Cloud Computing Concepts

Cloud Computing

Virtualization

• A key technology that enables cloud computing
• Creates a layer of abstraction between physical hardware and operating systems
• Allows multiple virtual machines (VMs) to run on a single physical machine
• VMs can be easily created, cloned, and deleted as needed

Scalability

• The ability to quickly scale resources up or down to match changing workload demands
• Horizontal scaling: adding more machines to handle increased load
• Vertical scaling: increasing the power of individual machines
• Scalability is a key benefit of cloud computing, allowing users to quickly adapt to changing business needs

IaaS (Infrastructure as a Service)

• Provides virtualized computing resources over the internet
• Users have full control over infrastructure, including servers, storage, and networking
• Examples: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP)

PaaS (Platform as a Service)

• Provides a complete platform for developing, running, and managing applications
• Users have control over applications and data, but not underlying infrastructure
• Examples: Heroku, Google App Engine, Azure App Service

SaaS (Software as a Service)

• Provides software applications over the internet
• Users have no control over underlying infrastructure or application management
• Examples: Office 365, Salesforce, Dropbox

Availability Zones and Regions

• Availability zones: isolated locations within a region that provide redundant resources
• Regions: geographical locations that contain one or more availability zones
• Provides high availability and redundancy, ensuring applications remain accessible even in the event of an outage

Pay-as-you-Go

• A pricing model in which users only pay for the resources they use
• Reduces costs and provides greater flexibility compared to traditional IT models
• Users can scale up or down as needed, without worrying about upfront costs or long-term commitments

Shared Responsibility Model

• A model that outlines the responsibilities of both the cloud provider and the user
• Cloud provider is responsible for security of the cloud, while user is responsible for security in the cloud
• Users must understand their responsibilities to ensure the security and compliance of their applications and data in the cloud

Virtualization

• Enables cloud computing by creating a layer of abstraction between physical hardware and operating systems
• Allows multiple virtual machines (VMs) to run on a single physical machine
• VMs can be easily created, cloned, and deleted as needed, providing flexibility and efficiency

Scalability

• Enables quick scaling of resources up or down to match changing workload demands
• Horizontal scaling involves adding more machines to handle increased load
• Vertical scaling involves increasing the power of individual machines
• Scalability is a key benefit of cloud computing, allowing users to quickly adapt to changing business needs

Service Models

• IaaS (Infrastructure as a Service) provides virtualized computing resources over the internet
  • Users have full control over infrastructure, including servers, storage, and networking
  • Examples: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP)
• PaaS (Platform as a Service) provides a complete platform for developing, running, and managing applications
  • Users have control over applications and data, but not underlying infrastructure
  • Examples: Heroku, Google App Engine, Azure App Service
• SaaS (Software as a Service) provides software applications over the internet
  • Users have no control over underlying infrastructure or application management
  • Examples: Office 365, Salesforce, Dropbox

Availability and Regions

• Availability zones are isolated locations within a region that provide redundant resources
• Regions are geographical locations that contain one or more availability zones
• Provides high availability and redundancy, ensuring applications remain accessible even in the event of an outage

Pricing and Responsibility

• Pay-as-you-Go pricing model allows users to only pay for the resources they use
• Reduces costs and provides greater flexibility compared to traditional IT models
• Shared Responsibility Model outlines the responsibilities of both the cloud provider and the user
  • Cloud provider is responsible for security of the cloud
  • User is responsible for security in the cloud
  • Users must understand their responsibilities to ensure the security and compliance of their applications and data in the cloud

Explore cloud computing concepts such as virtualization and scalability. Learn how they enable efficient resource allocation and management.