Pro Oracle Database 11g RAC on Linux

出版者:Apress

作者:Steve Shaw, Martin Bach, Julian Dyke

页数:840

出版时间:2010

价格:$41.99

isbn号码:9781430229582

具体描述

Pro Oracle Database 11g RAC on Linux provides full-life-cycle guidance on implementing Oracle Real Application Clusters in a Linux environment. Real Application Clusters, commonly abbreviated as RAC, is Oracle’s industry-leading architecture for scalable and fault-tolerant databases. RAC allows you to scale up and down by simply adding and subtracting inexpensive Linux servers. Redundancy provided by those multiple, inexpensive servers is the basis for the failover and other fault-tolerance features that RAC provides.

Written by authors well-known for their talent with RAC, Pro Oracle Database 11g RAC on Linux gives you a rock-solid and technically flawless foundation on which to build your RAC-management skills. Authors Julian Dyke and Steve Shaw share their hard-won experience in building RAC clusters, showing you how to build for success using the very latest Oracle technologies, such as Automatic Storage Management (ASM) and Oracle Clusterware. You’ll learn to troubleshoot performance and other problems. You’ll even learn how to correctly deploy RAC in a virtual-machine environment based upon Oracle VM, which is the only virtualization solution supported by Oracle Corporation.

RAC is a complex and powerful technology. It demands expertise in its deployment. You can’t just “wing it” in creating a RAC solution. Julian and Steve have earned the right to term themselves expert—in Pro Oracle Database 11g RAC on Linux, they offer a rigorous and technically-correct treatment of RAC that helps you build a solid foundation of expertise and achieve success.

•Rigorous and technically accurate content

•Complete coverage of RAC, from planning to implementation to rollout to ongoing maintenance and troubleshooting

•Up-to-date with the very latest RAC features

What you’ll learn

•Plan the architecture for a successful RAC installation

•Implement failover and other fault-tolerant features

•Scale RAC clusters up and down as needed to achieve performance targets

•Consolidate RAC clusters using Oracle’s virtualization solution

•Manage RAC proactively so as to sleep well at night

•Troubleshoot and solve performance and availability problems

Who this book is for

Pro Oracle Database 11g RAC on Linux is written for Oracle Database Administrators who want to step up their skills to be equal to the task of managing Real Application Clusters.

作者简介

Julian Dyke

Julian Dyke is an independent consultant specializing in Oracle Database technology. He has over 20 years of database experience, including more than 15 years as an Oracle DBA, developer, and consultant. He is chair of the UK Oracle User Group Real Application Clusters Special Interest Group (UKOUG RAC SIG) and a member of the Oak Table Network. He regularly presents at conferences, seminars, and usergroup meetings in the UK, Europe, and the US. He also maintains www.juliandyke.com, which specializes in Oracle diagnostics, optimization, and internals. He is an Oracle Certified Professional and holds a bachelor of science degree in computation from the University of Manchester Institute of Science and Technology (UMIST), UK.

Martin Bach

Martin Bach started working with the Oracle RDBMS in 2001. His main interests are high availability and disaster recovery solutions for mission critical 24×7 systems, for which he possess a wealth of experience. Martin has also spent many years explorincg the benefits of virtualisation technologies for Oracle products, mainly by using VMWare ESX Server and Oracle VM.

Martin is a proud member of the Oracle Certified Master community, having successfully passed the exam for Database 10g Release 2 in December 2008. He has contributed to various Oracle user group publications and runs a successful web log. Martin likes to share his knowledge with the Oracle user community in form of presentations, such as at UK Oracle User Group events.

Martin has a degree in business and computer science from the University of Applied Sciences in Trier, Germany.

Steve Shaw

Steve Shaw is the lead Oracle technologist for Intel Corporation in EMEA (Europe, the Middle East, and Africa). Steve has over 12 years of commercial IT experience with 8 years dedicated to working with the Oracle Database, including a period of time with Oracle Corporation. Steve is the author of Hammerora, the open source Oracle load-test tool, and an expert on Oracle benchmarks and performance. Steve has contributed articles to many Oracle publications and web sites and presents regularly at Oracle seminars, conferences, and special-interest group meetings. He is an Oracle Certified Professional and holds a master of science degree in computing from the University of Bradford, UK.

用户评价

这本书的价值，主要体现在它对“Linux环境下的企业级实践”这一主题的深度聚焦上。在许多教材中，RAC的部署往往被简化为一系列标准化的步骤，但这本书的作者显然经历过真实的生产环境的洗礼。我印象最深的是其中关于操作系统内核参数调优的部分，作者详细列举了哪些sysctl参数会直接影响到Interconnect（节点间通信）的网络性能和UDP广播的可靠性，并给出了基于实际负载测试得出的推荐值范围。这在其他任何官方文档或者第三方教程中都是很难找到如此细致的“黑魔法”。而且，它对Oracle Real Application Clusters（RAC）的并发访问控制模型分析得非常到位，特别是对锁机制的剖析，帮助我理解了为什么在高并发场景下，某些事务会莫名其妙地出现等待事件。总的来说，这本书提供了一种将Oracle的逻辑视图与Linux的物理资源视图完美结合的思考框架，让管理员能够真正地从操作系统层面去优化数据库集群，这是一种质的飞跃。

这本书对于构建一个高可用、高性能的数据库集群的“哲学”探讨，远超出了单纯的技术手册范畴。它不是那种教你敲击命令的速成宝典，而是一本教你理解分布式事务一致性难题的教科书。我尤其欣赏作者在介绍故障切换（Failover）机制时，所采用的对比分析法——将“硬切换”和“软切换”的成本效益进行了量化评估。通过这本书，我明白了在设计数据库架构时，技术选型往往是在“性能最大化”和“可用性冗余”之间做出的复杂权衡。它引导读者思考：在某个特定业务场景下，我们究竟能容忍多长的服务中断时间，并据此来调整我们的存储层级和节点间网络带宽的预算。这种自上而下的设计思维训练，比单纯学习如何安装软件要宝贵得多。对于那些需要向管理层汇报技术选型决策的架构师而言，这本书提供的论据和数据支持，是极具说服力的。

老实说，我刚开始对这本书抱有很大期望，毕竟是11g时代的主流技术参考书，但阅读体验上，我感受到了浓厚的“实战派”风格，这对于初学者来说可能略显陡峭。我花了大量时间在理解其关于ASM（Automatic Storage Management）的底层工作原理上。书中对磁盘组的条带化、冗余级别选择的数学模型进行了深入探讨，这部分内容阅读起来需要极高的专注力，因为它不仅仅是告诉你“怎么做”，而是深入解释了“为什么这么做效率最高”。我特别欣赏它在性能调优章节中引入的基于I/O延迟的诊断方法，而不是简单地依赖AWR报告。作者似乎默认读者已经对Linux系统管理有基本的了解，所以对一些基础的shell脚本命令和文件系统操作一带而过，直接切入Oracle的私有领域。这本书更像是一本“工具箱”，而不是一本“入门指南”。如果你是那种喜欢拆解机器螺丝钉，看看里面齿轮是如何咬合的技术人员，你会爱上它对底层细节的挖掘，但如果只是想快速搭建一个测试环境，可能需要配合其他更偏向快速部署的资料。

这本书简直是为我这种深度技术爱好者量身定做的“武功秘籍”！我一拿到手，就被它那厚重的分量和扎实的排版镇住了。我本来就是Oracle资深用户，日常工作离不开RAC架构的部署和调优，但总觉得在Linux环境下对底层内核参数和存储同步机制的理解还不够透彻。这本书简直是把RAC的每一个组件——从Clusterware的安装部署到Grid Infrastructure的精细化配置，再到实际的性能监控和故障排查——都用极其详尽的图文和代码示例扒了个底朝天。特别是关于高可用性策略的对比分析部分，作者显然是下了大功夫的，不同于市面上那些蜻蜓点水的介绍，这里详细阐述了RAC节点故障转移时，应用层连接如何优雅地重定向，以及如何利用Oracle自身的资源管理工具包（如Streams或Data Guard的集成应用）来构建跨地域的灾备方案。阅读过程中，我发现作者的叙述逻辑性极强，即便是面对复杂的RAC版本升级和打补丁流程，也能梳理得井井有条，让我这个“老兵”也醍醐灌顶，找到了过去操作中的一些隐藏风险点。对于任何希望将自己的RAC运维能力提升到专家级别的人来说，这本书的价值无可估量。

说实话，当我翻阅这本书时，我感觉自己像是在和一个经验极其丰富但又略显固执的资深工程师对话。他的表达方式非常直接，几乎没有冗余的修饰词。我特别关注了它在11g版本特有的功能——比如Oracle Clusterware的自我修复能力以及ASM Filter Driver (ASMD) 的配置——所占的篇幅和深度。这本书没有回避在特定Linux发行版（如RHEL/OL）上部署时可能遇到的兼容性陷阱和补丁要求，这对于那些在传统IT架构上维护关键业务系统的团队来说，是救命稻草。我曾试图在网上寻找关于某个特定RAC版本与特定Linux内核补丁冲突的解决方案，结果发现这本书里竟然有专门一节在讨论这种情况下的临时规避策略和长期解决方案。唯一的小遗憾是，由于它成书时间较早，对于后来出现的如Active Data Guard或某些云原生部署模式的讨论，自然是无法涵盖的，但就11g时代的技术深度而言，它提供的基础知识是无法撼动的基石。