Raft 为什么是更易理解的分布式一致性算法



Raft 为什么是更易理解的分布式一致性算法

拜占庭位于如今的土耳其的伊斯坦布尔,是东罗马帝国的首都。由于当时拜占庭罗马帝国国土辽阔,为了防御目的,因此每个军队都分隔很远,将军与将军之间只能靠信差传消息。在战争的时候,拜占庭军队内所有将军必需达成 **一致的共识**,决定是否有赢的机会才去攻打敌人的阵营。但是,在军队内有可能存有叛徒和敌军的间谍,左右将军们的决定又扰乱整体军队的秩序,在进行共识时,结果并不代表大多数人的意见。这时候,在已知有成员不可靠的情况下,其余忠诚的将军在不受叛徒或间谍的影响下如何达成一致的协议,拜占庭问题就此形成。拜占庭假设是对现实世界的模型化,由于硬件错误、网络拥塞或断开以及遭到恶意攻击,计算机和网络可能出现不可预料的行为。


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