SSD在淘宝的应用实践

大话 SSD 淘宝核心系统数据库组褚霸 http://yufeng.info 2011/06/25

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object]

存储设备 IOPS 演变史设备 IOPS 接口 7200 RPM SATA drives ~90 IOPS SATA II 15k RPM SCSI drives ~180 IOPS SAS Intel X25-M G2 (MLC) ~8,600 IOPS SATA II ioDrive, a PCI-Express card with Flash with Flash 140,000 Read IOPS, 135,000 Write IOPS PCIe Fusion-io ioDrive Octal 1,180,000+ Random Read/Write IOPS PCIe

存储设备价格对照设备价格 / 每 GB SATA 7200 转 0.1 USD SAS 10000 转 0.4 USD Intel X25-M 160G * USD FusionIO iodrive MLC 320G * USD Virident tachion SLC 400G * USD

淘宝使用案例 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Agenda ,[object Object],[object Object],[object Object],[object Object]

SSD 写入如何发生的呢？

背景知识 1 ： Nand 芯片擦写次数 Generation SLC MLC eMLC 2x 100,000 2,500 3x 100,000 5,000 35,000 5x 100,000 10,000

背景知识 2 ：写放大倍数 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

垃圾收集导致 IO 性能下降

适用环境 ,[object Object],[object Object],[object Object],[object Object],[object Object]

对程序员的影响 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

对程序员的影响（续） ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

使用 SSD 通常要考虑的问题

选择 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

离散读性能 / 线程数目

离散写性能 / 线程数目

写放大倍数和寿命 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

数据安全性 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

驱动对应用的影响 ,[object Object],[object Object],[object Object],[object Object]

抖动和延迟 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SSD 作为 L2Cache 方案 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

交流时间 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SSD在淘宝的应用实践

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