Reliability and Availability of Cloud Computing

Figures xvii
 
Tables xxi
 
Equations xxiii
 
Introduction xxv
 
I BASICS 1
 
1 CLOUD COMPUTING 3
 
1.1 Essential Cloud Characteristics 4
 
1.2 Common Cloud Characteristics 6
 
1.3 But What, Exactly, Is Cloud Computing? 7
 
1.4 Service Models 9
 
1.5 Cloud Deployment Models 11
 
1.6 Roles in Cloud Computing 12
 
1.7 Benefi ts of Cloud Computing 14
 
1.8 Risks of Cloud Computing 15
 
2 VIRTUALIZATION 16
 
2.1 Background 16
 
2.2 What Is Virtualization? 17
 
2.3 Server Virtualization 19
 
2.4 VM Lifecycle 23
 
2.5 Reliability and Availability Risks of Virtualization 28
 
3 SERVICE RELIABILITY AND SERVICE AVAILABILITY 29
 
3.1 Errors and Failures 30
 
3.2 Eight-Ingredient Framework 31
 
3.3 Service Availability 34
 
3.4 Service Reliability 43
 
3.5 Service Latency 46
 
3.6 Redundancy and High Availability 50
 
3.7 High Availability and Disaster Recovery 56
 
3.8 Streaming Services 58
 
3.9 Reliability and Availability Risks of Cloud Computing 62
 
II ANALYSIS 63
 
4 ANALYZING CLOUD RELIABILITY AND AVAILABILITY 65
 
4.1 Expectations for Service Reliability and Availability 65
 
4.2 Risks of Essential Cloud Characteristics 66
 
4.3 Impacts of Common Cloud Characteristics 70
 
4.4 Risks of Service Models 72
 
4.5 IT Service Management and Availability Risks 74
 
4.6 Outage Risks by Process Area 80
 
4.7 Failure Detection Considerations 83
 
4.8 Risks of Deployment Models 87
 
4.9 Expectations of IaaS Data Centers 87
 
5 RELIABILITY ANALYSIS OF VIRTUALIZATION 90
 
5.1 Reliability Analysis Techniques 90
 
5.2 Reliability Analysis of Virtualization Techniques 95
 
5.3 Software Failure Rate Analysis 100
 
5.4 Recovery Models 101
 
5.5 Application Architecture

ERIC BAUER is a reliability engineering manager in the Software, Solutions and Services Group of Alcatel-Lucent. The holder of more than a dozen U.S. patents, he is the author of Design for Reliability: Information and Computer-Based Systems, Beyond Redundancy: How Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems, and Practical System Reliability, also available from Wiley-IEEE Press.
 
RANDEE ADAMS is a consulting member of technical staff in the Software, Solutions and Services Group of Alcatel-Lucent and the coauthor of Beyond Redundancy: How Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems.

"Therefore, it will probably only be of real interest to those who are directly involved in improving or implementing their own systems in a cloud platform." ( Computing Reviews , 30 November 2012)

"For sure, specialists responsible for recommending, providing, or managing cloud platforms for either private or public cloud will profit with having this work on their shelf. I would also like to highly recommend this position for people new to the considered concepts of cloud computing or computer systems reliability as it provides an excellent background for the both areas." (IEEE Communications Magazine, 1 October 2013)
 
"Therefore, it will probably only be of real interest to those who are directly involved in improving or implementing their own systems in a cloud platform." (Computing Reviews, 30 November 2012)