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在apache cassandra中使用八卦协议有什么用？

[英]what is the use of gossip protocol in apache cassandra?

原文 2015-03-13 18:18:31 4 2 cassandra/ protocols/ communication/ p2p

I have problems understanding the utility of gossip protocol in Apache Cassandra (Why Cassandra use gossip protocol as a P2P communication protocol?)? 我在Apache Cassandra中理解八卦协议的效用时遇到了问题（为什么Cassandra使用gossip协议作为P2P通信协议？）？

Given that Apache cassandra use gossip protocol, for wich reasons? 鉴于Apache cassandra使用八卦协议，原因何在？ is it just to exchange nodes states in cluster to find if a node is UP or DOWN? 只是在群集中交换节点状态以查找节点是UP还是DOWN？ or it's used too to exchange node information like memory usage & disk capacity? 或者它也用于交换内存使用和磁盘容量等节点信息？

2 个解决方案

Gossip is used to broadcast members' state around the cluster. 八卦用于在群集周围广播成员的状态。 Part of the information exchanged: 部分信息交换：

status 状态
health 健康
tokens 令牌
schema version 架构版本
addresses 地址
data size 数据大小

Note: there might be other details that I have missed. 注意：可能还有其他细节我错过了。 Another resource that you can consult is https://wiki.apache.org/cassandra/ArchitectureGossip 您可以参考的另一个资源是https://wiki.apache.org/cassandra/ArchitectureGossip

The Gossip protocol is the internal communication technique for nodes in a cluster to talk to each other. Gossip协议是集群中节点相互通信的内部通信技术。 Gossip is an efficient, lightweight, reliable inter-nodal broadcast protocol for diffusing data. Gossip是一种高效，轻量，可靠的节点间广播协议，用于传播数据。 It's decentralized, "epidemic", fault tolerant and a peer-to-peer communication protocol. 它是分散的，“流行病”，容错和点对点通信协议。 Cassandra uses gossiping for peer discovery and metadata propagation. Cassandra使用闲话进行对等发现和元数据传播。