数据库高可用性终极指南
原文英文，约6100词，阅读约需23分钟。发表于：。To make data count and to ensure cloud computing is unabated, companies and organizations must have highly available databases. That doesn’t mean downtime is nonexistent, but it must be limited so...
本文介绍了MySQL、PostgreSQL和MongoDB的高可用性方案和最佳实践，Percona提供技术支持。高可用性通过冗余、负载均衡、故障检测、故障转移和没有单点故障等元素实现。99.99%可用性意味着数据库每年停机不超过52.60分钟，而99.999%可用性意味着数据库每年停机不超过5.26分钟。
