Those are the posts and videos that I consider key to understand Big Data Architectures for Analytics:
Lambda Architecture - A repository dedicated to the Lambda Architecture (LA).
Turning the database inside-out with Apache Samza - Talk about the mutate state and alternatives we have today to create stateless solutions.
Stream Processing, Event Sourcing, Reactive, CEP… And Making Sense of it All - Great article to understand streams and starting to use them in real projects.
The Log: What every software engineer should know about real-time data’s unifying abstraction - Understand the log (not system logging)