Chapter I Introduction to Cloud Computing.pptx

Introduction to
Cloud Computing
By: Atakilti Brhanu

What is Cloud Computing?
Definition of Cloud Computing
 Cloud computing is the delivery of computing services—including servers, storage,
databases, networking, software, and intelligence—over the internet (“the cloud”) to
offer faster innovation, flexible resources, and economies of scale.
 It enables users to access and store data remotely, avoiding the need for physical
infrastructure.

Key Characteristics of Cloud Computing
 Broad Network
• Accessible from various devices and locations via the internet.
• No need for physical infrastructure at the user's location.
 Resource Pooling
• Multiple customers share resources dynamically allocated.
• Efficient resource utilization and cost savings.
 Rapid Elasticity
• Resources can be scaled up or down quickly to meet changing demands.
• Flexibility and adaptability to varying workloads.
 Measured Service (Pay-as-You-Go)
• Customers pay only for the resources they consume.
• Cost-effective and predictable pricing model.

Key Concepts in Cloud Computing
 Utility Computing: Resources are treated like a utility, such as electricity,
available on demand and paid for based on consumption.
 Service Orientation: IT services are delivered as well-defined units,
allowing for flexibility and scalability.
 Grid Computing: Combines the processing power of multiple
computers to solve complex problems.
 Hardware Virtualization: Creates virtual machines on physical
hardware, enabling efficient resource utilization.

Cloud Deployment Models
Cloud computing offers various deployment models to provide different
organizational needs.
Here's a breakdown of the primary types:
1. Public Cloud
2. Private Cloud
3. Hybrid Cloud
4. Community/Federated Cloud

Public Cloud
 Cloud infrastructure services delivered and operated by third-party cloud
service providers, which deliver computing resources like servers and
storage over the internet.
 With a public cloud, all hardware, software, and other supporting
infrastructure is owned and managed by the cloud provider.
 You access these services and manage your account using a web
browser.
 Example: Google App Engine, Microsoft Azure, Amazon EC2 and IBM

Private Cloud
 A private cloud refers to cloud computing resources used
exclusively by a single business or organization.
 A private cloud can be physically located on the company’s
onsite datacenter. Some companies also pay third-party service
providers to host their private cloud.
 A private cloud is one in which the services and infrastructure
are maintained on a private network.

Hybrid Cloud
 Combines composition of two or more Clouds (public,
private, or community) as unique entities for flexibility
and optimization. But bound by a standardized
technology that enables data and application portability.

Community/ Federated Cloud
 Shared cloud infrastructure for a specific group of
organizations with shared concerns.
 A combination of multiple independent cloud
environments interconnected through a federation.

Cloud Service Models
Cloud computing offers various service
models to provide to different
organizational needs.
Here's a breakdown of the primary
types:
1. Software as a Service (SaaS)
2. Platform as a Service (PaaS)
3. Infrastructure as a Service (IaaS)

Infrastructure-as-a-Service (IaaS)
 IaaS provides fundamental computing resources like servers, storage, and networking
on a pay-as-you-go basis.
 The user is able to deploy and run arbitrary software, which can include operating
systems and applications.
 The user does not manage or control the underlying Cloud infrastructure but has
control over operating systems, storage, deployed applications, and possibly limited
control of some networking components, e.g., host firewalls.

Platform-as-a-Service (PaaS)
 Allows a cloud user to deploy a cloud-based environment for developing, testing, and
deploying applications.
 PaaS is designed to make it easier for developers to quickly create web or mobile
apps, without worrying about setting up or managing the underlying infrastructure of
servers, storage, network, and databases needed for development.

Software-as-a-Service (SaaS)
 SaaS applications are accessed through a web browser or mobile app, eliminating the need
for local installation or software updates.
 Users pay a recurring subscription fee to access the software, often on a per-user or per-
feature basis.
 The software provider manages the infrastructure, updates, and security, allowing users to
focus on their core business needs.
Examples
 Popular SaaS applications include email services (Gmail, Outlook), and productivity
suites (Google Workspace, Microsoft 365)

Benefits of Cloud Computing
Scalability: Cloud services can easily scale up or down to meet changing
demand, eliminating the need for upfront infrastructure investments.
Cost-Effectiveness: Pay-as-you-go pricing models and shared resources
can significantly reduce operational costs.
Security: Cloud providers invest heavily in security measures, offering
robust protection against cyber threats.
Innovation: Access to cutting-edge technologies and resources
accelerates innovation and time-to-market.

Challenges and Considerations of
Cloud Adoption
Security Concerns:
 Data Privacy: Protecting sensitive data from unauthorized
access.
Cost Management
 Hidden Costs: Unexpected fees or charges.
Vendor Lock-in
 Limited Flexibility: Difficulty switching to another
provider.

Challenges and Considerations of
Cloud Adoption…
Performance and Reliability
 Slow response times due to network distance.
Cultural and Organizational Challenges
 Resistance to Change: Overcoming employee resistance to cloud
adoption.
 Skill Gaps and Training: Developing cloud expertise within the
organization.
Migration Challenges
 Data Migration: Moving large amounts of data to the cloud.

Assignment Question
Your organization, MIT, is considering migrating existing on-premises applications to a cloud-based
environment.
Task:
1. Cloud Service Provider Selection:
 Discuss the key factors to consider when choosing a cloud service provider.
 What criteria should be evaluated to ensure reliability and capability?
2. Comparison of Cloud Providers:
 Analyze the differences between Azure, AWS, and IBM Cloud.
 Identify their respective areas of expertise and specialization.
 Under what circumstances would one provider be a better choice over the others?
3. Cloud Service and Deployment Model Evaluation:
 Assess various cloud service models (IaaS, PaaS, SaaS) and deployment models (public, private, hybrid).
 Determine the most suitable options for MIT's specific needs, considering factors like application types, scalability, security, and cost.

Chapter I Introduction to Cloud Computing.pptx

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