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Pathfinding with Neo4j Unmanaged Extensions
In Extending Neo4j I showed you how to create an unmanaged extension to warm up the node and relationship caches. Let’s try doing something more interesting like exposing the A* (A Star) search...
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Setting up a Neo4j Cluster on Amazon
There are multiple ways to setup a Neo4j Cluster on Amazon Web Services (AWS) and I want to show you one way to do it. Overview: Create a VPC Launch 1 Instance Install Neo4j HA Clone 2 Instances...
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Facebook Graph Search with Cypher and Neo4j
Facebook Graph Search has given the Graph Database community a simpler way to explain what it is we do and why it matters. I wanted to drive the point home by building a proof of concept of how you...
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Neo4j and Gatling sitting in a tree, Performance T-E-S-T-ing
I was introduced to the open-source performance testing tool Gatling a few months ago by Dustin Barnes and fell in love with it. It has an easy to use DSL, and even though I don’t know a lick of...
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A Peek behind the Neo4j Lucene Index Curtain
Did you know you can write Javascript in the Neo4j console to access the Neo4j API? Try it. Open up your Neo4j Web Admin Console and type: neo4j-sh (0)$ eval db EmbeddedGraphDatabase [data/graph.db]...
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Permission Resolution with Neo4j – Part 1
People produce a lot of content. Messages, text files, spreadsheets, presentations, reports, financials, etc, the list goes on. Usually organizations want to have a repository of all this content...
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Permission Resolution with Neo4j – Part 2
Let’s try tackling something a little bigger. In Part 1 we created a small graph to test our permission resolution graph algorithm and it worked like a charm on our dozen or so nodes and edges. I...
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Permission Resolution with Neo4j – Part 3
Let’s add a couple of performance tests to the mix. We learned about Gatling in a previous blog post, we’re going to use it here again. The first test will randomly choose users and documents (from...
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Knowledge Bases in Neo4j
From the second we are born we are collecting a wealth of knowledge about the world. This knowledge is accumulated and interrelated inside our brains and it represents what we know. If we could export...
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Visualizing the news with Vivagraph.js
Today I want to introduce you to VivaGraphJS – a JavaScript Graph Drawing Library made by Andrei Kashcha of Yasiv. It supports rendering graphs using WebGL, SVG or CSS formats and currently supports a...
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Neo4j 2.0 is coming
House Neo4j of Graph Databases is one of the Great Houses of NOSQL and the principal noble house of The Graph; many lesser houses are sworn to them. In days of old they ruled as Kings of the Graph;...
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The Last Mile
The “last mile” is a term used in the telecommunications industry that refers to delivering connectivity to the customers that will actually be using the system. In the sense of Graph Databases, it...
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Connected
Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives is a mind bending look at how no matter how individual we think we are, the people around us have a great amount of...
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Scaling Writes
Most of the applications using Neo4j are read heavy and scale by getting more powerful servers or adding additional instances to the HA cluster. Writes however can be a little bit tricker. Before...
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Translating Cypher to Java
The expressive power of Cypher is already awesome and getting better with the Neo4j 2.0 release. Let’s take a step back from the bleeding edge and see Cypher in 1.9.4 and how it can be translated into...
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Scaling Up
Rock climbing is a physically and mentally demanding sport, it test the limits of one’s strength, endurance, agility, balance and concentration. Sasha DiGiulian is one of the best rock climbers in the...
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The Power of Open Source Software
One of the benefits of Open Source Software is that if you want to change how something is done, you can. At Neo Technology, we have a small team of “Field Engineers” who don’t really work ON the...
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Neo4j Spatial Part 1
One of my new year resolutions is to do a project with Neo4j Spatial, so we’ll kick off my first blog post of the year with a gentle introduction to this awesome plugin. I advise you to watch this...
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Neo4j Spatial Part 2
In part 1 of this series we looked at how to get started with Neo4j Spatial and we looked at some of the pieces we’ll use today to build a proof of concept application. I’m calling the application...
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Online Payment Risk Management with Neo4j
I really like this saying by Corey Lanum: "Almost all fraud cases involve the fabrication of a relationship, so… model your data to highlight relationships" — @corey_lanum— Max De Marzi (@maxdemarzi)...
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