云计算手册，could computing

Abstract

Cloud computing promises to increase the velocity with which applications are deployed, increase innovation,

and lower costs, all while increasing business agility. Sun takes an inclusive view of cloud computing that

allows it to support every facet, including the server, storage, network, and virtualization technology that drives

cloud computing environments to the software that runs in virtual appliances that can be used to assemble

applications in minimal time. This white paper discusses how cloud computing transforms the way we design,

build, and deliver applications, and the architectural considerations that enterprises must make when adopting

and using cloud computing technology.

INTRODUCTION TO

Table of Contents

Sun’s perspective ................................................................................................ 1

Building on established trends ............................................................................. 3

Virtual machines as the standard deployment object ........................................ 3

The on-demand, self-service, pay-by-use model ................................................. 4

Services are delivered over the network............................................................ 7

The role of open source software ..................................................................... 8

Cloud computing infrastructure models ............................................................... 9

Lower cost of entry ....................................................................................... 16

Increased pace of innovation ......................................................................... 16

Evolving application architectures ...................................................................... 17

Changing approaches to architecture ............................................................. 17

Changing application designs ........................................................................ 17

The goals remain the same ................................................................................ 19

Consistent and stable abstraction layer .............................................................. 20

Standards help to address complexity ............................................................ 21

Loose-coupled, stateless, fail-in-place computing ................................................ 23

Compliance and data physics ........................................................................ 28

Security and data physics .............................................................................. 29

Network security practices ................................................................................ 29

Innovations from the Sun community ................................................................ 31

Community and open standards ........................................................................ 32

The importance of choice .................................................................................. 32

Choosing a cloud computing provider ................................................................ 32

Acknowledgments ............................................................................................ 33

accessible only by authorized applications and users. It can be supported by a cloud

provider that sets up a platform that includes the OS, Apache, a MySQL™ database,

Perl, Python, and PHP with the ability to scale automatically in response to changing

workloads. Cloud computing can be the ability to use applications on the Internet

that store and protect data while providing a service — anything including email,

sales force automation and tax preparation. It can be using a storage cloud to hold

application, business, and personal data. And it can be the ability to use a handful of

Web services to integrate photos, maps, and GPS information to create a mashup in

customer Web browsers.

Sun’s perspective

is ready to support cloud computing. As the company that coined the phrase “The

Network is the Computer™,” we believe that cloud computing is the next generation

of network computing.

What distinguishes cloud computing from previous models? Boiled down to a

phrase, it’s using information technology as a service over the network. We define it

as services that are encapsulated, have an API, and are available over the network.

This definition encompasses using both compute and storage resources as services.

Cloud computing is based on the principle of efficiency above all — efficiency that

produces high-level tools for handling 80% of use cases so that applications can be

created and deployed at an astonishing rate.