3
Cloud Computing
1. Describe the problems that modern
information technology departments face.
2. Describe the key characteristics and
advantages of cloud computing.
3. Identify a use-case-scenario for each of the
four types of clouds.
4. Explain the operational model of each of the
three types of cloud services.
5. Identify the key benefits of cloud computing.
6. Discuss the concerns and risks associated
with cloud computing.
7. Explain the role of Web services in building a
firm’s IT applications, providing examples.
1. Introduction
2. What Is Cloud Computing?
3. Different Types of Clouds
4. Cloud Computing Services
5. The Benefits of Cloud Computing
6. Concerns and Risks with Cloud Computing
7. Web Services and Service-Oriented
Architecture
TG Introduction
3.1 • IT Infrastructure
• Evolution of the Modern IT
Infrastructure
IT Infrastructure
• IT Components
– Hardware
– Software
– Networks
– Databases
– IT Services
• (Developing Information Systems, Managing Security
and Risk, and Managing Data)
Evolution of the Modern IT
Infrastructure
1.
2.
3.
4.
Stand-alone Mainframes
Mainframe and Dumb Terminals
Stand-alone Personal Computers
Local Area Networks (Client/Server
Computing)
5. Enterprise Computing
6. Cloud Computing and Mobile Computing
TG What is Cloud
Computing?
3.2 • Cloud Computing Characteristics
Cloud Computing
Characteristics
– Cloud Computing Provides On-Demand SelfService
– Cloud Computing Encompasses the
Characteristics of Grid Computing
• Grid Computing enables organizations to utilize
resources more efficiently
• Grid Computing provides fault tolerance and
redundancy
• Grid Computing makes it easy to scale up
• Grad Computing makes it easy to scale down
Cloud Computing
Characteristics (Continued)
– Cloud Computing Encompasses the
Characteristics of Utility Computing
– Cloud Computing Utilizes Broad Network Access
– Cloud Computing Pools Computing Resources
– Cloud Computing Often Occurs on Virtualized
Servers
• Server Farms
• Server Virtualization
TG Different Types of Clouds
3.3 • Public Cloud
• Private Cloud (or Corporate
Cloud)
• Hybrid Cloud
• Vertical Clouds
TG Cloud Computing Services
3.4 • Infrastructure-as-a-Service (IaaS)
• Platform-as-a-Service (PaaS)
• Software-as-a-Service (SaaS)
Platform-as-a-Service (PaaS)
• PaaS offers several advantages to
customers:
– Application developers can develop and run their
software solutions on a cloud platform without the
cost of buying and managing the underlying hardware
and software layers
– Underlying computing and storage resources
automatically scale to match application demand
– Operating system features can be upgraded frequently
Platform-as-a-Service (PaaS)
(Con’t)
• PaaS offers several advantages to
customers (Con’t):
– Geographically distributed development teams can
work together on software development projects
– PaaS services can be provided by diverse sources
located throughout the world
– Initial and ongoing costs can be reduced by the
use of infrastructure services from a single vendor
TG The Benefits of Cloud
Computing
3.5 • Seven Major Benefits to
Individuals and Organizations
Seven Major Benefits of Cloud
Computing to Individuals &
Organizations
• Benefit 1: Making Individuals More
Productive
• Benefit 2: Facilitating Collaboration
• Benefit 3: Mining Insights from Data
• Benefit 4: Reduce Costs
Seven Major Benefits of Cloud
Computing to Individuals &
Organizations (Con’t)
• Benefit 5: Expand the Scope of Business
Operations
• Benefit 6: Respond Quickly to Market
Changes
• Benefit 7: Customize Products and
Services
TG Concerns and Risks with
Cloud Computing
3.6 • Five Categories of Concerns
Five Categories of Cloud
Computing Concerns
• Concern 1: Legacy IT Systems
• Concern 2: Reliability
– Example: Amazon Web Services
• Concern 3: Privacy
• Concern 4: Security
• Concern 5: The Regulatory and Legal
Environment
TG Web Services and ServiceOriented Architecture
3.7 • Benefits Provided to
Organizations by Web Services
• Service-Oriented Architecture
• Web Services are based on Four
Key Protocols
Benefits Provided to
Organizations by Web Services
• The organization can utilize the existing
Internet infrastructure without having to
implement any new technologies
• Organizational personnel can access
remote or local data without having to
understand the complexities of the process
• The organization can create new
applications quickly and easily
Web Services are based on
four key protocols:
• Extensible Markup Language (XML)
• Simple Object Access Protocol (SOAP)
• Web Services Description Language
(WSDL)
• Universal Description, Discovery, and
Integration (UDDI)