On Wed, Jun 17, 2009 at 12:11 PM, Anders Nawroth<and...@neotechnology.com> wrote: > Hi! > > Regarding performance: you'll probably be better off using more > realtistic data. Then having 100k friends shouldn't be the common case I > guess! I think you can find some ways to create random graphs somewhere > in the source code of this component: > http://components.neo4j.org/graph-algo/ > > To gain really high performance you could use multiple threads, but > there's a lot to think about the get that kind of stuff right. > > For more performance tips, see the wiki: > http://wiki.neo4j.org/content/Neo_Performance_Guide > >>> Makes sense to me. One detail: make sure to use directed edges where it >>> fits your domain when presenting this stuff! :-) >>> >>> >> >> Is there another way of creating relations than with createRelationshipTo() ? >> I didn't understand that. >> > > There's no other way. But I don't get why you used bidirectional arrows > for relationships that per the domain should be directed. Just a detail > in your way to the describe the domain :-) -- Argentina doesn't live in > Charlie, right?! > >> Setting objects as properties? >> > > This is where you find the API docs where's such things are stated in > detail: > http://api.neo4j.org/ > > > /anders > > _______________________________________________ > Neo mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user >
I gave up my count(*) test and try something that hurts relational databases! //Data inserted So I have 4 persons (Charly, maxi, juani, laura) who buys 2 movies each in a for loop. That for loop runs 1k times. //SQL Database schema http://code.google.com/p/grafos2009/source/browse/trunk/mysql/video/create.sql Inserts are done with a python script that creates the inserts: http://code.google.com/p/grafos2009/source/browse/trunk/mysql/video/test.py Query to be done: http://code.google.com/p/grafos2009/source/browse/trunk/mysql/video/queries.sql //neo4j http://code.google.com/p/grafos2009/source/browse/trunk/src/main/java/org/seminario/Seminario.java SQL big select: 8000 rows in set (0.08 sec) neo4j 8000 lines: 2950 ms. Then I tried sql with 10k loop, and gave me (0.94 sec). I can't beat sql :( Comments are welcomed! PS: I know the select in the db is not the same as I do with neo4j, but calls my attention that big difference. _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
