Re: [Neo4j] How there are lesser writes
Hello Aliabbas, It's domain specific, but in general you write less in a graph db because the power is in relationships. Imagine something akin to Digg where lots of users follow the postings of other users. Each time a writer posts something new, all of the followers will typically need to be updated. That's very write heavy. In a graph DB, that's a single write irrespective of how many followers an author has (think: updating the head of a linked list of postings). Easy huh? Jim ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] GSoC 2011 Neo4j Geoprocessing | Weekly Report #7
Hi, This week I wrote some overview documentation for the code review, added full delete operation for OSMLayer graph model - with relation rebuilding of the remaining geom nodes and added some more spatial type functions: ST_Area, ST_Box2D, ST_Buffer, ST_Centroid, ST_Length, ST_MaxX, ST_MinX, ST_MaxY, ST_MinY. Best Regards Andreas ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] How there are lesser writes
Hi there, Just answered in a discussion tangentially mentioning this at Quora, http://www.quora.com/Which-Relational-NoSQL-approach-will-you-recommend-for-storing-Trees-with-real-time-aggregation-from-child-nodes-to-Parent-nodes/answer/Peter-Neubauer /peter Sent from my phone. On Jul 9, 2011 1:44 PM, Jim Webber j...@neotechnology.com wrote: ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] How there are lesser writes
Hi to all, I think the power of graph dbs in reading (and especially deep traversal) operations - check http://markorodriguez.com/2011/02/18/mysql-vs-neo4j-on-a-large-scale-graph-traversal/ BTW, if we could have the full code of this or some other benchmark comparing neo4j with the respective in some-sql, would be a great showcase:-) Agelos On Sat, Jul 9, 2011 at 3:50 PM, Peter Neubauer neubauer.pe...@gmail.comwrote: Hi there, Just answered in a discussion tangentially mentioning this at Quora, http://www.quora.com/Which-Relational-NoSQL-approach-will-you-recommend-for-storing-Trees-with-real-time-aggregation-from-child-nodes-to-Parent-nodes/answer/Peter-Neubauer /peter Sent from my phone. On Jul 9, 2011 1:44 PM, Jim Webber j...@neotechnology.com wrote: ___ 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
Re: [Neo4j] web application and neo4j hosting
...if you want durable storage, via EBS, yes. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 10:37 AM To: user@lists.neo4j.org Subject: [Neo4j] web application and neo4j hosting Hi, I'm writing an web application with neo4j, but I'm not sure if any hosting support read/write local files? Does amazon ec2 support that? Thanks. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154806.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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
Re: [Neo4j] Neo4J or MYSQL Cluster
Hi to all, Michael, may I also humbly suggest Raffi has a good look at The Spring Data Graph http://www.springsource.org/spring-data/neo4j and the sample cineasts web app https://github.com/jexp/cineasts which show a standard web app, with social-ready capabilities (eg recommendations) build entirely on top of neo4j. With respect A' On Fri, Jul 8, 2011 at 10:24 PM, Michael Hunger michael.hun...@neotechnology.com wrote: Every interconnected data is actually a graph and for an e-comm site you have even more of them. Category trees, price-lines, customer purchases and likes, recommendations, product instances (of basic product types + attribute sets) etc. And much more. We also have experience in team in building java based e-commerce sites (but not based on Neo4j (yet)). There is a simple e-com example using neo4j for product categories on the wiki blog. http://blog.neo4j.org/2010/03/modeling-categories-in-graph-database.html http://wiki.neo4j.org/content/Warehouse Please ping us if you have more questions. Cheers Michael Am 08.07.2011 um 21:15 schrieb etc3: We are planning to build an e-comm site using MySQL as the backend database (Java middle-tier and presentation). The website is basic in terms of e-comm functionality; items, users, orders, etc. are the main entities. We want to plan for the future and ensure that we can scale up quickly based on increased usage of the site. We don't like MYSQL Cluster because, based on our findings, it does not scale well. The No-SQL databases (MongoDB, Couch) are nice, but don't support multi-record atomic transactions. Neo4J appears to be the best of both worlds since it scales and supports transactions. The only things that seems out of place for our use of Neo4j is that our data does not fit the social-graph model in the pure sense, nevertheless, I'm sure Neo4j would still work, but we wanted to get the community's take on our application of it in this scenario. Thank you Raffi ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] web application and neo4j hosting
Would you mind if I ask this question, what is the difference between S3 and EBS? Thank you. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154841.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J or MYSQL Cluster
Spring Data Graph is the Hibernate-like ORM layer for Neo4j, where annotations are used to define relationships and links? Raffi -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Agelos Pikoulas Sent: Saturday, July 09, 2011 10:45 AM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4J or MYSQL Cluster Hi to all, Michael, may I also humbly suggest Raffi has a good look at The Spring Data Graph http://www.springsource.org/spring-data/neo4j and the sample cineasts web app https://github.com/jexp/cineasts which show a standard web app, with social-ready capabilities (eg recommendations) build entirely on top of neo4j. With respect A' On Fri, Jul 8, 2011 at 10:24 PM, Michael Hunger michael.hun...@neotechnology.com wrote: Every interconnected data is actually a graph and for an e-comm site you have even more of them. Category trees, price-lines, customer purchases and likes, recommendations, product instances (of basic product types + attribute sets) etc. And much more. We also have experience in team in building java based e-commerce sites (but not based on Neo4j (yet)). There is a simple e-com example using neo4j for product categories on the wiki blog. http://blog.neo4j.org/2010/03/modeling-categories-in-graph-database.ht ml http://wiki.neo4j.org/content/Warehouse Please ping us if you have more questions. Cheers Michael Am 08.07.2011 um 21:15 schrieb etc3: We are planning to build an e-comm site using MySQL as the backend database (Java middle-tier and presentation). The website is basic in terms of e-comm functionality; items, users, orders, etc. are the main entities. We want to plan for the future and ensure that we can scale up quickly based on increased usage of the site. We don't like MYSQL Cluster because, based on our findings, it does not scale well. The No-SQL databases (MongoDB, Couch) are nice, but don't support multi-record atomic transactions. Neo4J appears to be the best of both worlds since it scales and supports transactions. The only things that seems out of place for our use of Neo4j is that our data does not fit the social-graph model in the pure sense, nevertheless, I'm sure Neo4j would still work, but we wanted to get the community's take on our application of it in this scenario. Thank you Raffi ___ 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 ___ 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
Re: [Neo4j] web application and neo4j hosting
Simplest difference is that EBS volumes are like storage devices that can be mounted to a running instance and provide file system functionality. S3 is more a general purpose durable storage engine, but doesn't directly allow mounting it is a file system. There are some hacks/3rd party ways to do it, but I'd avoid them for Neo4J usage. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 10:51 AM To: user@lists.neo4j.org Subject: Re: [Neo4j] web application and neo4j hosting Would you mind if I ask this question, what is the difference between S3 and EBS? Thank you. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154841.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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
Re: [Neo4j] web application and neo4j hosting
Oops - meant to say S3 doesn't directly allow mounting it *as* a file system. Also, S3 can be used as a backup/snapshot mechanism for EBS volumes. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Saturday, July 09, 2011 10:59 AM To: Neo4j user discussions Subject: Re: [Neo4j] web application and neo4j hosting Simplest difference is that EBS volumes are like storage devices that can be mounted to a running instance and provide file system functionality. S3 is more a general purpose durable storage engine, but doesn't directly allow mounting it is a file system. There are some hacks/3rd party ways to do it, but I'd avoid them for Neo4J usage. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 10:51 AM To: user@lists.neo4j.org Subject: Re: [Neo4j] web application and neo4j hosting Would you mind if I ask this question, what is the difference between S3 and EBS? Thank you. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154841.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J or MYSQL Cluster
Yeap On Sat, Jul 9, 2011 at 5:53 PM, etc3 e...@nextideapartners.com wrote: Spring Data Graph is the Hibernate-like ORM layer for Neo4j, where annotations are used to define relationships and links? Raffi -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Agelos Pikoulas Sent: Saturday, July 09, 2011 10:45 AM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4J or MYSQL Cluster Hi to all, Michael, may I also humbly suggest Raffi has a good look at The Spring Data Graph http://www.springsource.org/spring-data/neo4j and the sample cineasts web app https://github.com/jexp/cineasts which show a standard web app, with social-ready capabilities (eg recommendations) build entirely on top of neo4j. With respect A' On Fri, Jul 8, 2011 at 10:24 PM, Michael Hunger michael.hun...@neotechnology.com wrote: Every interconnected data is actually a graph and for an e-comm site you have even more of them. Category trees, price-lines, customer purchases and likes, recommendations, product instances (of basic product types + attribute sets) etc. And much more. We also have experience in team in building java based e-commerce sites (but not based on Neo4j (yet)). There is a simple e-com example using neo4j for product categories on the wiki blog. http://blog.neo4j.org/2010/03/modeling-categories-in-graph-database.ht ml http://wiki.neo4j.org/content/Warehouse Please ping us if you have more questions. Cheers Michael Am 08.07.2011 um 21:15 schrieb etc3: We are planning to build an e-comm site using MySQL as the backend database (Java middle-tier and presentation). The website is basic in terms of e-comm functionality; items, users, orders, etc. are the main entities. We want to plan for the future and ensure that we can scale up quickly based on increased usage of the site. We don't like MYSQL Cluster because, based on our findings, it does not scale well. The No-SQL databases (MongoDB, Couch) are nice, but don't support multi-record atomic transactions. Neo4J appears to be the best of both worlds since it scales and supports transactions. The only things that seems out of place for our use of Neo4j is that our data does not fit the social-graph model in the pure sense, nevertheless, I'm sure Neo4j would still work, but we wanted to get the community's take on our application of it in this scenario. Thank you Raffi ___ 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 ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] web application and neo4j hosting
Thank you very much, however, anyone has experience deploying neo4j app to EC2 and EBS? May be someone could share some thoughts. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154887.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] web application and neo4j hosting
Does neo4j require a shared-disk across all nodes in a cluster? Is that the problem with S3? -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Saturday, July 09, 2011 11:03 AM To: Neo4j user discussions Subject: Re: [Neo4j] web application and neo4j hosting Oops - meant to say S3 doesn't directly allow mounting it *as* a file system. Also, S3 can be used as a backup/snapshot mechanism for EBS volumes. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Saturday, July 09, 2011 10:59 AM To: Neo4j user discussions Subject: Re: [Neo4j] web application and neo4j hosting Simplest difference is that EBS volumes are like storage devices that can be mounted to a running instance and provide file system functionality. S3 is more a general purpose durable storage engine, but doesn't directly allow mounting it is a file system. There are some hacks/3rd party ways to do it, but I'd avoid them for Neo4J usage. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 10:51 AM To: user@lists.neo4j.org Subject: Re: [Neo4j] web application and neo4j hosting Would you mind if I ask this question, what is the difference between S3 and EBS? Thank you. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hostin g-tp3154806p3154841.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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 ___ 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
Re: [Neo4j] web application and neo4j hosting
Can't use S3. Can use EBS. And no, Neo4J doesn't require a shared disk, and in fact, would probably gack if you used one. Each HA instance would have its own synchronized/eventually consistent storage, which could be backed by EBS if needed. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of etc3 Sent: Saturday, July 09, 2011 11:22 AM To: 'Neo4j user discussions' Subject: Re: [Neo4j] web application and neo4j hosting Does neo4j require a shared-disk across all nodes in a cluster? Is that the problem with S3? -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Saturday, July 09, 2011 11:03 AM To: Neo4j user discussions Subject: Re: [Neo4j] web application and neo4j hosting Oops - meant to say S3 doesn't directly allow mounting it *as* a file system. Also, S3 can be used as a backup/snapshot mechanism for EBS volumes. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Saturday, July 09, 2011 10:59 AM To: Neo4j user discussions Subject: Re: [Neo4j] web application and neo4j hosting Simplest difference is that EBS volumes are like storage devices that can be mounted to a running instance and provide file system functionality. S3 is more a general purpose durable storage engine, but doesn't directly allow mounting it is a file system. There are some hacks/3rd party ways to do it, but I'd avoid them for Neo4J usage. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 10:51 AM To: user@lists.neo4j.org Subject: Re: [Neo4j] web application and neo4j hosting Would you mind if I ask this question, what is the difference between S3 and EBS? Thank you. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hostin g-tp3154806p3154841.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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 ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] web application and neo4j hosting
Thanks, I have just subscribed AWS as well.Glad to know that it works. :) -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154926.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] web application and neo4j hosting
We do that today. It works fine. Here's a simple version of what we do: - We created an AMI that contains our app server + app (which embeds neo) - For each instance that we provision on EC2 using that AMI, we create an EBS volume, and mount it to that instance - We use a consistent mounting/naming scheme so that we can point the neo database to use that path Rick -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of noppanit Sent: Saturday, July 09, 2011 11:16 AM To: user@lists.neo4j.org Subject: Re: [Neo4j] web application and neo4j hosting Thank you very much, however, anyone has experience deploying neo4j app to EC2 and EBS? May be someone could share some thoughts. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154887.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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
Re: [Neo4j] Neo4J or MYSQL Cluster
Sure, thanks, of course. I didn't consider it because it is out of his domain ;) Michael mobile mail please excuse brevity and typos Am 09.07.2011 um 16:45 schrieb Agelos Pikoulas agelos.pikou...@gmail.com: Hi to all, Michael, may I also humbly suggest Raffi has a good look at The Spring Data Graph http://www.springsource.org/spring-data/neo4j and the sample cineasts web app https://github.com/jexp/cineasts which show a standard web app, with social-ready capabilities (eg recommendations) build entirely on top of neo4j. With respect A' On Fri, Jul 8, 2011 at 10:24 PM, Michael Hunger michael.hun...@neotechnology.com wrote: Every interconnected data is actually a graph and for an e-comm site you have even more of them. Category trees, price-lines, customer purchases and likes, recommendations, product instances (of basic product types + attribute sets) etc. And much more. We also have experience in team in building java based e-commerce sites (but not based on Neo4j (yet)). There is a simple e-com example using neo4j for product categories on the wiki blog. http://blog.neo4j.org/2010/03/modeling-categories-in-graph-database.html http://wiki.neo4j.org/content/Warehouse Please ping us if you have more questions. Cheers Michael Am 08.07.2011 um 21:15 schrieb etc3: We are planning to build an e-comm site using MySQL as the backend database (Java middle-tier and presentation). The website is basic in terms of e-comm functionality; items, users, orders, etc. are the main entities. We want to plan for the future and ensure that we can scale up quickly based on increased usage of the site. We don't like MYSQL Cluster because, based on our findings, it does not scale well. The No-SQL databases (MongoDB, Couch) are nice, but don't support multi-record atomic transactions. Neo4J appears to be the best of both worlds since it scales and supports transactions. The only things that seems out of place for our use of Neo4j is that our data does not fit the social-graph model in the pure sense, nevertheless, I'm sure Neo4j would still work, but we wanted to get the community's take on our application of it in this scenario. Thank you Raffi ___ 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 ___ 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
Re: [Neo4j] web application and neo4j hosting
We got mixed results for large store aws deployments. EBS performance is a bit flaky and creates high i/o wait load under pressure. That can be alleviated a bit by a raid0 of many ebs volumes. But you can easily test that for your usecase/requirements with a simple aws ec2 setup. There are also preconfigured neo4j AMIs in all regions. Michael mobile mail please excuse brevity and typos Am 09.07.2011 um 17:16 schrieb noppanit noppani...@gmail.com: Thank you very much, however, anyone has experience deploying neo4j app to EC2 and EBS? May be someone could share some thoughts. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/web-application-and-neo4j-hosting-tp3154806p3154887.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ 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
Re: [Neo4j] clean database / unit tests
I tried building it for 1.4M05 and after some fiddling around with maven it seemed to build alright. Copied jar and enabled in the config. Restarted server, and seems to load fine. Trying to use it I get the message WARNING: Deleted DatabaseL as expected, but then I get back code 500 Internal Server Error. Looking at the code that seems to indicate that this line throws an exception: https://github.com/jexp/neo4j-clean-remote-db-addon/blob/master/src/main/java/org/neo4j/server/extension/test/delete/DeleteDatabaseResource.java#L64 Any idea what's going on there? Another peculiar thing: the webadmin interface suggests it did not delete things in the DB, rather it created more nodes, properties and relationships. Highly confusing.. Showing 47 nodes, 126 properties and 31 relationships when there were never that many things there before the /cleandb call. Subsequent calls to /cleandb outputs that nothing is deleted (still returning code 500 though). Leaves me thinking it's the webadmin that is confused rather than that it didn't clean the db. Left confused. On Fri, Jul 8, 2011 at 9:19 PM, Michael Hunger michael.hun...@neotechnology.com wrote: Even then I don't think that left over relationship types do any damage in testing. The addon has a way to delete the database completely but that's only used for large db's (10k nodes). I could make it accessible programmatically. But I don't think it's worth the effort. Cheers Michael Am 08.07.2011 um 22:13 schrieb Mattias Persson: Relationship types are never deleted from a neo4j database. That's because it doesn't track (globally) how many relationships there are of any given type, so deleting a type when there are no more such relationships left isn't possible and pretty much only useful in cases like these, for testing. 2011/7/8 Boris Kizelshteyn bo...@popcha.com I just started using this myself and it's pretty great except that it seems to leave behind the relationship types: curl -v GET http://localhost:7474/db/data/relationship/types I'm on 1.3, any thoughts? Thanks! On Fri, Jul 8, 2011 at 11:56 AM, Patrik Sundberg patrik.sundb...@gmail.comwrote: great, just what i was looking for. thanks On Fri, Jul 8, 2011 at 3:37 PM, Jim Webber j...@neotechnology.com wrote: Hi Patrik, Michael Hunger's add-on is what you need: https://github.com/jexp/neo4j-clean-remote-db-addon I believe it'll be packaged by default with our next release (but totally disabled!). Jim On 8 Jul 2011, at 15:32, Patrik Sundberg wrote: Hi, Is there a good way to ensure I have a clean database? I'm thinking in the context of running some unit tests, I'd like to have some setup/teardown hooks that ensures a clean database for various tests. I'm thinking for a client using the REST API here. I can see how I could write a plugin that is exposed via REST that deletes all nodes and rels, was just wondering if someone has already done this? Thanks, Patrik ___ 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 ___ 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 -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] neo4j unable to lock store
I've got this error from time to time. java.lang.IllegalStateException: Unable to lock store [web-app/WEB-INF/resources/db/neostore], this is usually caused by another Neo4j kernel already running in this JVM for this particular store Is there any way I could prevent this from happening? Thanks a lot. :) -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/neo4j-unable-to-lock-store-tp3155312p3155312.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] neo4j unable to lock store
This only happens in Grails, If I use Java, it runs fine. -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/neo4j-unable-to-lock-store-tp3155312p3155318.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] What to do with Unable to lock store?
If I got this error what should I do with it, does it mean that the database is corrupted? java.lang.IllegalStateException: Unable to lock store [web-app/WEB-INF/resources/db/neostore], this is usually caused by another Neo4j kernel already running in this JVM for this particular store -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/What-to-do-with-Unable-to-lock-store-tp3155717p3155717.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] What to do with Unable to lock store?
Hi! Actually, it occurs when I deploy to Amazon EC2, which I don't have multiple neo4j instances running. BTW, how can I check if there are multiple neo4j instances? -- View this message in context: http://neo4j-user-list.438527.n3.nabble.com/What-to-do-with-Unable-to-lock-store-tp3155717p3155728.html Sent from the Neo4J User List mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] GSoC 2011 Weekly report - OSM data mining and editing capabilities in uDig and Geotools
== Weekly report== Hi all, last week we started the task of adding catalog commands for configuring dynamic layers on OSM datasets. I completed that task, so now from a neo4j catalog in udig, we can list all spatial layers found in a neo4j-spatial database, and we have the complete sets of commands to add/edit/remove dynamic layers from the spatial layers found. It's possible to create new dynamic layer based on a query CQL, or using a comma-separated value=key pairs to add dynamic layers to OSM layers. For the next week the task will be to write a new renderer for the OSM graph model. Code repositories: https://github.com/mircofranzago/neo4j https://github.com/mircofranzago/neo4j-spatial ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
