Neo4j is a graph database, reliable and fast for managing and querying highly connected data.

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1answer
28 views

Neo4j service won't start with an imported database on Debian

I've been playing around with neo4j recently on my Debian 7.8 install. It's awesome! Today I imported around 100000 nodes and 75000 relationships using neo4j-import tool. I stopped the neo4j service ...
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14 views

Does an Object literal always mean the Predicate and Object form a key-value property on the Subject?

A triple is Subject-Predicate-Object, e.g. Post Office - Not Open - Sunday. Consider another example, Post Office - Size in Square Feet - "4000" For this example, I have two observations: the ...
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26 views

In face of a network partition (P), does Neo4J HA allow read stale data?

In Neo4j docs it says that it is partition tolerant, but in further descriptions their docs does not make clear what happens if a network partition occurs. It enables a fault-tolerant database ...
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1answer
231 views

new Neo4j install: “No authorization header supplied” even after editing config file

I just installed Neo4j today to play around on my Ubuntu EC2 instance, and I'm having two problems. First, the ubuntu install did not create a neo4j command so I'm not able to issue commands from the ...
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2answers
128 views

Is Neo4j 2 replication architecture a master-slave or multi-master?

In the new docs of Neo4j (23.1. Architecture) it says that: When running Neo4j in HA mode there is always a single master and zero or more slaves. Compared to other master-slave replication ...
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1answer
106 views

Use Database to Store Data Extracted From Internet

I'm mining 500 million users, and their "followers" from a social network using their API. The extraction of data itself is not a problem, since I can do it with my scripts. However having 500 million ...
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80 views

How can I model this problem in a graph database?

I have a project that I'm working on where I extract data from PDFs and map/visualize the relationships between the extracted pieces. Here's an example of my problem: file: 11425646.pdf author: ...
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1answer
524 views

How to perform ETL from RDBMS to Neo4j

I have a mature 50+ tables web application based on mySQL. In order to do some advanced data mining I want to use Neo4j and the goodnes of cypher. However I'm having a hard time migrating my data from ...
3
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1answer
497 views

What happens if we copy neo4j's data folder while the server is running?

If my neo4j server is running and I copy the data folder using copy/rsync folder, what are the chances of data corruption?
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1answer
2k views

Amount of data per node in Neo4j

I need to store substantial amounts of data per node in Neo4j. The data is Unicode chunks of text. Actually not every node will have big chunks, but many of them will. I waded through the ...