企业级应用开发指南：弹性与韧性云计算

windows

azure

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《企业图书馆5 - 构建弹性与健壮的云应用》是一本由Dominic Betts、Jérémi Bourgault、Julian Dominguez、Ercenk Keresteci、Grigori Melnik、Fernando Simonazzi和Erwin van der Valk合著的专业开发者指南，特别针对Windows Azure平台。该书详细阐述了如何利用EnterpriseLibrary Integration Pack来构建能够适应变化、具备弹性和高可用性的云计算应用程序。本书的主要内容涵盖了以下关键知识点： 1. **弹性设计**：在云计算环境中，弹性至关重要。作者们深入探讨了如何通过设计策略，如负载均衡、可扩展性架构和自动调整资源，确保应用在面临流量波动或硬件故障时仍能保持服务连续性。 2. **微服务架构**：书中可能介绍如何将大型应用程序分解为小型、独立的服务单元，每个单元都可以独立伸缩和恢复，从而增强系统的整体韧性。 3. **容错与备份恢复**：讨论了数据冗余、故障转移和备份恢复策略，以降低单点故障的影响，并确保业务连续性。 4. **Windows Azure Integration**：作为专为Windows Azure设计的工具包，本书提供了集成各种云服务（如消息队列、存储、计算）的最佳实践，帮助开发者充分利用Azure的弹性基础设施。 5. **服务网格和服务发现**：介绍了如何利用Azure Service Fabric或类似技术实现服务之间的自动发现和通信，增强系统的动态适应能力。 6. **监控与日志管理**：书中可能会涵盖如何设置有效的监控系统，以便实时检测性能瓶颈和异常，以及如何处理和分析日志以优化应用的健康状况。 7. **故障排查与恢复策略**：提供了一套故障应对流程，包括故障检测、隔离、恢复计划以及演练方法，以应对突发事件。 8. **案例研究与实战演练**：书中可能包含实际项目中的案例，展示如何在实践中应用这些理论，帮助读者理解并掌握弹性与健壮云应用的设计和实现。 9. **最佳实践和指导原则**：总结了在构建云应用过程中的一系列最佳实践，以及避免常见陷阱和挑战的建议。《企业图书馆5 - 构建弹性与健壮的云应用》不仅是一本技术指南，还是一本实践手册，旨在帮助开发人员更好地理解和利用Windows Azure平台，构建出既能应对不断变化的市场需求又能抵御潜在风险的高效云应用。

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Preface

The Windows Azure

™

technology platform offers exciting new op-

portunities for companies and developers to build large and complex

applications to run in the cloud. Windows Azure enables you to take

advantage of a pay-as-you-go billing model for your application infra-

structure and on-demand computing resources.

By combining the existing Microsoft

Enterprise Library applica-

tion blocks that help you design applications that are robust, conﬁgu-

rable, and easy to manage, with new blocks designed speciﬁcally for

the cloud, you can create highly scalable, robust applications that can

take full advantage of Windows Azure.

This book describes a scenario based on a ﬁctitious company

named Tailspin that has decided to enhance its existing Windows

Azure hosted application by using the new Autoscaling Application

Block and Transient Fault Handling Block. Its Windows Azure-based

application, named Surveys, is described in detail in a previous book

in this series, “Developing Applications for the Cloud” at http://msdn.

microsoft.com/en-us/library/ff966499.aspx.

This guide accompanies a reference implementation, which we

encourage you to study and play with to better understand how the

new application blocks operate.

In addition to describing the Windows Azure application and how

it uses the Enterprise Library blocks, this book provides a description

of the key features of the blocks and general guidance on how you

can use them in your own applications.

The result is that, after reading this book, you will be familiar

with how to incorporate the Autoscaling Application Block and the

Transient Fault Handling Application Block in your Windows Azure

applications.

xix

Markus is a software developer who is new to Enterprise Library. He is

analytical, detail-oriented, and methodical. He’s focused on the task at hand,

which is building a great cloud-based application. He knows that he’s the

person who’s ultimately responsible for the code.

I don’t care what platform you want to use for

the application, I’ll make it work.

Ed is an experienced software developer and Enterprise Library expert.

As a true professional, he is well aware of the common crosscutting concerns

that developers face when building line-of-business (LOB) applications for

the enterprise. In the past, he has built his own libraries to satisfy these

concerns, but in the last several years he has used Enterprise Library for

most of these

applications.

Our applications use Enterprise Library for crosscutting

concerns. This provides a level of uniformity across all our

systems that make them easier to support and maintain.

We have invested heavily in our on premises applications

and we must be able to reuse this investment in the cloud.

Poe is an IT professional who’s an expert in deploying and running applications

in the cloud. Poe has a keen interest in practical solutions; after all,

he’s the one who gets paged at 3:00 AM when there’s a problem.

Migrating applications in the cloud involves different

challenges from managing on-premises applications.

I want to make sure our cloud apps are as reliable and

secure as our on-premise apps.

Beth is a business manager. She helps companies to plan how their business

will develop. She understands the market that the company operates in,

the resources that the company has available, and the goals of the company.

She has both a strategic view, and an interest in the day-to-day operations

of the company.

Organizations face many conﬂicting demands on their

resources. I want to make sure that our company balances

those demands and adopts a business plan that will make

us successful in the medium and long term.

preface

If you have a particular area of interest, look for notes provided

by the specialists whose interests align with yours.

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企业级应用开发指南：弹性与韧性云计算

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