大话存储后传：次世代数据存储思维与技术

    文中观点凸显瓜兄行业知识的广博，有见地、不附和。读来，时有让人拍案叫绝之感，又常有与瓜兄把酒论江湖的豪情。这并不是一本产品介绍大全，而是一部走心的佳作，更是一部情怀之作。

    ——美国飞康软件公司亚太区总经理 杨政

    如此纷繁的存储技术，被冬瓜哥描述得如此锋芒闪烁。“大话”更接地气，“存储”之树长青，“后传”流露精彩。

    ——北京华云网际科技有限公司创始人 董事长 游峰

    《大话存储后传》是一本承上启下的书，它可以帮助存储开发者和存储使用者深刻理解存储技术的点点滴谪和变化过程。

    ——达沃时代CTO 雷迎春

    本书是一本可用于企业实际业务的工具书和参考书，该书真正称得上“专业”二字。

    ——同有科技 产品中心总经理 仇悦

    有幸从冬瓜那里拿到一手资料，阅后感触良多，冬瓜的基础之扎实，思维之清晰、对新技术把握之精准令人叹服！这必然又是一本存储行业里程碑式巨作。

    ——北京创意云智数据技术有限公司联合创始人 李辉

    如今，存储技术领域热点纷呈，在这个让人看不清方向和看不全细书的时代，这次的《大话存储后传》，无疑又是一座里程碑。冬瓜哥的与时俱进，鞠躬尽瘁，情怀与坚持，同样值得学习。

    ——浪潮存储研发总监 李辉

    冬瓜哥通过多年在业内端到端的经验积累，为我们精雕细琢了《大话存赭》系列书籍，它完全可以解决我们在存储选型和研发设计中“跟着宣传走”的问题。这是一套值得新手老鸟都收藏的存储工具书！

    ——天玑科技董事副总经理 天玑数据总经理 叶磊

    在技术和概念的背后，在更深的层次，我们强烈需要了解更底层的技术支撑，才能看清楚眼前的缭乱现状。《大话存储后传》就是这样一本能够让人穿越迷雾找到本质的不可多得的书籍。

    ——戴尔存储大中华区总经理 李海平

    全书分为：灵活的数据布局、应用感知及可视化存储智能、存储类芯片、储海钩沉、集群和多控制器、传统存储系统、新兴存储系统、大话光存储系统、体系结构、I/O协议栈及性能分析、存储软件、固态存储等，其中每章又有多个小节。每一个小节都是一个独立的课题。本书秉承作者一贯的写作风格，完全从读者角度来创作本书，语言优美深刻，包罗万象。另外，不仅阐释了存储技术，而且同时也加入了计算机系统技术和网格技术的一些解读，使读者大开眼界，茅塞顿开，激发读者的阅读兴趣。
本书适合存储领域所有从业人员阅读研习，同时可以作为《大话存储终极版》的读者的延伸高新资源。

    冬瓜哥（张冬），现任某半导体公司系统架构师，著有《大话存储》系列图书。存储领域技术专家和布道者。

目 录

第一章 灵活的数据布局 ·········································································1

1.1 Raid1.0和Raid1.5 ······························································································2

1.2 Raid5EE和Raid2.0 ·····························································································4

1.3 Lun2.0/SmartMotion ························································································13

第二章 应用感知及可视化存储智能 ·····················································23

2.1 应用感知精细化自动存储分层······································································25

2.2 应用感知精细化SmartMotion ········································································27

2.3 应用感知精细化QoS ······················································································28

2.4 产品化及可视化展现······················································································31

2.5 包装概念制作PPT ···························································································43

2.6 评浪潮“活性”存储概念··············································································49

第三章 存储类芯片 ··············································································53

3.1 通道及Raid控制器架构 ··················································································54

3.2 SAS Expander架构 ··························································································60

第四章 储海钩沉 ··················································································65

4.1 你绝对想不到的两种高格调存储器······························································66

4.2 JBOD里都有什么····························································································70



4.3 Raid4校验盘之殇 ····························································································72
4.4 为什么说Raid卡是台小电脑 ··········································································73
4.5 为什么Raid卡电池被换为超级电容 ······························································74
4.6 固件和微码到底什么区别··············································································75
4.7 FC成环器内部真的是个环吗 ·········································································76
4.8 为什么说SAS、FC对CPU耗费比TCPIP 以太网低 ····································77
4.9 双控存储之间的心跳线都跑了哪些流量······················································78
第五章集群和多控制器 ······································································· 79

5.1 浅谈双活和多路径··························································································80
5.2 “浅”谈容灾和双活数据中心（上）··························································82
5.3 “浅”谈容灾和双活数据中心（下）··························································87
5.4 集群文件系统架构演变深度梳理图解··························································96
5.5 从多控缓存管理到集群锁············································································107
5.6 共享式与分布式各论····················································································115
5.7 “冬瓜哥画PPT”双活是个坑 ·····································································118
第六章传统存储系统 ········································································· 121

6.1 与存储系统相关的一些基本话题分享························································122
6.2 高端存储系统江湖风云录！········································································133
6.3 惊了！原来高端存储架构是这样演进的！················································145
6.4 传统高端存储系统把数据缓存集中外置一石三鸟····································155
6.5 传统外置存储已近黄昏················································································156
6.6 存储圈老炮大战小鲜肉················································································166
6.7 传统存储老矣，新兴存储能当大任否····················································167
第七章次世代存储系统 ····································································· 185

7.1 一杆老枪照玩次世代存储系统····································································187
7.2 最有传统存储格调的次世代存储系统························································192
7.3 最适合大规模数据中心的次世代存储系统················································203
7.4 最高性能的次世代存储系统········································································206
7.5 最具备感知应用能力的次世代存储系统····················································214
7.6 最具有数据管理灵活性的次时代存储系统················································225

第八章光存储系统············································································ 237

8.1 光存储基本原理····························································································238
8.2 神秘的激光头及蓝光技术············································································244
8.3 剖析蓝光存储系统························································································249
8.4 光存储系统生态····························································································253
8.5 站在未来看现在····························································································259
第九章体系结构 ················································································ 263

9.1 大话众核心处理器体系结构········································································264
9.2 致敬龙芯！冬瓜哥手工设计了一个CPU译码器！ ····································271
9.3 NUNA体系结构首次落地InCloudRack机柜 ···············································274
9.4 评宏杉科技的CloudSAN架构 ······································································278
9.5 内存竟然还能这么玩！············································································283
9.6 PCIe交换，什么鬼····················································································293
9.7 聊聊FPGA/GPCPU/PCIe/Cache-Coherency ················································300
9.8 【科普】超算到底是怎样算的································································305
第十章 I/O 协议栈及性能分析 ···························································· 317

10.1 最完整的存储系统接口/协议/连接方式总结 ···········································318
10.2 I/O协议栈前沿技术研究动态 ····································································332
10.3 Raid组的Stripe Size到底设置为多少合适 ·············································344
10.4 并发I/O——系统性能的根本！ ································································347
10.5 关于I/O时延你被骗了多久 ····································································349
10.6 如何测得整条I/O路径上的并发度 ························································351
10.7 队列深度、时延、并发度、吞吐量的关系到底是什么··························351
10.8 为什么Raid对于某些场景没有任何提速作用 ······································365
10.9 为什么测试时性能出色，上线时却惨不忍睹······································366
10.10 队列深度过浅有什么影响····································································368
10.11 队列深度调节为多大最理想 ································································369
10.12 机械盘的随机I/O平均时延为什么有一过性降低 ······························370
10.13 数据布局到底是怎么影响性能的························································371
10.14 关于同步I/O与阻塞I/O的误解 ·································································374
10.15 原子写，什么鬼！················································································375

10.16 何不做个USB Target ·············································································385
10.17 冬瓜哥的一项新存储技术专利已正式通过············································385
10.18 小梳理一下iSCSI底层 ··············································································394
10.19 FC的4次Login过程简析 ···········································································396
第十一章存储软件············································································ 397

11.1 Thin就是个坑谁用谁找抽！······································································398
11.2 存储系统OS变迁 ·························································································400
第十二章固态存储············································································ 409

12.1 浅析固态介质在存储系统中的应用方式··················································410
12.2 关于SSD元数据及掉电保护的误解··························································420
12.3 关于闪存FTL的Host Base和Device Based的误解 ····································421
12.4 关于SSD HMB与CMB ···············································································423
12.5 同有科技展翅归来······················································································424
12.6 和老唐说相声之SSD性能测试之“玉”··················································435
12.7 固态盘到底该怎么做Raid ······································································441
12.8 当Raid2.0遇上全固态存储 ·········································································448
12.9 上/下页、快/慢页、MSB/LSB都些什么鬼 ··········································451
12.10 关于对MSB/LSB写0时的步骤 ·································································457