CLOUD COMPUTING

By P.DEVI PRASAD

“The computer industry is the only industry that is more fashion- driven than women’s fashion”.

Larry Ellison (CEO Oracle)

Cloud computing is a construct that allows you to access applications that actually resides at a location other than your computer or other internet connected device.

Cloud History

• Cloud dates back as far as the 1950s.• Next major event in cloud computing history occurred in

1969, when J.C.R. Licklider developed ARPANET.• Professor Ramnath Chellappa was the first to use the

term "cloud computing" in 1997.• In 1999, Salesforce became the first site to deliver

applications and software over the Internet.

Cloud

cloud is not a physical thing. The cloud is a network of servers, and each server has a different function. Some servers use computing power to run applications or "deliver a service."

CLOUD LAYERS

Types of Cloud

Public Cloud – Can be accessed by any subscriber. Private Cloud – Established for specific group or organization.Community Cloud – Shared among two or more organizations have similar cloud requirement.Hybrid Cloud – Combination of two or more clouds (public, private or community).

CLOUD COMPONENTS

In a simple topological sense, a cloud computing solution is made up of several elements;-

1. clients.2. the datacenter.3.distributed servers.

Clients

Clients are the devices that the end users interact with to manage their information on the cloud.

Clients are in three categories:-MobileThinThick

Thin clients are becoming an increasingly popular solution because of their price and effect on the environment.Benefit of Thin Client:-

Lower Hardware CostLower IT CostSecurityData SecurityLess Power ConsumptionEase of repair or replacementLess noise

Datacenter

The collection of servers where the application to which you subscribe is housed.

Distributed Servers

Often, servers are in geographically disparate locations.

Full Virtualization:-

Full virtualization is a technique in which a complete installation of one machine is run on another.

Paravirtualization

Allows multiple operating system to run on a single hardware device at the same time by more efficiently using system resources, like processor and memory.

Services

Is the concept of being able to use reusable, fine-grained components across the vendor’s network.

Software as a service (SaaS)Platform as a service (PaaS)Infrastructure as a service(IaaS)

http://www.google.co.in/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=02vcvsZJU2Kb_M&tbnid=hgdSl0p-AH-fkM:&ved=0CAUQjRw&url=http://tech-updaters.blogspot.com/2012/07/what-is-cloud-computing.html&ei=OzxyU6mLHoaE8gWj0IGQAg&psig=AFQjCNHujffLjMf35RXEbIe-jXIYHzTsjw&ust=1400081120194373

Advantages:-

Cost EfficientAlmost Unlimited StorageBackup and RecoveryAutomatic Software IntegrationEasy Access to InformationQuick Deployment

Cloud services (Examples)

• Microsoft:-Microsoft Office 365(Microsoft Skydrive in the case of Office), Web apps• Google Drive: Gmail, Google Calendar, Google Reader,

Google Voice, and so on. • Apple iCloud• Amazon Cloud DriveCloudHardware

primary example of a device that is completely cloud-centric is the Samsung Chromebook Series 3(an inexpensive laptop)

Cloud-Service Providers

CtrlS.com, Netmagic Solutions, bsnlcloud, IBM, NEC, Netapp humyo.com etc.

Cloud Computing- Conclusion-

Rather than experiencing a technological revolution ,cloud is the way we consume IT resources.The network is the foundation of cloud computing