1. 环境:CentOS5.5 x84,MySQL5.5.152. 两台机器:master1:192.168.5.143master2:192.168.0.1493. 单独编译安装MySQL,并测试连
10. 测试
实验1:启动两个服务,在任一mysql上进行操作,在另一mysql上均能体现出来。
实验2:启动两个服务,在master1上通过tpcc工具添加20个warehouse,数据占用硬盘约1.9G,,在两台机器上计算count(*),数据一致。
实验3:启动master1,在master1上通过tpcc工具添加一个warehouse,启动master2,同步一段时间后,计算count(*),结果一致。
ps,MySQL的主主复制实际上就是双向的主从复制。

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The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.

The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.

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