Introduction to Cloud Computing Outline Defining Cloud Computing

Introduction to Cloud Computing

Outline § Defining Cloud Computing § Evolution of Cloud Computing § Characteristics of a Cloud § Cloud Computing Architecture § Cloud Services: Iaa. S, Paa. S, Saa. S § Pros and Cons § Public Clouds and related resources 2

What is Cloud Computing? NIST Definition “A model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. ” 3

History 4

Evolution of Cloud Computing 5

Evolution of Cloud Services 6

Components of the Cloud § Front-end (regular desktop, thin client, mobile device) § Back-end (servers) § Storage / Datacenters § Delivery Service (Saa. S, Paa. S, Iaa. S) 7

Service Models (Saa. S) § Saa. S – Software as a Service Network hosted application; consumers purchase the ability to access and use the application; consumer cannot manage or control the underlying cloud infrastructure § Examples • Google Apps • Sales. Force CRM 8

Service Models (Paa. S) § Paa. S – Platform as a Service Consumer has the ability to deploy their own applications onto the cloud infrastructure; consumer cannot manage or control the underlying cloud infrastructure § Examples • Google App Engine • Force. com (Sales. Force Dev Platform) 9

Service Models (Iaa. S) § Iaa. S – Infrastructure as a Service Consumers has the ability to provision processing, storage, networks, and other fundamental computing resources; consumer cannot manage or control the underlying cloud infrastructure but can control the operating systems, storage and deployed applications § Examples • Amazon EC 2 10

More Service Models § Daa. S – Data as a Service Consumer queries against provider’s database § Naa. S – Network as a Service Provider offers virtualized networks (e. g. VPNs) 11

Deployment Models § Public Cloud infrastructure is provisioned for open use by the general public. § Private Cloud infrastructure is provisioned for exclusive use by a single organization comprising multiple consumers (business units) 12

Deployment Models 13

Deployment Models § Community Cloud infrastructure is provisioned for exclusive use by a specific community of consumers § Hybrid Cloud infrastructure is a composition og two or more distinct cloud infrastructures (public, private, or community) 14

Key Characteristics § On-demand self-service • Users can acquire, configure, and deploy cloud services without requiring human interaction from the service provider § Broad network access • Capabilities are available over the network and accessed through standard mechanisms § Resource pooling • The provider’s computing resources are pooled to serve multiple customers 15

Key Characteristics § Rapid elasticity • Illusion of infinite computing resources available on-demand • Resources can be obtained in any quantity at any time § Measured service • Services priced on short-term basis and released as soon as not needed • Resource usage is monitored, controlled, and reported 16

Advantages of Cloud Computing § Saa. S – easy consumer adoption § Paa. S – good for developers § Iaa. S – complete control of environment and infrastructure 17

Disadvantages of Cloud Computing § Saa. S – limited functionality, no control or access to underlying technology § Paa. S – restricted to whatever is available on the platform and other dependencies § Iaa. S - expensive 18

Benefits § Cost-saving § Scalability, Flexibility, reliability § Ongoing maintenance 19

Challenges § Security and privacy § Lack of standards § Continuously evolving 20