Re: [Neo4j] How there are lesser writes

Thanks but can we get the code of evaluation results of neo4j write performance on large graph dbs having densely populated nodes are there any published research papers which use them? On 7/9/11, Jim Webber j...@neotechnology.com wrote: Hello Aliabbas, It's domain specific, but in general you

[Neo4j] Neo4j vs orient db

Is there any evaluation results and code availaible comparing neo with orientdb for very large graph databases? -- Aliabbas Petiwala M.Tech CSE ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user

Re: [Neo4j] What to do with Unable to lock store?

Can you please check that? use jps or ps -aux | grep java to look for other java processes. Could you please also provide the content of your graph.db/messages.log ? It might be that somehow the grails plugin is started twice by grails leading to this scenario. Cheers Michael Am 10.07.2011

Re: [Neo4j] Neo4j vs orient db

Hi there, no, I have not seen anything that way, at least not relevant studies. We have not seen any import over a couple of million records in OrientDB sa far. Cheers, /peter neubauer GTalk:      neubauer.peter Skype       peter.neubauer Phone       +46 704 106975 LinkedIn  

Re: [Neo4j] Neo4j vs orient db

I've seen a few studies but nothing very complete. I'm no expert by far but the jest I got was that as of late 2010, OrientDB had really fast load/read times but that Neo4j was *far* better at graph transversal. I am in the process of evaluating OrientDB from the perspective of dense graphs. I

Re: [Neo4j] Neo4j vs orient db

thanks andrew ! . Can you share with us your experiment for very large databases . Orient db also claims to be highly scalable and follows a distributed model? How does that compare to neo4js scalability? Neo4j seems to be more open and honest than orient db in describing its limitations?

Re: [Neo4j] clean database / unit tests

I just redid the same exercise with 1.4M06. No issues whatsoever with compiling the extension, but still getting code 500 responses. The tests for the plugin itself runs ok. So seems it runs fine in the localserver that gets compiled with the plugin but not when I drop it in with the 1.4M06

Re: [Neo4j] neo4j unable to lock store

Are you using the Grails Neo4j plugin or do you just use Neo4j natively from a Grails app? How did you configure the graph db? Since you're using WEB-INF/resources/db/neostore as path for neo4j, are you sure the user running the jvm has write permissions? Regards, Stefan Am Samstag, den

Re: [Neo4j] clean database / unit tests

I just removed the call to JSONObject.toString(result) and replaced it with {} and it now behaves. So something's going wrong with the JSON conversion. I'm not familiar enough to dig much deeper, but hopefully that'll let someone else figure out how to fix it. In the meantime returning empty JSON

Re: [Neo4j] clean database / unit tests

thanks so much will look into it do you by chance have the server stacktrace that produced the internal server error (500) Michael mobile mail please excuse brevity and typos Am 10.07.2011 um 17:13 schrieb Patrik Sundberg patrik.sundb...@gmail.com: I just removed the call to

Re: [Neo4j] clean database / unit tests

Nope, but I can get it for you if you give me some pointers where it should occur (just started to play with neo4j so not yet up to speed where everything goes and when). On Sun, Jul 10, 2011 at 5:30 PM, Michael Hunger michael.hun...@neotechnology.com wrote: thanks so much will look into it

Re: [Neo4j] What to do with Unable to lock store?

Thanks for the reply, I'm not using Grails plugin, I'm using native embedded neo4j. I'm redesigning my application just to make sure that I close the database after use. BTW, if I got that error again, would that mean that the database is corrupted? Is there anyway to restore it? -- View this

[Neo4j] Index got deleted when deploy to production

I'm building an app with neo4j, and I create one index for my node. I tested it locally it works fine, but when I deploy to EC2 which is using jetty (I'm using Grails, so I packed my application in war). Somehow I got NullPointerException because the index that I've created before deploying

Re: [Neo4j] What to do with Unable to lock store?

Hi, This error usually means you have another process trying to new EmbeddedGraphDatabaseService() to the same directory. The only way to have multiple threads talk to the same database is by passing a reference to the database to all threads that want it. e.g. new Thread() { x = new

Re: [Neo4j] Index got deleted when deploy to production

Can I use luke? -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/Index-got-deleted-when-deploy-to-production-tp3157195p3157205.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list

Re: [Neo4j] What to do with Unable to lock store?

no it is not corrupted it is just a second instance accessing the same store either from the same jvm or another how and where do you start your embeddedgraphdb? and if you don't shutdown the db cleanly it will have to recover at the next start Michael mobile mail please excuse brevity and

Re: [Neo4j] Index got deleted when deploy to production

the lucene tool is called luke just point it to the directory of your concrete index mobile mail please excuse brevity and typos Am 10.07.2011 um 20:47 schrieb noppanit noppani...@gmail.com: Is there any tool that I could use to look at lucene database? So, after packed the war file, I can

Re: [Neo4j] Index got deleted when deploy to production

Did you also copy you store directory with the graph and index data to ec2 to the same correct location that xou give to EmbeddedGraphDatabaseService? M mobile mail please excuse brevity and typos Am 10.07.2011 um 20:44 schrieb noppanit noppani...@gmail.com: I'm building an app with neo4j,

Re: [Neo4j] Index got deleted when deploy to production

When I open with Luke I got this error. No valid direction, please try another location. I point to the same folder as I use in EmbeddedGraphDatabaseService. And yeh, the grails prod war command takes care of that for me to pack the war and my db direction is int WEB-INF/resources/db. Thanks

Re: [Neo4j] Index got deleted when deploy to production

Do an ls on your Neo4j directory. Notice that there is an index directory. Also notice an index/lucene directory. Then notice an index/lucene/nodes directory. So forth and so on. Marko. On Jul 10, 2011, at 1:16 PM, noppanit wrote: When I open with Luke I got this error. No valid direction,

Re: [Neo4j] Index got deleted when deploy to production

I found the problem, when Jetty extracts the war file it ignores files with _ initial for some reason. Does anybody know why? Thanks a lot. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/Index-got-deleted-when-deploy-to-production-tp3157195p3157275.html Sent from

Re: [Neo4j] Index got deleted when deploy to production

but when I point luke to the database direction where I also use EmbeddedGraphDatabase to point at I got error Invalid location, please try another location Thanks. :) -- View this message in context:

Re: [Neo4j] Index got deleted when deploy to production

but when I point luke to the database direction where I also use EmbeddedGraphDatabase to point at I got error Invalid location, please try another location Thanks. :) -- View this message in context:

Re: [Neo4j] What to do with Unable to lock store?

How do you instantiate the GraphDatabase? Via resources.groovy? If so, make sure to set a destroyMethod. graphDatabaseService(EmbeddedGraphDatabase, 'my/path') { bean - bean.destroyMethod = shutdown } Next thing to check if Grails reloading causes the error. You might

Re: [Neo4j] How there are lesser writes

Hello Aliabbas, Thanks but can we get the code of evaluation results of neo4j write performance on large graph dbs having densely populated nodes are there any published research papers which use them? I don't know of any peer-reviewed research in this area. Jim

Re: [Neo4j] Index got deleted when deploy to production

As Marko said: the directory is: graph.db/index/lucene/node/my_index Michael Am 10.07.2011 um 22:21 schrieb noppanit: but when I point luke to the database direction where I also use EmbeddedGraphDatabase to point at I got error Invalid location, please try another location Thanks. :)

Re: [Neo4j] Index got deleted when deploy to production

Hi! sorry if I keep bothering you. I point to db/index/lucene/node/myindex now. I got this error. Unknown format version: -11 Thanks :) -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/Index-got-deleted-when-deploy-to-production-tp3157195p3157622.html Sent from

Re: [Neo4j] Index got deleted when deploy to production

Can you pack your db and provide it somewhere, perhaps on dropbox? That would be great for investigation. Thanks Michael Am 11.07.2011 um 00:40 schrieb noppanit: Hi! sorry if I keep bothering you. I point to db/index/lucene/node/myindex now. I got this error. Unknown format version:

Re: [Neo4j] Index got deleted when deploy to production

Luke versions are somewhat specific to lucene versions. Which version of Luke and which version of neo are you using??? - Reply message - From: noppanit noppani...@gmail.com Date: Sun, Jul 10, 2011 6:40 pm Subject: [Neo4j] Index got deleted when deploy to production To:

Re: [Neo4j] Index got deleted when deploy to production

Oh, you should use Luke 3.1.0 Thanks Rick for pointing that out. see here http://code.google.com/p/luke/downloads/list Luke releases are numbered the same as the version of Lucene libraries that they use (plus a minor number in case of bugfix releases). Cheers Michael Am 11.07.2011 um 01:23

Re: [Neo4j] Index got deleted when deploy to production

Oh lol, I missed like 3 versions. :( Thanks. It works now. :) -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/Index-got-deleted-when-deploy-to-production-tp3157195p3157666.html Sent from the Neo4J User List mailing list archive at Nabble.com.