NoSQL matters Conference in Cologne, Germany 2013 - Creating Neo4j Graph Databases with Hadoop by Kris Geusebroek - http://2013.nosql-matters.org/cgn/
When exploring very large raw datasets containing massive interconnected networks, it is sometimes helpful to extract your data, or a subset thereof, into a graph database like Neo4j. This allows you to easily explore and visualize networked data to discover meaningful patterns. When your graph has 100M+ nodes and 1000M+ edges, using the regular Neo4j import tools will make the import very time-intensive (as in many hours to days).
In this talk, I'll show you how we used Hadoop to scale the creation of very large Neo4j databases by distributing the load across a cluster and how we solved problems like creating sequential row ids and position-dependent records using a distributed framework like Hadoop.
Slides are available: http://2013.nosql-matters.org/cgn/wp-content/uploads/2013/05/TheMakingOfNeo4JDbWithHadoop.pdf
