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

[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,

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

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

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

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

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.

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

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

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

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

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

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

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:

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.

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

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

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

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

[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?

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] 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

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:

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