CLOUD COMPUTING

Cloud Computing Distributed computing on internet Or delivery of

computing service over the internet.

Instead of keeping data on your own hard drive you use a service over the Internet, at another location, to store your information or use its applications.

Cloud services are popular because they can reduce the cost and complexity of owning and operating computers and networks.

Cloud benefits to users include scalability, reliability, and efficiency.

HISTORY "cloud computing" gradually evolved in 1950’s when

large-scale mainframes were made available .

The real implementation of virtual machines came in the 70s when IBM released an operating system called VM.

In the 1990s, telecommunications companies began offering virtual private network (VPN) services with comparable quality of service, but at a lower cost.

Architecture

CHARACTERISTICS

Service

Rapid Elasticity

On-Demand Self-Service

Ubiquitous Network Access

Resource Pooling

TYPES OF CLOUD

Public Cloud

Public clouds are owned and operated by third parties, they deliver superior economies of scale to customers, as the infrastructure costs are spread among a mix of users, giving each individual client an attractive low-cost, “Pay-as-you-go” model. y third parties; they deliver superior economies of scale.

Private Cloud

Private clouds are built exclusively for a single enterprise.

They aim to address concerns on data security and offer greater control, which is typically lacking in a public cloud.

Hybrid Cloud

Hybrid Clouds combine both public and private cloud models.

With a Hybrid Cloud, service providers can utilize 3rd party Cloud Providers in a full or partial manner thus increasing the flexibility of computing.

The Hybrid cloud environment is capable of providing on-demand, externally provisioned scale

Cloud Computing Services SaaS (Software as a service):

Required software, Operating system & network is provided.

PaaS (Platform as service): Operating system and network is provided.

IaaS (Infrastructure as a service): just Network is provided.

Cloud Computing Services

Saas (Software As a Service ) We can access this cloud hosted

application without any additional hardware or software.

E.g. : G-mail, Yahoo mail, Hotmail etc.,

Paas (Platform As a Service ) Give us nice API (Application

Programming Interface) and take care of the implementation.

It is a platform for developers to write and create their own SaaS. i.e. applications.

Iaas (Infrastucture As a Service ) It is also known as hardware as a

service.

Iaas is a computing power that you can rent for a limited period of time.

allows existing applications to be run on a cloud suppliers hardware.

ADVANTAGES

Software as a Subscription

Reduced Software Maintenance

Increased Reliability

Environmentally Friendly

Cost Reduction

Portability/Accessibility

DISADVANTAGES

Bandwidth could bust your budget

App performance could suffer

Data might not be cloud-worthy

Too big to scale

Conclusion

Cloud Computing is the fastest growing part of IT.

Tremendous benefits to customers of all sizes storage space.

Cloud services are simpler to acquire and scale up or down

conclusion

Public clouds work great for some but not for all applications.

Private clouds offer many benefits for internal applications.

Public and private clouds can be used in combination.

Real Time Application Google -Network Made up of millions of servers, which stores amounts of data. Amazon’s Elastic Compute Cloud-

AmazonIt provides resizable computing capacity on cloud,Developer’s only pay for capacity they use.