About Michael Hunger

Posts by Michael Hunger:

 
0

The Story of GraphGen

on Nov 1, 2014 in community, development, neo4j

This is the story behind the really useful and ingenious Neo4j example graph data generator developed by Christophe Willemsen.

I don’t just want to show you the tool but also tell the story how it came to be.

First of all: The Neo4j Community is awesome.
There are so many enthusiastic and creative people, that it is often humbling for me to be part of it.

So October 1st, Christophe tweeted out a short screencast he recorded, about a new tool (NeoGen) he was developing which converted a YAML domain specification into Cypher statements to populate a Neo4j database.

(more…)

 
2

LOAD CSV with SUCCESS

on Oct 18, 2014 in cypher, import, neo4j

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I have to admit that using our LOAD CSV facility is trickier than you and I would expect.
Several people ran into issues that they could not solve on their own.

My first blog post on LOAD CSV is still valid in it own right, and contains important aspects that I [...]

 
2

Flexible Neo4j Batch Import with Groovy

on Oct 9, 2014 in import, neo4j

You might have data as CSV files to create nodes and relationships from in your Neo4j Graph Database.
It might be a lot of data, like many tens of million lines.
Too much for LOAD CSV to handle transactionally.

Usually you can just fire up my batch-importer and prepare node and relationship files that adhere to its input [...]

 
7

LOAD CSV into Neo4j quickly and successfully

on Jun 25, 2014 in cypher, import

Note

You can also read an interactive and live version of this blog post as a Neo4j GraphGist.

Since version 2.1 Neo4j provides out-of-the box support for CSV ingestion. The LOAD CSV command that was added to the Cypher Query language is a versatile and powerful ETL tool.
It allows you to ingest CSV data from any URL [...]

 
2

Rendering a Neo4j Database in UbiGraph

on Jun 23, 2014 in cypher, server

I never heard of UbiGraph before, but this tweet by @a61dr41n made me curious.

#ubigraph is an excellent #visualisation package for #neo4j and other #GraphDB can't believe I haven't heard of it sooner…
— a61dr41n (@a61dr41n) June 20, 2014

So I checked it out. UbiGraph is a graph rendering server that is controlled remotely and also interactively with [...]

 
0

Presentation: “Using AsciiArt to Analyse your SourceCode with Neo4j and OSS Tools” at GeekOut.ee 2014

on Jun 15, 2014 in conference, neo4j, programming languages

During the awesome GeekOut conference organized by my friends at ZeroTurnaround I was asked to stand in for Tim Fox who couldn’t come.

So instead of using a existing presentation I decided to finally write one up over night that covers one aspect of graph databases that is close to my heart:
Software Analytics with Graphs
When I [...]

 
0

Styling Neo4j Server Visualisation

on Jun 3, 2014 in neo4j, server

Styling Neo4j Server Visualisation

To give you a head start when using Neo4j-Browser I wanted to share these quick tips for styling and querying.

 
5

Using LOAD CSV to import Git History into Neo4j

on Jun 1, 2014 in cypher, neo4j

In this blog post, I want to show the power of LOAD CSV, which is much more than just a simple data ingestion clause for Neo4j’s Cypher.
I want to demonstrate how easy it is to use by importing a project’s git commit history into Neo4j. For demonstration purposes, I use Neo4j’s repository on GitHub, which [...]

 
1

Importing Forests into Neo4j

on Apr 10, 2014 in cypher, neo4j

Sometimes you don’t see the forest for the trees. But if you do, you probably use a graph database.

Trees are one of the simple graph datastructures, directed acyclic graphs (DAGs).

For our example we use a time-tree that we want to import into the database.

Data Volume

A quick soulver script (thanks Mark) later, we know how [...]

 
1

Sampling A Neo4j Database

on Mar 25, 2014 in cypher, neo4j

After reading the interesting blog post of my colleague Rik van Bruggen on “Media, Politics and Graphs” I thought it would be really cool to render it as a GrapGist. Especially, as he already shared all the queries as a GitHub Gist.

Unfortunately the dataset was a bit large for a sensible GraphGist representation, so I [...]

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