In this chapter, we took a peek into the working of Neo4j under the hood, though not in detail, but enough to give you a start to explore the source yourself. You learned how the core classes for storage, the caching mechanism, and the transactions, worked. We also explored the high availability cluster operations and the master election mechanism.

In the next chapter we will take a look at a few useful tools that are built for and around Neo4j to ease the life of users and admins and look into relevant use cases for the same.