Chapter 1 - Intro to Cloud Computing

Cloud Computing

The delivery of services such as storage, servers, databases, networking, and software over the Internet.

Cloud Computing Components

Hardware and Software.

Cloud Hardware Components

Servers, Storage, Networking Equipment, Data Centers.

Cloud Software Components

Virtualization Software, Cloud Management Tools, Operating Systems, Application Software.

Virtualization Software

Creates virtual versions of computers, operating systems, and storage devices.

Cloud Computing Characteristics

On-Demand Self-Service, Broad Network Access, Resource Pooling, Rapid Elasticity, Measured Service.

On-Demand Self-Service

Users can provision computing resources automatically without human interaction.

Broad Network Access

Cloud services are accessible via various devices like mobile phones, laptops, and PDAs.

Resource Pooling

Cloud providers dynamically assign resources to multiple users.

Rapid Elasticity

Cloud resources can be scaled up or down quickly based on demand.

Measured Service

Cloud providers monitor and optimize resource usage for transparency.

Three Main Cloud Service Models

Infrastructure as a Service (IaaS), Platform as a Service (PaaS), Software as a Service (SaaS).

IaaS Definition

Provides virtualized computing resources such as VMs, storage, and networking.

IaaS Providers

Microsoft Azure Virtual Machines, Amazon EC2, Google Compute Engine.

IaaS Key Features

Resource Scalability, Self-Service, Pay-as-you-go Pricing, Network Access, Storage and Backup.

SaaS Definition

Cloud-based applications delivered over the Internet on a subscription basis.

SaaS Examples

Google Docs, Microsoft Office 365, Dropbox.

SaaS Key Features

No Maintenance, Multi-Tenancy, Accessibility from any device, Subscription-Based.

PaaS Definition

Provides a development platform with built-in tools for coding, testing, and deploying applications.

PaaS Providers

Microsoft Azure App Services, Google App Engine, Heroku.

PaaS Key Features

Development Framework, Built-in Services, Multi-Language Support, Automated Scaling.

Four Cloud Deployment Models

Public Cloud, Private Cloud, Hybrid Cloud, Community Cloud.

Public Cloud

Services offered over the Internet to multiple users by third-party providers.

Public Cloud Providers

AWS, Microsoft Azure, Google Cloud Platform (GCP).

Private Cloud

A cloud environment dedicated to a single organization.

Hybrid Cloud

A combination of private and public cloud infrastructures.

Community Cloud

A cloud infrastructure shared among multiple organizations with common needs.

Hybrid Cloud Advantage

Combines security of private cloud with scalability of public cloud.

Community Cloud Use Cases

Government agencies, universities, research institutions.

Cloud Computing Benefits

Cost Efficiency, Business Continuity, Accessibility, Flexibility.

Disaster Recovery

Cloud-based backup and failover options improve resilience.

Environmentally Friendly

Cloud data centers are more energy-efficient than on-premises servers.

Pay-Per-Use Model

Users pay only for the resources they consume.

Cloud Security

Cloud providers offer advanced security features for data protection.

Cloud Computing Challenges

Security and Privacy, Vendor Lock-in, Performance and Latency.

Vendor Lock-in

Difficulty in switching cloud providers due to dependencies.

Data Mobility

Challenges in transferring data between providers due to costs and compatibility.

Performance and Latency

Potential delays in data transmission based on location.

Management Complexity

Hybrid and multi-cloud setups require careful resource management.

Long-Term Costs

Although cost-effective initially, long-term expenses may rise with higher service usage.