Replicated State Machine via Consensus
Explore how consensus algorithms such as Paxos help build replicated state machines by ensuring all nodes receive and execute commands in the same order. Understand how this approach maintains distributed system reliability while presenting a simple programming model to users.
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At the beginning of this chapter, we briefly described how a consensus algorithm could be used to solve a wide variety of problems.
This is not a coincidence since all these problems share a common, fundamental characteristic. This is the fact that they can all be modeled as a state machine to some extent. This is also the reason why it’s easier to solve them in a centralized setting, but it gets much harder when we want to solve them in a distributed setting in order to increase availability.
Building a replicated state machine using a consensus algorithm
Using a consensus ...