Cloud Computing: Concepts, Technology & Architecture

Prentice Hall
Thomas Erl / Ricardo Puttini / Zaigham Mahmood  
Total pages
May 2013
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Cloud Computing: Concepts, Technology & Architecture
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Cloud Computing: Concepts, Technology and Architecture is the result of years of research and analysis of the commercial cloud computing industry, cloud computing vendor platforms, and further innovation and contributions made by cloud computing industry standards organizations and practitioners. This book breaks down proven and mature cloud computing technologies and practices into a series of well-defined concepts, models, and technology mechanisms. In doing so, the book establishes concrete, academic coverage of fundamental aspects of cloud computing concepts and technologies, carefully described to ensure full alignment with the cloud computing industry.


  • Instructor resources including chapter-by-chapter PowerPoint Presentation and an Instructor's Guide
  • Structured format and breakdown of cloud computing technologies and models into well-defined components, concepts, and mechanisms makes it ideal for classroom study
  • Clean separation of cloud computing topics within book by chapter make for suitable individual lessons or seminars by instructor
  • Provides well-researched and well-defined coverage from an industry-centric and vendor-neutral perspective

Table of Contents

Foreword   xxix

Acknowledgments   xxxiii

CHAPTER 1: Introduction   1

1.1 Objectives of This Book   3

1.2 What This Book Does Not Cover   4

1.3 Who This Book Is For   4

1.4 How This Book Is Organized   4

1.5 Conventions   9

Symbols and Figures   9

Summary of Key Points   9

1.6 Additional Information   9

Updates, Errata, and Resources (    9

Referenced Specifications (    10

The Service Technology Magazine (    10

International Service Technology Symposium (    10

What Is Cloud? (    10

What Is REST? (    10

Cloud Computing Design Patterns (    10

Service-Orientation (    11 Certified Cloud (CCP) Professional (    11 SOA Certified (SOACP) Professional (    11

Notification Service   11

CHAPTER 2: Case Study Background   13

2.1 Case Study #1: ATN   14

Technical Infrastructure and Environment   14

Business Goals and New Strategy   15

Roadmap and Implementation Strategy   15

2.2 Case Study #2: DTGOV   16

Technical Infrastructure and Environment   17

Business Goals and New Strategy   18

Roadmap and Implementation Strategy   19

2.3 Case Study #3: Innovartus Technologies Inc   20

Technical Infrastructure and Environment   20

Business Goals and Strategy   20

Roadmap and Implementation Strategy   21


CHAPTER 3: Understanding Cloud Computing   25

3.1 Origins and Influences   26

A Brief History   26

Definitions   27

Business Drivers   28

Capacity Planning   28

Cost Reduction   29

Organizational Agility   30

Technology Innovations   30

Clustering   31

Grid Computing   31

Virtualization   32

Technology Innovations vs. Enabling Technologies   32

3.2 Basic Concepts and Terminology   33

Cloud   33

IT Resource   34

On-Premise   36

Cloud Consumers and Cloud Providers   36

Scaling   37

Horizontal Scaling   37

Vertical Scaling   37

Cloud Service   38

Cloud Service Consumer   40

3.3 Goals and Benefits   40

Reduced Investments and Proportional Costs   41

Increased Scalability   42

Increased Availability and Reliability   43

3.4 Risks and Challenges   45

Increased Security Vulnerabilities   45

Reduced Operational Governance Control   45

Limited Portability Between Cloud Providers   47

Multi-Regional Compliance and Legal Issues   48

CHAPTER 4: Fundamental Concepts and Models   51

4.1 Roles and Boundaries   52

Cloud Provider   52

Cloud Consumer   52

Cloud Service Owner   53

Cloud Resource Administrator   54

Additional Roles   56

Organizational Boundary   56

Trust Boundary   57

4.2 Cloud Characteristics   58

On-Demand Usage   59

Ubiquitous Access   59

Multitenancy (and Resource Pooling)    59

Elasticity   61

Measured Usage   61

Resiliency   61

4.3 Cloud Delivery Models   63

Infrastructure-as-a-Service (IaaS)    64

Platform-as-a-Service (PaaS)    65

Software-as-a-Service (SaaS)    66

Comparing Cloud Delivery Models   67

Combining Cloud Delivery Models   69

IaaS + PaaS   69

IaaS + PaaS + SaaS   72

4.4 Cloud Deployment Models   73

Public Clouds   73

Community Clouds   74

Private Clouds   75

Hybrid Clouds   77

Other Cloud Deployment Models   78

CHAPTER 5: Cloud-Enabling Technology   79

5.1 Broadband Networks and Internet Architecture   80

Internet Service Providers (ISPs)    80

Connectionless Packet Switching (Datagram Networks)    83

Router-Based Interconnectivity   83

Physical Network   84

Transport Layer Protocol   84

Application Layer Protocol   85

Technical and Business Considerations   85

Connectivity Issues   85

Network Bandwidth and Latency Issues   88

Cloud Carrier and Cloud Provider Selection   89

5.2 Data Center Technology   90

Virtualization   90

Standardization and Modularity   90

Automation   91

Remote Operation and Management   92

High Availability   92

Security-Aware Design, Operation, and Management   92

Facilities   92

Computing Hardware   93

Storage Hardware   93

Network Hardware   95

Carrier and External Networks Interconnection   95

Web-Tier Load Balancing and Acceleration   95

LAN Fabric   95

SAN Fabric   95

NAS Gateways   95

Other Considerations   96

5.3 Virtualization Technology   97

Hardware Independence   98

Server Consolidation   98

Resource Replication   98

Operating System-Based Virtualization   99

Hardware-Based Virtualization   101

Virtualization Management   102

Other Considerations   102

5.4 Web Technology   103

Basic Web Technology   104

Web Applications   104

5.5 Multitenant Technology   106

5.6 Service Technology   108

Web Services   109

REST Services   110

Service Agents   111

Service Middleware   112

5.7 Case Study Example   113

CHAPTER 6: Fundamental Cloud Security   117

6.1 Basic Terms and Concepts   118

Confidentiality   118

Integrity   119

Authenticity   119

Availability   119

Threat   120

Vulnerability   120

Risk   120

Security Controls   120

Security Mechanisms   121

Security Policies   121

6.2 Threat Agents   121

Anonymous Attacker   122

Malicious Service Agent   123

Trusted Attacker   123

Malicious Insider   123

6.3 Cloud Security Threats   124

Traffic Eavesdropping   124

Malicious Intermediary   124

Denial of Service   126

Insufficient Authorization   127

Virtualization Attack   127

Overlapping Trust Boundaries   129

6.4 Additional Considerations   131

Flawed Implementations   131

Security Policy Disparity   132

Contracts   132

Risk Management   133

6.5 Case Study Example   135


CHAPTER 7: Cloud Infrastructure Mechanisms   139

7.1 Logical Network Perimeter   140

Case Study Example   142

7.2 Virtual Server   144

Case Study Example   145

7.3 Cloud Storage Device   149

Cloud Storage Levels   149

Network Storage Interfaces   150

Object Storage Interfaces   151

Database Storage Interfaces   151

Relational Data Storage   151

Non-Relational Data Storage   152

Case Study Example   152

7.4 Cloud Usage Monitor   155

Monitoring Agent   155

Resource Agent   155

Polling Agent   157

Case Study Example   157

7.5 Resource Replication   161

Case Study Example   162

7.6 Ready-Made Environment   166

Case Study Example   167

CHAPTER 8: Specialized Cloud Mechanisms   169

8.1 Automated Scaling Listener   170

Case Study Example   172

8.2 Load Balancer   176

Case Study Example   177

8.3 SLA Monitor   178

Case Study Example   180

SLA Monitor Polling Agent   180

SLA Monitoring Agent   180

8.4 Pay-Per-Use Monitor   184

Case Study Example   187

8.5 Audit Monitor   189

Case Study Example   189

8.6 Failover System   191

Active-Active   191

Active-Passive   194

Case Study Example   196

8.7 Hypervisor   200

Case Study Example   201

8.8 Resource Cluster   203

Case Study Example   206

8.9 Multi-Device Broker   208

Case Study Example   209

8.10 State Management Database   210

Case Study Example   211

CHAPTER 9: Cloud Management Mechanisms   213

9.1 Remote Administration System   214

Case Study Example   219

9.2 Resource Management System   219

Case Study Example   221

9.3 SLA Management System   222

Case Study Example   224

9.4 Billing Management System   225

Case Study Example   227

CHAPTER 10: Cloud Security Mechanisms   229

10.1 Encryption   230

Symmetric Encryption   231

Asymmetric Encryption   231

Case Study Example   233

10.2 Hashing   234

Case Study Example   235

10.3 Digital Signature   236

Case Study Example   238

10.4 Public Key Infrastructure (PKI)    240

Case Study Example   242

10.5 Identity and Access Management (IAM)    243

Case Study Example   244

10.6 Single Sign-On (SSO)    244

Case Study Example   246

10.7 Cloud-Based Security Groups   247

Case Study Example   249

10.8 Hardened Virtual Server Images   251

Case Study Example   252


CHAPTER 11: Fundamental Cloud Architectures   255

11.1 Workload Distribution Architecture   256

11.2 Resource Pooling Architecture   257

11.3 Dynamic Scalability Architecture   262

11.4 Elastic Resource Capacity Architecture   265

11.5 Service Load Balancing Architecture   268

11.6 Cloud Bursting Architecture   271

11.7 Elastic Disk Provisioning Architecture   272

11.8 Redundant Storage Architecture   275

11.9 Case Study Example   277

CHAPTER 12: Advanced Cloud Architectures   281

12.1 Hypervisor Clustering Architecture   282

12.2 Load Balanced Virtual Server Instances Architecture   288

12.3 Non-Disruptive Service Relocation Architecture   293

12.4 Zero Downtime Architecture   298

12.5 Cloud Balancing Architecture   299

12.6 Resource Reservation Architecture   301

12.7 Dynamic Failure Detection and Recovery Architecture   306

12.8 Bare-Metal Provisioning Architecture   309

12.9 Rapid Provisioning Architecture   312

12.10 Storage Workload Management Architecture   315

12.11 Case Study Example   321

CHAPTER 13: Specialized Cloud Architectures   323

13.1 Direct I/O Access Architecture   324

13.2 Direct LUN Access Architecture   326

13.3 Dynamic Data Normalization Architecture   329

13.4 Elastic Network Capacity Architecture   330

13.5 Cross-Storage Device Vertical Tiering Architecture   332

13.6 Intra-Storage Device Vertical Data Tiering Architecture   337

13.7 Load Balanced Virtual Switches Architecture   340

13.8 Multipath Resource Access Architecture  342

13.9 Persistent Virtual Network Configuration Architecture   344

13.10 Redundant Physical Connection for Virtual Servers Architecture   347

13.11 Storage Maintenance Window Architecture   350


CHAPTER 14: Cloud Delivery Model Considerations   359

14.1 Cloud Delivery Models: The Cloud Provider Perspective   360

Building IaaS Environments   360

Data Centers   361

Scalability and Reliability   363

Monitoring   363

Security   364

Equipping PaaS Environments   364

Scalability and Reliability   365

Monitoring   367

Security   367

Optimizing SaaS Environments   367

Security   370

14.2 Cloud Delivery Models: The Cloud Consumer Perspective   370

Working with IaaS Environments   370

IT Resource Provisioning Considerations   372

Working with PaaS Environments   373

IT Resource Provisioning Considerations   373

Working with SaaS Services   374

14.3 Case Study Example   375

CHAPTER 15: Cost Metrics and Pricing Models   379

15.1 Business Cost Metrics   380

Up-Front and On-Going Costs   380

Additional Costs   381

Case Study Example   382

Product Catalog Browser   382

On-Premise Up-Front Costs   382

On-Premise On-Going Costs   383

Cloud-Based Up-Front Costs   383

Cloud-Based On-Going Costs   383

Client Database   385

On-Premise Up-Front Costs   385

On-Premise On-Going Costs   385

Cloud-Based Up-Front Costs   385

Cloud-Based On-Going Costs   385

15.2 Cloud Usage Cost Metrics   387

Network Usage   387

Inbound Network Usage Metric   387

Outbound Network Usage Metric   388

Intra-Cloud WAN Usage Metric   388

Server Usage   389

On-Demand Virtual Machine Instance Allocation Metric   389

Reserved Virtual Machine Instance Allocation Metric   389

Cloud Storage Device Usage   390

On-Demand Storage Space Allocation Metric   390

I/O Data Transferred Metric   390

Cloud Service Usage   390

Application Subscription Duration Metric   390

Number of Nominated Users Metric   391

Number of Transactions Users Metric    391

15.3 Cost Management Considerations   391

Pricing Models   393

Additional Considerations   395

Case Study Example   396

Virtual Server On-Demand Instance Allocation   397

Virtual Server Reserved Instance Allocation   399

Cloud Storage Device   401

WAN Traffic   401

CHAPTER 16: Service Quality Metrics and SLAs   403

16.1 Service Quality Metrics   404

Service Availability Metrics   405

Availability Rate Metric   405

Outage Duration Metric   406

Service Reliability Metrics   407

Mean-Time Between Failures (MTBF) Metric   407

Reliability Rate Metric   407

Service Performance Metrics   407

Network Capacity Metric   408

Storage Device Capacity Metric   408

Server Capacity Metric   408

Web Application Capacity Metric   408

Instance Starting Time Metric   409

Response Time Metric   409

Completion Time Metric   409

Service Scalability Metrics   409

Storage Scalability (Horizontal) Metric   410

Server Scalability (Horizontal) Metric   410

Server Scalability (Vertical) Metric   410

Service Resiliency Metrics   411

Mean-Time to Switchover (MTSO) Metric   411

Mean-Time System Recovery (MTSR) Metric   412

16.2 Case Study Example   412

16.3 SLA Guidelines   413

16.4 Case Study Example   416

Scope and Applicability   416

Service Quality Guarantees   416

Definitions   417

Usage of Financial Credits   417

SLA Exclusions   418


Appendix A: Case Study Conclusions   421

A.1 ATN   422

A.2 DTGOV   422

A.3 Innovartus   424

Appendix B: Industry Standards Organizations   427

B.1 National Institute of Standards and Technology (NIST)    428

B.2 Cloud Security Alliance (CSA)    429

B.3 Distributed Management Task Force (DMTF)    429

B.4 Storage Networking Industry Association (SNIA)    430

B.5 Organization for the Advancement of Structured Information Standards (OASIS)    430

B.6 The Open Group   430

B.7 Open Cloud Consortium (OCC)    431

B.8 European Telecommunications Standards Institute (ETSI)    431

B.9 Telecommunications Industry Association (TIA)    431

B.10 Liberty Alliance   432

B.11 Open Grid Forum (OGF)    432

Appendix C: Mapping Mechanisms to Characteristics   433

Appendix D: Data Center Facilities (TIA-942)    437

D.1 Primary Rooms   438

Electrical Room   438

Mechanical Room   438

Storage and Staging   438

Offices, Operations Center, and Support   438

Telecommunications Entrance   438

Computer Room   439

D.2 Environmental Controls   440

External Electrical Power Provider Interconnection   440

Power Distribution   441

Uninterruptible Power Source (UPS)    441

Power Engine-Generator   441

D.3 Infrastructure Redundancy Summary   442

Appendix E: Emerging Technologies   443

E.1 Autonomic Computing   444

E.2 Grid Computing   445

Service Grids   446

Appendix F: Cloud Provisioning Contracts   449

F.1 Cloud Provisioning Contract Structure   450

Terms of Service   452

Service Usage Policy   452

Security and Privacy Policy   453

Warranties and Liabilities   455

Rights and Responsibilities   455

Termination and Renewal   456

Specifications and SLAs   456

Pricing and Billing   457

Other Issues   457

Legal and Compliance Issues   457

Auditability and Accountability   457

Changes in the Contract Terms and Conditions   457

F.2 Cloud Provider Selection Guidelines   458

Cloud Provider Viability   458

Appendix G: Cloud Business Case Template   461

G.1 Business Case Identification   462

G.2 Business Needs   462

G.3 Target Cloud Environment  463

G.4 Technical Issues   464

G.5 Economic Factors   464

About the Authors   465

About the Foreword Contributor   467

About the Contributors   469

Index   471


Thomas Erl is a top-selling IT author, founder of Arcitura Education, editor of the Service Technology Magazine and series editor of the Prentice Hall Service Technology Series from Thomas Erl. With more than 175,000 copies in print world-wide, his books have become international bestsellers and have been formally endorsed by senior members of major IT organizations, such as IBM, Microsoft, Oracle, Intel, Accenture, IEEE, HL7, MITRE, SAP, CISCO, HP, and many others. As CEO of Arcitura Education Inc. and in cooperation with and, Thomas has led the development of curricula for the internationally recognized Cloud Certified Professional (CCP) and SOA Certified Professional (SOACP) accreditation programs, which have established a series of formal, vendor-neutral industry certifications obtained by thousands of IT professionals around the world. Thomas has toured over 20 countries as a speaker and instructor and regularly participates in international conferences, including Service Technology Symposium and Gartner events. More than 100 articles and interviews by Thomas have been published in numerous publications, including The Wall Street Journal and CIO Magazine.

Dr. Zaigham Mahmood is a published author of six books, four of which are dedicated to cloud computing. He acts as a technology consultant at Debesis Education UK and a Researcher at the University of Derby, UK. He further holds positions as a foreign professor and professor extraordinaire with international educational institutions. Professor Mahmood is a certified cloud trainer and a regular speaker at the International SOA, Cloud + Service Technology Symposium, and he has published more than 100 articles. His specialized areas of research include distributed computing, project management, and e-government.

Professor Ricardo Puttini has 15 years of field experience as a senior IT consultant at major government organizations in Brazil. He has taught several undergraduate and graduate-level courses in service orientation, service-oriented architecture, and cloud computing. Ricardo was the general chair of the 4th International SOA Symposium and 3rd International Cloud Symposium that was held in the spring of 2011. He holds a Ph.D. in Communication Networks (2004) from the University of Brasilia, where he has taught in the Electrical Engineering department since 1998. Ricardo spent 18 months at the L′Ecole Superieure d′Electricite (Supelec) in Rennes, France, during his Ph.D., where he started researching distributed system architecture and security.


Reader Review(s)

“Cloud computing, more than most disciplines in IT, suffers from too much talk and not enough practice. Thomas Erl has written a timely book that condenses the theory and buttresses it with real-world examples that demystify this important technology. An important guidebook for your journey into the cloud.”
--Scott Morrison, Chief Technology Officer, Layer 7 Technologies

“An excellent, extremely well-written, lucid book that provides a comprehensive picture of cloud computing, covering multiple dimensions of the subject. The case studies presented in the book provide a real-world, practical perspective on leveraging cloud computing in an organization. The book covers a wide range of topics, from technology aspects to the business value provided by cloud computing. This is the best, most comprehensive book on the subject--a must-read for any cloud computing practitioner or anyone who wants to get an in-depth picture of cloud computing concepts and practical implementation.”
--Suzanne D’Souza, SOA/BPM Practice Lead, KBACE Technologies

“This book offers a thorough and detailed description of cloud computing concepts, architectures, and technologies. It serves as a great reference for both newcomers and experts and is a must-read for any IT professional interested in cloud computing.”
--Andre Tost, Senior Technical Staff Member, IBM Software Group

“This is a great book on the topic of cloud computing. It is impressive how the content spans from taxonomy, technology, and architectural concepts to important business considerations for cloud adoption. It really does provide a holistic view to this technology paradigm.”
--Kapil Bakshi, Architecture and Strategy, Cisco Systems Inc.

“I have read every book written by Thomas Erl and Cloud Computing is another excellent publication and demonstration of Thomas Erl’s rare ability to take the most complex topics and provide critical core concepts and technical information in a logical and understandable way.”
--Melanie A. Allison, Principal, Healthcare Technology Practice, Integrated Consulting Services

“Companies looking to migrate applications or infrastructure to the cloud are often misled by buzzwords and industry hype. This work cuts through the hype and provides a detailed look, from investigation to contract to implementation to termination, at what it takes for an organization to engage with cloud service providers. This book really lays out the benefits and struggles with getting a company to an IaaS, PaaS, or SaaS solution.”
--Kevin Davis, Ph.D., Solutions Architect

“Thomas, in his own distinct and erudite style, provides a comprehensive and a definitive book on cloud computing. Just like his previous masterpiece, Service-Oriented Architecture: Concepts, Technology, and Design, this book is sure to engage CxOs, cloud architects, and the developer community involved in delivering software assets on the cloud. Thomas and his authoring team have taken great pains in providing great clarity and detail in documenting cloud architectures, cloud delivery models, cloud governance, and economics of cloud, without forgetting to explain the core of cloud computing that revolves around Internet architecture and virtualization. As a reviewer for this outstanding book, I must admit I have learned quite a lot while reviewing the material. A ‘must have’ book that should adorn everybody’s desk!”
--Vijay Srinivasan, Chief Architect - Technology, Cognizant Technology Solutions

“This book provides comprehensive and descriptive vendor-neutral coverage of cloud computing technology, from both technical and business aspects. It provides a deep-down analysis of cloud architectures and mechanisms that capture the real-world moving parts of cloud platforms. Business aspects are elaborated on to give readers a broader perspective on choosing and defining basic cloud computing business models. Thomas Erl’s Cloud Computing: Concepts, Technology & Architecture is an excellent source of knowledge of fundamental and in-depth coverage of cloud computing.”
--Masykur Marhendra Sukmanegara, Communication Media & Technology, Consulting Workforce Accenture

“The richness and depth of the topics discussed are incredibly impressive. The depth and breadth of the subject matter are such that a reader could become an expert in a short amount of time.”
--Jamie Ryan, Solutions Architect, Layer 7 Technologies

“Demystification, rationalization, and structuring of implementation approaches have always been strong parts in each and every one of Thomas Erl’s books. This book is no exception. It provides the definitive, essential coverage of cloud computing and, most importantly, presents this content in a very comprehensive manner. Best of all, this book follows the conventions of the previous service technology series titles, making it read like a natural extension of the library. I strongly believe that this will be another bestseller from one of the top-selling IT authors of the past decade.”
--Sergey Popov, Senior Enterprise Architect SOA/Security, Liberty Global International

“A must-read for anyone involved in cloud design and decision making! This insightful book provides in-depth, objective, vendor-neutral coverage of cloud computing concepts, architecture models, and technologies. It will prove very valuable to anyone who needs to gain a solid understanding of how cloud environments work and how to design and migrate solutions to clouds.”
--Gijs in ’t Veld, Chief Architect, Motion10

“A reference book covering a wide range of aspects related to cloud providers and cloud consumers. If you would like to provide or consume a cloud service and need to know how, this is your book. The book has a clear structure to facilitate a good understanding of the various concepts of cloud.”
--Roger Stoffers, Solution Architect

“Cloud computing has been around for a few years, yet there is still a lot of confusion around the term and what it can bring to developers and deployers alike. This book is a great way of finding out what’s behind the cloud, and not in an abstract or high-level manner: It dives into all of the details that you’d need to know in order to plan for developing applications on cloud and what to look for when using applications or services hosted on a cloud. There are very few books that manage to capture this level of detail about the evolving cloud paradigm as this one does. It’s a must for architects and developers alike.”
--Dr. Mark Little, Vice President, Red Hat

“This book provides a comprehensive exploration of the concepts and mechanics behind clouds. It’s written for anyone interested in delving into the details of how cloud environments function, how they are architected, and how they can impact business. This is the book for any organization seriously considering adopting cloud computing. It will pave the way to establishing your cloud computing roadmap.”
--Damian Maschek, SOA Architect, Deutsche Bahn

“One of the best books on cloud computing I have ever read. It is complete yet vendor technology neutral and successfully explains the major concepts in a well-structured and disciplined way. It goes through all the definitions and provides many hints for organizations or professionals who are approaching and/or assessing cloud solutions. This book gives a complete list of topics playing fundamental roles in the cloud computing discipline. It goes through a full list of definitions very clearly stated. Diagrams are simple to understand and self-contained. Readers with different skill sets, expertise, and backgrounds will be able to understand the concepts seamlessly.”
--Antonio Bruno, Infrastructure and Estate Manager, UBS AG

Cloud Computing: Concepts, Technology & Architecture is a comprehensive book that focuses on what cloud computing is really all about.... This book will become the foundation on which many organizations will build successful cloud adoption projects. It is a must-read reference for both IT infrastructure and application architects interested in cloud computing or involved in cloud adoption projects. It contains extremely useful and comprehensive information for those who need to build cloud-based architectures or need to explain it to customers thinking about adopting cloud computing technology in their organization.”
--Johan Kumps, SOA Architect, RealDolmen

“This book defines the basic terminology and patterns for the topic--a useful reference for the cloud practitioner. Concepts from multitenancy to hypervisor are presented in a succinct and clear manner. The underlying case studies provide wonderful real-worldness.”
--Dr. Thomas Rischbeck, Principal Architect, ipt

“The book provides a good foundation to cloud services and issues in cloud service design. Chapters highlight key issues that need to be considered in learning how to think in cloud technology terms; this is highly important in today’s business and technology environments where cloud computing plays a central role in connecting user services with virtualized resources and applications.”
--Mark Skilton, Director, Office of Strategy and Technology, Global Infrastructure Services, Capgemini

“The book is well organized and covers basic concepts, technologies, and business models about cloud computing. It defines and explains a comprehensive list of terminologies and glossaries about cloud computing so cloud computing experts can speak and communicate with the same set of standardized language. The book is easy to understand and consistent with early published books from Thomas Erl.... It is a must-read for both beginners and experienced professionals.”
--Jian “Jeff” Zhong, Chief Technology Officer (Acting) and Chief Architect for SOA and Cloud Computing, Futrend Technology Inc.

“Students of the related specialties can fulfill their educational process with very easily understood materials that are broadly illustrated and clearly described. Professors of different disciplines, from business analysis to IT implementation--even legal and financial monitoring--can use the book as an on-table lecturing manual. IT specialists of all ranks and fields of application will find the book as a practical and useful support for sketching solutions unbound to any particular vendor or brand.”
--Alexander Gromoff, Director of Science & Education, Center of Information Control Technologies, Chairman of BPM Chair in Business Informatics Department, National Research University “Higher School of Economics”

Cloud Computing: Concepts, Technology & Architecture is a comprehensive compendium of all the relevant information about the transformative cloud technology. Erl’s latest title concisely and clearly illustrates the origins and positioning of the cloud paradigm as the next-generation computing model. All the chapters are carefully written and arranged in an easy-to-understand manner. This book will be immeasurably beneficial for business and IT professionals. It is set to shake up and help organize the world of cloud computing.”
--Pethuru Raj, Ph.D., Enterprise Architecture Consultant, Wipro

“A cloud computing book that will stand out and survive the test of time, even in one of the fastest evolving areas of technology. This book does a great job breaking down the high level of complexity of cloud computing into easy-to-understand pieces. It goes beyond the basic, often repeated, explanations. It examines the fundamental concepts and the components, as well as the mechanisms and architectures that make up cloud computing environments. The approach gradually builds the reader’s understanding from the ground up.

“In a rapidly evolving area like cloud computing, it’s easy to focus on details and miss the big picture. The focus on concepts and architectural models instead of vendor-specific details allows readers to quickly gain essential knowledge of complex topics. The concepts come together in the last part of the book, which should be required reading for any decision maker evaluating when and how to start a transition to cloud computing. Its thorough, comprehensive coverage of fundamentals and advanced topics makes the book a valuable resource to keep on your desk or your eBook reader, regardless if you’re new to the topic or you already have cloud experience.

“I highly recommend the book to those looking to implement or evaluate cloud environments, or simply looking to educate themselves in a field that will shape IT over the next decade.”
--Christoph Schittko, Principal Technology Strategist & Cloud Solution Director, Microsoft

Cloud Computing: Concepts, Technology & Architecture is an excellent resource for IT professionals and managers who want to learn and understand cloud computing, and who need to select or build cloud systems and solutions. It lays the foundation for cloud concepts, models, technologies, and mechanisms. As the book is vendor-neutral, it will remain valid for many years. We will recommend this book to Oracle customers, partners, and users for their journey toward cloud computing. This book has the potential to become the basis for a cloud computing manifesto, comparable to what was accomplished with the SOA manifesto.”
--Jurgen Kress, Fusion Middleware Partner Adoption, Oracle EMEA