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The Rules of Scalable database
- 1. The Rules of Scalable Database 4 Web Site Fenng@dxy.com Wednesday, October 31, 12
- 2. No PL/SQL • 剥离业务逻辑 ( B/S vs. C/S ) • SPOF Wednesday, October 31, 12
- 3. SQL • 更⼩小的执⾏行成本(Cost) • 更少的执⾏行频率 • 更稳定的执⾏行计划 Wednesday, October 31, 12
- 4. Benchmark • 端到端的基准测试 (Benchmark) • SQL Trace / Tkprof /10046... not enough Wednesday, October 31, 12
- 5. DB 不是消息系统 • 消息队列持久化 • 应⽤用场景 RDBMS vs NoSQL(MongoDB) Wednesday, October 31, 12
- 6. 存储合适的内容 • RDBMS 是 RDBMS • 选择合适的字段、数据类型 • 尽量避免操作 Blob 字段 Wednesday, October 31, 12
- 7. 反范式设计 • 适当反范式 严格遵守 3NF 是缘⽉⽊木求⻥鱼 • 是否有⾜足够的设计能⼒力，看有多⼤大的能 ⼒力做反范式设计 • 拥抱冗余，做好 Meta 数据管理 Wednesday, October 31, 12
- 8. 分区 • 合理利⽤用分区(Partition) 分区解决的问题 全局索引与可维护性 • Partition 与性能 Wednesday, October 31, 12
- 9. Sharding • ⽔水平 vs. 垂直分⽚片 • 分布式事务: No Oracle XA • Oracle 0; MySQL +1; PostgreSQL +2 Wednesday, October 31, 12
- 10. 新特性 • 作为伪技术的那些特性(Cursor_Sharing) • 试验性质的新特性 • 杀⼿手级特性 Wednesday, October 31, 12
- 11. IOPS • Tape is Dead • Disk is Tape • Flash is Disk 固态盘（SSD）与 PCI-E Flash，与 Flash Storage 以及使⽤用 Flash 作为 Cache 的各种可能 • RAM Locality is King Wednesday, October 31, 12
- 12. MAA • Maximum Availability Architecture • Data Guard 最佳实践 Wednesday, October 31, 12
- 13. Scalable People • 业务能⼒力扩展 • 技术能⼒力扩展 Wednesday, October 31, 12
- 16. Q/A Wednesday, October 31, 12