Jim, Thanks for the valuable input... The use case I mentioned here (using only visited places) was a simplistic version of the real one, because, just as you said, I'd be getting large number of results in that case... I'd check out pattern matching and Cypher to ease me in my project... Neo4j team is truly awesome! You guys are always there to help...
On 6/18/11, Jim Webber <j...@neotechnology.com> wrote: > That's a great point. > > In Neo4j you can add properties to your relationships so that: > > Jim --VISITED (numberOfTimes: 20) --> Melbourne > > Then you can use the "numberOfTimes" property to determine whether or not > you'd like to include the person/city in the recommendations you're making. > In this case it seems I'm rather keen on Melbourne, so you might want to > recommend me to other folks who visit Melbourne a lot. > > As for whether it's more efficient than other databases, I suspect it is in > the general case since this is a graph operation which other kinds of stores > will have to reify for themselves (e.g recursive joins, big map/reduce job, > etc). The cost of these kind of operations in Neo4j tends to be very low. > > Jim > > > On 18 Jun 2011, at 07:56, faja...@gmail.com wrote: > >> Ah this discussion is interesting, I want to join and throw in sonme idea >> too. >> >> If a user can visit a place for multiple times. And if there are 100 user >> visit USA. So we should suggest top 10 only. >> >> Would traversing the graph be more efficient than normal database query? >> >> >> Sent from my BlackBerry® smartphone from Sinyal Bagus XL, Nyambung >> Teruuusss...! >> >> -----Original Message----- >> From: Aman <aman.6...@gmail.com> >> Sender: user-boun...@lists.neo4j.org >> Date: Sat, 18 Jun 2011 10:50:34 >> To: Neo4j user discussions<user@lists.neo4j.org> >> Reply-To: Neo4j user discussions <user@lists.neo4j.org> >> Subject: Re: [Neo4j] Generating suggestions in a Neo4j db >> >> Hi Jim, >> The way you mentioned, that will take care of these suggestions, >> thanks for the same. But here's a tougher problem.... >> If I have a database of 50k people, and I want to find friends based >> upon the places that those 50k people have visited (i.e. People who >> have visited same places as me should be suggested as friends to me), >> then how to to that... I've thought all that I could, but I always >> come up with something stupid... Any suggestions about this? >> >> On 6/18/11, Aman <aman.6...@gmail.com> wrote: >>> Hi Jim, >>> The way you mentioned, that will take care of these suggestions, >>> thanks for the same. But here's a tougher problem.... >>> If I have a database of 50k people, and I want to find friends based >>> upon the places that those 50k people have visited (i.e. People who >>> have visited same places as me should be suggested as friends to me), >>> then how to to that... I've thought all that I could, but I always >>> come up with something stupid... Any suggestions about this? >>> >>> On 6/18/11, Jim Webber <j...@neotechnology.com> wrote: >>>> Hi Aman, >>>> >>>> I'm puzzled. >>>> >>>> Why not >>>> >>>> Aman--HAS_VISITED-->USA >>>> Jim--HAS_VISITED-->India >>>> >>>> And if: >>>> >>>> Aman--FRIEND-OF-->Jim >>>> >>>> Then you just need to traverse from Aman following outgoing FRIEND_OF >>>> relationships to all your friends, and then traverse out their outgoing >>>> HAS_VISITED relationships to find places your friends have been. >>>> >>>> The general idiom with Neo4j is use indexes the find your start node >>>> (e.g. >>>> the Aman node in the above) then traverse from there. >>>> >>>> Jim >>>> >>>> _______________________________________________ >>>> Neo4j mailing list >>>> User@lists.neo4j.org >>>> https://lists.neo4j.org/mailman/listinfo/user >>>> >>> >>> >>> -- >>> Amandeep >>> +91-9878483857 >>> >> >> >> -- >> Amandeep >> +91-9878483857 >> _______________________________________________ >> 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 > -- Amandeep +91-9878483857 _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
