I would not consider this low hanging fruit btw Den onsdagen den 3:e augusti 2011 skrev Niels Hoogeveen<pd_aficion...@hotmail.com>: > > Hmmm... Does that require the inclusion of golden parachutes as well? > Anyway, <addressing the readers of this message that have time allocation > authority>. I hope my suggestion, or another technical solution that solves > the same issues will be picked up for 1.5. This is as far as I can tell > pretty much low hanging fruit. There are probably all sorts of tweaks that > can improve the performance of Neo4j, but this one can improve the > performance of Neo4j big time (under certain conditions). As a user who is > confronted with several very densely connected nodes, I have tried all sorts > of means to solve my issues, but none as rewarding as a solution in core > would be. > Niels >> Date: Wed, 3 Aug 2011 16:31:04 +0200 >> From: matt...@neotechnology.com >> To: user@lists.neo4j.org >> Subject: Re: [Neo4j] Node#getRelationshipTypes >> >> A golden helicopter might do the trick :) >> >> 2011/8/3 Niels Hoogeveen <pd_aficion...@hotmail.com> >> >> > >> > How does one persuade the time allocation authorities? >> > Niels >> > >> > > Date: Wed, 3 Aug 2011 09:28:45 +0200 >> > > From: matt...@neotechnology.com >> > > To: user@lists.neo4j.org >> > > Subject: Re: [Neo4j] Node#getRelationshipTypes >> > > >> > > Yup, it's a pretty sane approach and somewhat along the lines of how I >> > feel >> > > it would be done. It's been said a long time that "this functionality >> > will >> > > be implemented some day" and it's just that a significant amount of time >> > > have to be invested... maybe not for implementing it, but for discovering >> > > all bugs and inconveniences to have it on par with production quality. >> > And >> > > that kind of time haven't been allocated yet. >> > > >> > > I appreciate your thoughts and time on all this! >> > > >> > > Best, >> > > Mattias >> > > >> > > 2011/8/3 Niels Hoogeveen <pd_aficion...@hotmail.com> >> > > >> > > > >> > > > I would like to make a suggestion that would both address my feature >> > > > request and increase performance of the database. >> > > > >> > > > Right now the NodeRecord >> > (org.neo4j.kernel.impl.nioneo.store.NodeRecord) >> > > > contains the ID of the first Relationship, while the RelationshipRecord >> > > > contain the ID's of the previous and next relationship for both sides >> > of the >> > > > relationship. >> > > > >> > > > My suggestion is as follows: >> > > > >> > > > Create a new store: >> > > > >> > > > noderelationshiptypestore.db >> > > > >> > > > The layout of this store is given by the NodeRelationshipTypeRecord: >> > > > >> > > > id >> > > > previousrelationshiptype >> > > > nextrelationshiptype >> > > > firstrelationship >> > > > >> > > > The NodeRecord would now need to point to the first outgoing >> > > > NodeRelationshipType and to the first incoming NodeRelationshipType >> > instead >> > > > of to the first Relationship. >> > > > >> > > > On insert of a Relationship, one side of the relationship will update >> > the >> > > > store from the outgoing side, the other side will update the store for >> > the >> > > > incoming side. >> > > > >> > > > I will list the steps to take here for the outgoing side (the incoming >> > side >> > > > is almost identical). >> > > > >> > > > From the NodeRecord getFirstNodeRelationType (outgoing). >> > > > >> > > > Keep following NextRelationshipType until the desired record is found. >> > If >> > > > no record exists, create one, make the current >> > FirstNodeRelationshipType in >> > > > the NodeRecord (if it exists) the NextRelationshipType of the created >> > > > NodeRelationshipType (and make the created one the previous of the >> > current >> > > > one) and make the created NodeRelationshipType the >> > FirstNodeRelationshipType >> > > > in the NodeRecord. >> > > > >> > > > In other words: find the NodeRelationshipTypeRecord in the linked list. >> > If >> > > > none exists, create a NodeRelationshipTypeRecord, prepend it to the >> > existing >> > > > list and change the entry point in the NodeRecord. >> > > > >> > > > We no
-- 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
