[Neo] Latest Gremlin ecosystem summary

Hi all, just wrote up on the current emerging ecosystem around graphs and Gremlin/Neo4j. I personally am totally excited about this, thanks everyone for the great discussions and contributions! http://blog.neo4j.org/2010/02/yay-graph-processing-infrastructure-is.html Cheers, /peter neubauer

Re: [Neo] Dijkstra search on a big graph

Hi, On Fri, Feb 5, 2010 at 6:36 PM, Anton Popov popov.ua.w...@gmail.com wrote: Hello all, I'm still doing my tests on Neo4J. I've imported some data to Neo4J database trying to search a shortest path search using Dijkstra implementation from neo4j-graph-algo package. As a result - I get

[Neo] Database does not recover after unclean shutdown

Hi, while initially I was impressed by the graph traverlas speed, Im curently testing how the database survive after unclean shutdown. To do so, Im just running my test project as a java console app without registering a shutdown hook and then accidently killing the JVM via Ctrl+C or killall

Re: [Neo] Database does not recover after unclean shutdown

I think johan just committed a fix for this... --Original Message-- From: Dmitri Livotov Sender: user-boun...@lists.neo4j.org To: user@lists.neo4j.org ReplyTo: Neo user discussions Subject: [Neo] Database does not recover after unclean shutdown Sent: Feb 8, 2010 6:24 AM Hi, while

Re: [Neo] Database does not recover after unclean shutdown

Yep, that's right... go get the latest neo4j-kernel version and you''' most likely be fine 2010/2/8 Rick Bullotta rick.bullo...@burningskysoftware.com: I think johan just committed a fix for this... --Original Message-- From: Dmitri Livotov Sender: user-boun...@lists.neo4j.org To:

Re: [Neo] Database does not recover after unclean shutdown

Yep, I was using the latest beta binary. Will retry with the trunk now, thanks guys ! Dmitri Mattias Persson wrote: Yep, that's right... go get the latest neo4j-kernel version and you''' most likely be fine 2010/2/8 Rick Bullotta rick.bullo...@burningskysoftware.com: I think johan just

[Neo] Node with the millions of incoming relationships to - is this a proper way ?

A kind of architectural question now We're thinking on our graph model now, where we will have a lot of nodes of particular type. Something like the filesystem, where each fs element (node in neo4j terms) could be of type file or folder. We need to be able to separate and later query

Re: [Neo] Node with the millions of incoming relationships to - is this a proper way ?

Hello, Dmitri. We are using the first approach - a top level class node with entity nodes below them in the graph. In some cases, this is a flat collection of entities, in others, it is a more complex set of linkages accomplished via relationships. Our taxonomy model (something similar to

Re: [Neo] Dijkstra search on a big graph

Hello Johan, Thanks for your answer see my answers below: On 8 February 2010 11:15, Johan Svensson jo...@neotechnology.com wrote: Hi, How large heap have you set? I see that you have allocated 3G for memory mapping that leaves about 512M max left for heap size since OS (and other on OS

[Neo] Idea for project using neo4j - good idea?

Hi, I have an idea for a project for which I was considering using neo4j to implement. Given several hundred http request logs (in NCSA format), I'd like to build something that generates statistics on the paths that users take through the website, something like from page /a.htm, 50% of

Re: [Neo] Node with the millions of incoming relationships to - is this a proper way ?

Thanks for such detailed clarifications on your designs. But if we stay on million relations to a single node - will it harm on performance or so in comparison to Rick's last suggestion on having only top node model ? Dmitri Mattias Persson wrote: 2010/2/8 Rick Bullotta

Re: [Neo] Idea for project using neo4j - good idea?

Matt, take a look at the Site Usage Analytics example on the Neo4j Wiki, http://wiki.neo4j.org/content/Site_Usage_Analytics for some inspiration of possible node space layout. Would that be in the direction you are thinking? Cheers, /peter neubauer COO and Sales, Neo Technology GTalk:

Re: [Neo] Node with the millions of incoming relationships to - is this a proper way ?

2010/2/8 Dmitri Livotov dmi...@livotov.eu: Thanks for such detailed clarifications on your designs. But if we stay on million relations to a single node - will it harm on performance or so in comparison to Rick's last suggestion on having only top node model ? Well, all those relationships

Re: [Neo] Node with the millions of incoming relationships to - is this a proper way ?

2010/2/8 Dmitri Livotov dmi...@livotov.eu: Thanks for such detailed clarifications on your designs. But if we stay on million relations to a single node - will it harm on performance or so in comparison to Rick's last suggestion on having only top node model ? Well, all those relationships

Re: [Neo] Idea for project using neo4j - good idea?

Hi Peter, thanks for responding to my email. This example actually looks exactly like what I was thinking about - I guess I'm not the only one with such a basic idea :) Thanks again for the input! On Mon, Feb 8, 2010 at 3:10 PM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Matt,