A basic definition of cloud computing is the use of the Internet for the tasks you perform on your computer. The "cloud" represents the Internet.

DEFINITION

Why Cloud computing…??

Traditional Software

Cloud Computing

DEPLOYMENT MODELS

Public Cloud

DEPLOYMENT MODELS

Private Cloud

DEPLOYMENT MODELS

Hybrid Cloud

Architectural Layers of Cloud Computing

SaaSSoftware as a Service

Software as a Service (SaaS) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.

PaaSPlatform as a Service

Platform as a service (PaaS) is a cloud computing model that delivers applications over the Internet. In a PaaS model, a cloud provider delivers hardware and software tools

IaaSInfrastructure as a Service

Infrastructure as a service (IaaS) is a type of cloud computing in which a third-party provider hosts virtualized computing resources over the Internet.

Trends of Cloud Computing

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Cloud Storage Subscriber Numbers

Million

Forecast

Can be less expensive compared to buying software and hardware

Can be used from any computer or device with an Internet connection

The device does not need as large of an internal storage system

Compatible with most computers and operating systems

Updates occur across the service

Advantages

Disadvantages

1. Requires a constant Internet connection.

2. Does not work well with low-speed connections.

3. Features might be limited.

4. Can be slow.

5. Stored data might not be secure.

6. Stored data can be lost.

Some Cloud Service Providers

Utility ComputingPlatform as a Service (PaaS)

Cloud-based User Applications

Cloud Storage ComparisonStorage Service Comparison on a Annual Basis

Service Provider Free First Payment tier Second Payment tier

Amazon 5GB 20GB ($10) 50GB ($25)

Apple iCloud 5GB 25GB ($40) 50GB ($100)

Box 5GB 25GB ($120) 50GB ($240)

Dropbox 2GB 100GB ($100) 200GB ($200)

Google Drive 5GB 25GB ($30) 100GB ($60)

Microsoft SkyDrive

7GB 27GB ($10) 57GB ($25)

Mega 50GB 400GB ($120) 2TB ($240)

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