Anatomy of an Elasticsearch Cluster: Part I

It's actually kind of terrible. It leaves out a ton of the caveats and detailed information. Once you start using elastic search heavily, the docs are almost useless.

I'm from Insight - our program is kept free for our Fellows because the companies that we partner with pay for the Fellowship. Rather than classes, we believe that the best way for advanced engineers to learn the detailed nuances of these tools is to use them, so the concept is to learn them by building a data platform. You're right that it's really difficult to understand distributed systems in a few weeks, but our Fellows already have several years of programming, so they have been able to pick up a general understanding quite quickly.

Ah! Good catch. I shall update that.