协议故障数据库的相关内容

阿里云文档 2025-04-28

独享型数据库代理支持故障切换下的连接保持功能

2024年08月01日起，在RDS MySQL数据库代理的2.9.1版本更新中，新增了对故障切换场景下的连接保持功能。降低了数据库连接中断的风险，提升了数据库连接的可靠性。

阿里云文档 2025-04-23

如何使用逻辑复制槽故障转移功能

PolarDB PostgreSQL版（兼容Oracle）的逻辑复制槽故障转移（Logical Replication Slot Failover）功能可以将所有的逻辑复制槽从主节点同步到Standby节点，从而实现逻辑复制槽的故障转移。

阿里云文档 2025-04-23

如何使用逻辑复制槽故障转移功能

PolarDB PostgreSQL版的逻辑复制槽故障转移（Logical Replication Slot Failover）功能可以将所有的逻辑复制槽从主节点同步到Standby节点，从而实现逻辑复制槽的故障转移。

阿里云文档 2025-04-23

数据分片节点故障对请求成功率的影响

假设集群实例的数据分片数量为N，当其中1个数据分片节点发生故障时，该故障节点会启动主备切换，从故障发生至完成切换大约需要几秒到几十秒。在该过程中，访问该数据分片节点的请求均会失败，假设请求分布均匀，理论上该实例会有 1/N 的请求失败率。但存在以下原因，可能导致该过程中实际失败的请求数量高于理论值。...

问答 2022-09-12 来自：开发者社区

通过 Quorum 协议，Aurora 在AZ级别的故障和节点故障的时候，可以保证数据库的可用性和正

通过 Quorum 协议，Aurora 在AZ级别的故障和节点故障的时候，可以保证数据库的可用性和正确性么？

文章 2022-02-16 来自：开发者社区

NoSQL生态系统——一致性RWN协议，向量时钟，gossip协议监测故障

13.5 一致性在NoSQL中，通常有两个层次的一致性：第一种是强一致性，既集群中的所有机器状态同步保持一致。第二种是最终一致性，既可以允许短暂的数据不一致，但数据最终会保持一致。我们先来讲一下，在分布式集群中，为什么最终一致性通常是更合理的选择，然后再来讨论两种一致性的具体实现结节。 13.5.1 关于CAP理论分区容忍性（P）：集群中的某些节点在无法联系后，集群整体是否还能继续进行服务。....

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更新时间 2024-04-30 19:08:56

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