2011/5/27 Balazs E. Pataki <pat...@dsd.sztaki.hu> > Hello Ian, > > and welcome! :-) > > Reading the announcment about M03 ... > > http://blog.neo4j.org/2011/05/announcing-neo4j-14-m03-kiruna-stol.html > > ... I got excited about the "novel way of caching relationships based on > their direction". Can you explain what it actually means and in what > situations can we feel the performance boost? > > We previously had the problem that when a node has a couple of outgoing > and lots of incoming relationships and we want to just traverse the > outgoing relationships only neo4j seems to select the outgoing > connections by going throuh all connections (the million incoming and > the couple of outgoing) and deciding during iteration which is the > outgoing. If this becomes faster by not sequentially deciding about > relationship directions, than it would be awsome. >
It kicks in when relationships have been loaded into the cache and you request relationships based on direction and type, i.e. use one of the getRelationships methods on Node, or just use the standard expander and specifying directions. There and then it will only give you those for that type/direction w/o needing to filter or touch the others at all. All relationships still need to be loaded from the store though if they haven't been loaded. For that to be as efficient there will have to be a store format change and I'm sure that will come along also. > > Regards, > --- > balazs > > On 5/27/11 4:31 PM, Ian Robinson wrote: > > Hello fellow graphistas, > > > > With another two weeks gone, we’re another milestone closer to the > “Kiruna > > Stol” release. Today we’re releasing the third milestone in our journey > > towards the 1.4 products. The 1.4 M03 release brings lots of new > features, > > including self relationships, additions to the Webadmin interface, and > some > > fabulous performance improvements with our shiny new directionally-based > > cache. > > > > As usual, the packaged release is available from our download site. Grab > it, > > play with it and give us your feedback on the mailing list. Don’t forget > to > > be safe - this is a milestone release so back up your data! Enjoy! > > > > Ian Robinson > > Director of Customer Success, Neo Technology > > > > (For those of you who haven't yet rushed off to grab the release, and are > > still reading, a belated introduction. I'm Ian Robinson, and as you can > see, > > I have the delightful title of Director of Customer Success. That means > I'm > > here to help make you wildly successful in everything Neo4j and graph > > related. I'm based in London, but expect to see me pop up wherever Neo4j > is > > being used to address your complex data issues. Over the next few weeks, > > we're going to make it even easier for you to give us your feedback, make > > suggestions, and raise issues. In the meantime, you can contact me at > > ian.robin...@neotechnology.com, or through this community lists.) > > _______________________________________________ > > 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 > -- 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
