Cloud Computing

Anis Najihah Mohd Ismail

DEFINITION:is Internet-based computing, whereby shared resources, software, and information are provided to computers and other devices on demand, like the electricity grid

• Individual can set themselves up without needing anyone’s help.

On-demand self-service

• Available through standard Internet-enabled devices.

Ubiquitous network access

• Processing and storage demand are balanced across a common infrastructure with no particular resource assigned to any individual user

Location independent

resource pooling

• Consumer can increase or decrease capacity at will.

Rapid elasticity

• Consumer are charged based on their usage of a combination of computing power, bandwidth use or storage.

Pay per use

•Hardware Layer •Server Layer

•IaaS Layer

•PaaS Layer•SaaS Layer

Hardware Layer

The hardware is expected to be inexpensive commodity

hardware with no fault tolerance. Redundancy and fault

tolerance are handled within the software layer,

so hardware is expected to fail.

Server Layer

The servers layer consists of computer

hardware and/or computer software products

that are specifically designed for the

delivery of cloud services, including multi-core processors,

cloud-specific operating systems and combined offerings.[

IaaS Layer(Infrastructure as a Service.)

No need to purchase or manage physical data

center equipment (servers, storage, networking etc)

PaaS Layer(Platform as a Service)

No need to directly manage OS database, etc. APIs for

building higher level application. Pre- built application

components

SaaS Layer(Software as a Service)

Complete application, customizable within limits , solving

specific business needs, with focus on end user requirements

a service provider makes resources, such as application and storage available to the general public over the internet . It may be free or offered on a ay-per usage model

Hybrid Cloud

A hybrid environment consist of multiple internal/external providers will be typical for most enterprise

Private cloud

Private cloud and internal cloud are neologism that some vendors have recently use to describe offerings that emulate cloud computing on private networks.