docs: 新增「数据库」章节(MySQL ×4 + Redis ×3,共 7 篇)
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MySQL:
- acid-logs.md          ACID 与三大日志:undo/redo/binlog 分工、WAL、崩溃恢复三阶段、两阶段提交
- transaction-isolation.md  事务隔离级别:三大异常、四级别取舍、RR 幻读破功场景、RC vs RR 选型
- mvcc.md               MVCC 机制:隐藏列与 undo 版本链、Read View 五条可见性规则、快照读 vs 当前读
- btree-index.md        B+ 树索引:为何选 B+ 树、聚簇/二级索引与回表、最左前缀、覆盖索引、ICP、索引失效

Redis:
- persistence.md        RDB / AOF / 混合持久化、AOF 重写本质、与 MySQL binlog/redo log 对比
- sentinel.md           哨兵:主观/客观下线、Leader 选举、故障转移选主、脑裂防护
- cluster.md            集群:16384 哈希槽、MOVED vs ASK、hash tag、去中心化故障转移

- 新增 database/index.md 章节首页与阅读路径
- mkdocs.yml nav 增加「数据库」顶级章节
- cluster.md 中槽位数字经 CRC16-CCITT 实际计算校验
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2026-09-07 19:57:11 +08:00
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@@ -104,6 +104,17 @@ nav:
- 缓存系统设计: project/thumbup/cache-system.md
- 并发控制与数据一致性: project/thumbup/data-consistency.md
- 简历技术要点: project/thumbup/resume.md
- 数据库:
- database/index.md
- MySQL:
- ACID 与三大日志: database/mysql/acid-logs.md
- 事务隔离级别: database/mysql/transaction-isolation.md
- MVCC 机制: database/mysql/mvcc.md
- B+ 树索引与优化: database/mysql/btree-index.md
- Redis:
- 持久化 RDB/AOF/混合: database/redis/persistence.md
- 哨兵机制: database/redis/sentinel.md
- 集群 Cluster: database/redis/cluster.md
- 架构:
- architecture/index.md
- 高并发秒杀系统设计: architecture/seckill-design.md