理解Raft日志||Paxos

最新推荐文章于 2025-05-15 17:51:16 发布

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本文深入解析Raft算法，它作为易于理解的分布式一致性解决方案，对比Paxos在容错性和性能上的相似之处，特别强调其分解问题的特性与实现实用系统的要素。同时介绍了共识在分布式系统中的核心作用，以及Statemachine Replication在分布式计算中的应用。

The Raft Consensus Algorithm

Raft is a consensus algorithm that is designed to be easy to understand.

It’s equivalent to Paxos in fault-tolerance and performance. The difference is that it’s decomposed into relatively independent subproblems, and it cleanly addresses all major pieces needed for practical systems.
What is consensus?

Consensus is a fundamental problem in fault-tolerant distributed systems.

Consensus involves multiple servers agreeing on values. Once they reach a decision on a value, that decision is final. Typical consensus algorithms make progress when any majority of their servers is avaiable.

Consesus protocols are the basis for the state machine replication approach to distributed computing.
Paxos

Paxos is a family of protocols for solving consensus in a network of unreliable or fallible processors.
State machine replication

State machine replication or state machine approach is a general method for implementing a fault-tolerant service by replicating servers and coordinating client interactions with server replicas.
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