1449319777 cloud 1919

Cloud Architecture Patterns

Bill Wilder


Cloud Architecture Patterns
by Bill Wilder
Copyright © 2012 Bill Wilder. All rights reserved.
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Illustrator: Elizabeth O’Connor, Rebecca Demarest

Revision History for the First Edition:
2012-09-20

First release

See for release details.

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ISBN: 978-1-449-31977-9
[LSI]


Table of Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
1. Scalability Primer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scalability Defined
Vertically Scaling Up
Horizontally Scaling Out
Describing Scalability
The Scale Unit
Resource Contention Limits Scalability
Easing Resource Contention
Scalability is a Business Concern
The Cloud-Native Application
Cloud Platform Defined
Cloud-Native Application Defined
Summary

1
3
3
5
6
6
6
7
9
9
10
11

2. Horizontally Scaling Compute Pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Context
Cloud Significance
Impact
Mechanics
Cloud Scaling is Reversible
Managing Session State
Managing Many Nodes
Example: Building PoP on Windows Azure
Web Tier
Stateless Role Instances (or Nodes)
Service Tier
Operational Logs and Metrics

13
14

14
14
14
17
20
22
23
23
24
25

iii


Windows Azure Autoscaling Application Block
(WASABi), 48
Windows Azure Blob Storage Service, 24, 112,
129, 150
Windows Azure Caching, 91
Windows Azure Compute, 112
Windows Azure Connect, 143
Windows Azure Diagnostics (WAD), 25, 112,
146
Windows Azure Fabric Controller, 99
Windows Azure Media Services, 130, 150
Windows Azure Pricing Calculator, 76
Windows Azure Service Bus, 91, 143
Windows Azure SQL Data Sync service, 150
Windows Azure SQL Database Federations, 148
Windows Azure SQL Databases, 72, 90, 139

Windows Azure Storage, 25, 39, 56, 90, 91, 103,
112, 141
Windows Azure Storage Analytics, 26, 112, 146
Windows Azure Storage service, 146
Windows Azure Table Storage service, 24, 112,
148
Windows Azure Traffic Manager, 55, 134, 138,
142, 151
Windows Azure Virtual Networking, 143
Windows Live ID, 141
Windows Phone, 121
Worker Role, 23, 24, 103, 111

Y

Yahoo!, 140

Index

|

161


About the Author
Bill Wilder is a hands-on developer, architect, consultant, trainer, speaker, writer, and
community leader focused on helping companies and individuals succeed with the cloud
using the Windows Azure Platform. Bill began working with Windows Azure when it
was unveiled at the Microsoft PDC in 2008 and subsequently founded Boston Azure,

the first/oldest Windows Azure user group in the world, in October 2009. Bill is recog
nized by Microsoft as a Windows Azure MVP and is the author of Cloud Architecture
Patterns. Bill can be found blogging at blog.codingoutloud.com and on Twitter at @co
dingoutloud.