Monthly Archives: February 2014

Feb 27 2014
6 Comments
Deployment, Java, Problems

Neo4j at Ludicrous Speed

spaceballs_ludicrous_speed

In the last blog post we saw how we could get about 1,250 requests per second (with a 10ms latency) using an Unmanaged Extension running inside the Neo4j server… but what if we wanted to go faster?

The easy answer is to Scale Up. However, trying to add more cores to my Apple laptop doesn’t sound like a good time. Another answer is running a Neo4j Cluster and (almost) linearly scaling our read requests as we add more servers. So a 3 server cluster would give us between 3,500 and 3,750 requests per second.

But can we go faster on a single server without new hardware? Well… yes.
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Feb 12 2014
8 Comments
Java, Problems, Random

Online Payment Risk Management with Neo4j

credit_cards_512

I really like this saying by Corey Lanum:

Finding the relationships that should not be there is a great use case for Neo4j, and today I want to highlight an example of why. When you purchase something online, the merchant hands off your information to the payment gateway which processes your actual payment. Before they accept the transaction, they run it via series of risk management tests to validate that it is a real transaction and protect themselves from fraud. One of the hardest things for SQL based systems to do is cross check the incoming payment information against existing data looking for relationships that shouldn’t be there.
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Feb 11 2014
5 Comments
Cypher, Problems, Spatial

Neo4j Spatial Part 2

nomnomnom

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 “Nom Nom Nom” in reference to its onomatopoeic meme.

So we’ll get data from Factual, get data from OpenTable, combine them and import them into Neo4j:

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