Yup, you nailed it better than I did Rick. Though your partition strategy might not be just "per user." For example in the geo domain, it makes sense to route requests for particular cities to specific nodes. It'll depend on your application how you generate your routing rules.
Jim On 21 Feb 2011, at 14:51, Michael Hunger wrote: > You shouldn't be confused because you got it right :) > > Cheers > > Michael > > Am 21.02.2011 um 15:40 schrieb Rick Otten: > >> Ok, I'm following this discussion, and now I'm confused. >> >> My understanding was that the (potentially very large) database is >> replicated across all instances. >> >> If someone needed to traverse to something that wasn't cached, they'd take >> a performance hit, but still be able to get to it. >> >> I had understood the idea behind the load balancing is to minimize >> traversals out of cache by grouping similar sets of users on a particular >> server. (That way you don't need a ton of RAM to stash everything in the >> database, just the most frequently accessed nodes and relationships >> associated with a subset of the users.) >> >> >> >> >>> Hello JT, >>> >>>> One thing, when you say route requests to specific instances .. does >>>> that >>>> imply that node relationships can't span instances ? >>> >>> Yes that's right. What I'm suggesting here is that each instance is a full >>> replica that works on a subset of requests which are likely to keep the >>> caches warm. >>> >>> So if you can split your requests (e.g all customers beginning with "A" go >>> to instance "1" ... all customers beginning with "Z" go to instance "26"), >>> they will benefit from having warm caches for reading, while the HA >>> infrastructure deals with updates across instances transactionally. >>> >>> Jim >>> _______________________________________________ >>> Neo4j mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >> >> >> -- >> Rick Otten >> rot...@windfish.net >> O=='=+ >> >> >> _______________________________________________ >> 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
