Actually there is no direction both in neo4j's datastore, you can use BOTH when querying.
On Mon, May 19, 2014 at 2:30 PM, Angelo Immediata <angelo...@gmail.com>wrote: > Hi Michael > > For hot dataset do you mean a dataset stored in memory? Well we tried both > for in memory dataset and for dataset on the disk > Well I don't know exactly how many relationships can have a node....the > worst case is the each node contains 4 relationship each one with direction > BOTH > > > 2014-05-19 13:22 GMT+02:00 Michael Hunger < > michael.hun...@neotechnology.com>: > >> Is this for a hot dataset, or one that has to be fetched from disk? >> How many rels do you usually have per node? >> >> >> On Mon, May 19, 2014 at 9:04 AM, Angelo Immediata <angelo...@gmail.com>wrote: >> >>> Hi there >>> >>> With my colleague, we are are buillding a route system by using neo4j >>> 2.0.3; so we are suing A* and Dijkstra algorithms in order to calculate the >>> shortest path, >>> I was wondering if the relationships number can affect the algorithm >>> perfomance. I mean, we have a graph with around 1 million (or more) of >>> nodes and 50 million of relationships. We have several types of >>> relationship; specifically we have: >>> >>> - relationships for cars: the most of relationships are of this type >>> - relationships for bikes >>> - relationships for pedestrian >>> - relationships for public transports >>> >>> When we execute Dijkstra and/or A* we can specify, in our PathExpander, >>> the type of the relationships we want to consider during the traverser, so, >>> my sensation is that the relationships number should not affect algorithm >>> performance since we will sparsely (almost never) consider all the >>> relationships types. Am I right? >>> >>> Thak you >>> Angelo >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Neo4j" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to neo4j+unsubscr...@googlegroups.com. >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "Neo4j" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/neo4j/YtOt_rNy9sA/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> neo4j+unsubscr...@googlegroups.com. >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neo4j+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
