >> >> Michael >> >> Am 01.02.2011 um 12:37 schrieb Mattias Persson: >> >>> 2011/2/1 Pablo Pareja <ppar...@era7.com> >>> >>>> Hi all, >>>> >>>> I'm working on a project with millions of nodes and relationships and I'm >>>> using Neo4j for it. >>>> I'm doing some tests and I'm surprised of how slow it gets when it comes to >>>> getting specific relationships >>>> from one node... >>>> >>>> How's it actually implemented? >>>> >>>> The node I want to get the relationships from is indexed so getting there >>>> is >>>> almost instantaneous, however >>>> looping over its outgoing relationships seems to be really slow. >>>> In the last test I just did it took about 10 minutes for retrieving around >>>> 45.000 outgoing relationships. >>>> >>> >>> What kind of heap settings and memory mapping configuration are you using? >>> This sounds like disk swapping IMHO. 45000 relationships are quite few and >>> should take well below a second to get. But if you just want to get a >>> specific relationship (based on a property value or other node or something >>> similar) then indexing would be a faster solution. Maybe something like >>> this: >>> >>> RelationshipIndex index = graphDb.index().forRelationships( >>> "my-relationships" ); >>> ... >>> Relationship myRelationship = myNode.createRelationship( myOtherNode, >>> myRelationshipType ); >>> index.add( myRelationship, "myKey", "myValue" ); >>> ... >>> Relationship relForMyKey = index.get( "myKey", "myValue" ).getSingle(); >>> for ( Relationships relBetweenMyNodes : index.get( null, null, myNode, >>> myOtherNode ) ) { >>> System.out.println( "Relationship " + relBetweenMyNodes + " found" ); >>> } >>> >>> Does that help you? >>> >>> >>>> I've also been checking the wiki site for the Index Framework and there's >>>> only one small paragraph talking about >>>> indexing relationships but not about how to create them >>>> >>>> RelationshipIndex friendships = graphDb.index().forRelationships( >>>> "friendships" ); >>>> // "type" isn't a reserved key and isn't indexed automatically >>>> Relationship relationship = friendships.get( "type", "knows", morpheus, >>>> trinity ).getSingle(); >>>> >>> >>> I'll try to update the wiki page with a little more/better information! >>> >>>> >>>> >>>> so do you have any idea of the proper way for indexing relationships? >>>> Thanks in advance, >>>> _______________________________________________ >>>> Neo4j mailing list >>>> User@lists.neo4j.org >>>> https://lists.neo4j.org/mailman/listinfo/user >>>> >>> >>> >>> >>> -- >>> Mattias Persson, [matt...@neotechnology.com] >>> Hacker, Neo Technology >>> www.neotechnology.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 >> > _______________________________________________ > 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
