MySQL金融级数据一致性保障：从原理到实战
1. 金融级数据一致性挑战
graph TDA[金融业务需求] --> B[强一致性]A --> C[高可用性]A --> D[高性能]B --> E[ACID保障]C --> F[故障自动恢复]D --> G[低延迟响应]classDef challenge fill:#f96,stroke:#333;class B,C,D challenge;
2. 事务隔离级别深度解析
2.1 隔离级别对比测试
-- 测试准备CREATE TABLE account ( id INT PRIMARY KEY, balance DECIMAL(10,2), version INT) ENGINE=InnoDB;INSERT INTO account VALUES (1, 1000.00, 0), (2, 2000.00, 0);-- 测试1：脏读验证SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;START TRANSACTION;-- 会话A更新但不提交UPDATE account SET balance = balance - 100 WHERE id = 1;-- 会话B可看到未提交数据SELECT * FROM account WHERE id = 1;-- 测试2：可重复读验证SET TRANSACTION ISOLATION LEVEL REPEATA
