Replication Internals: Fitting Everything Together
Replication in MongoDB requires deep integration with almost every part of the codebase, and has important hooks in various systems like storage, indexing, command processing and querying. Most of the replication components have seen a major overhaul recently in order to make further improvements. In this talk we will address what those pieces are, how they interact, and interesting choices made during their design. In this talk we get into the interaction of the replication protocols, commands really, writes and write concern enforcement, consensus (elections/ leader/follower/ majority) behaviors, and down into the depths of oplog generation and application on replicas. While a large part of the talk will be a technical overview of the big pieces we will dive into many important areas in order to ensure better understanding. The audience will be able to greatly affect which areas we focus on during the session, so come with ideas and a focus.
