Yes! It worked! Thanks a lot. Jacopo Farina 2011/10/18 Jacob Hansson <jacob.hans...@neotechnology.com>
> I think this might be another case of a problem that would be a lot easier > to solve if the python bindings pushed out full stack traces. It's in my > backlog to fix that. > > I'm gonna *guess* that the problem has to do with store upgrades. Are you > using the 1.5.M02 version of neo4j embedded? > > If so, you need to tell the database it's ok to upgrade the store, like > this: > > > from neo4j import GraphDatabase > db = new GraphDatabase('somefolder', allow_store_upgrade="true") > > On Mon, Oct 17, 2011 at 4:19 PM, Jacopo Farina <jacopo1.far...@gmail.com > >wrote: > > > Hi all, > > I'm trying to work with Neo4j embedded with Python, but, if I try to open > a > > database created with the Java batch inserter (neo4j 1.4) by using > > Python-embedded, I get the error described here > > https://trac.neo4j.org/ticket/275 > > The database works correctly when opened in Neoclipse or with neo4j > > stand-alone server (by replacing the data folder), and if I create a new > > database directly with Python embedded it works too. Is there a way to > > solve > > this problem? > > > > Then, how much is fast the neo4j-REST traverser compared with the Java > > embedded traverser on a 3 million nodes graph? > > > > As far as I know, we don't have any benchmarks that compare this. The speed > difference should not be huge though. The server is a lot slower for reads > and writes, but for traversals, the overhead of the server plays a much > smaller part. > > Sidenote: The size of your graph should generally not affect traversal > speed > (unless the graph does not fit in memory), what matters is how much of the > graph you traverse. In java embedded, we used to say that you get maybe 1 > 000 000 relationships traversed per second (although speed can be both > higher and much lower, depending on what your traversal does). > > > > > > Cheers! > > Jacopo Farinat > > _______________________________________________ > > Neo4j mailing list > > User@lists.neo4j.org > > https://lists.neo4j.org/mailman/listinfo/user > > > > > /Jake > > -- > Jacob Hansson > Phone: +46 (0) 763503395 > Twitter: @jakewins > _______________________________________________ > 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