Patterns of Distributed Systems

Chapter 2

Overview of the Patterns

by Unmesh Joshi and Martin Fowler

As discussed in the last chapter, distributing data means at least one of two things: partitioning and replication. To start our journey through the patterns in this book, we’ll focus on replication first.

Imagine a very minimal data record that captures how many widgets we have in four locations (Figure 2.1).

Figure 2.1 An example data record

We replicate it on three nodes: Jupiter, Saturn, and Neptune (Figure 2.2).

Figure 2.2 Replicated data record

Keeping Data Resilient ...