What is cloud computing

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Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers connected through a real-time communication network such as the Internet.[1] In science, cloud computing is a synonym for distributed computing over a network, and means the ability to run a program or application on many connected computers at the same time. The phrase also more commonly refers to network-based services, which appear to be provided by real server hardware, and are in fact served up by virtual hardware, simulated by software running on one or more real machines. Such virtual servers do not physically exist and can therefore be moved around and scaled up (or down) on the fly without affecting the end user - arguably, rather like a cloud.

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  • great i specially like 11th slide where u describe which service belongs to saas,pasa or Iass.....great bro..
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What is cloud computing

  1. 1. CONTENTS  Introduction  Functionality of cloud computing  Technologies used in cloud computing  Cloud services  Advantages and disadvantages  Conclusion
  2. 2. What is Cloud Computing?  Cloud computing, often referred to as simply “the cloud,” is the delivery of on-demand computing resources— everything from applications to data centers—over the Internet and on a pay-for-use basis.  Cloud computing is a type of computing that relies on sharing computing resources rather than having local servers or personal devices to handle applications.
  3. 3. Functionality of cloud computing  Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet  In addition, the platform provides on demand services, that are always on, anywhere, anytime and any place.  Pay for use and as needed, elastic, scales up and down in capacity and functionalities  The hardware and software services are available to general ,public, enterprises, businesses markets
  4. 4. Technologies used in Cloud Computing • Physical • Servers • Load Balancer • Data center network • Virtual • Operating System • Security Software • Applications
  5. 5. Cloud Service Models
  6. 6. Library Services using Cloud Worldcat Mendeley ExLibris Research Gate Google Scholar Library Thing Dropbox
  7. 7. Infrastructure as a service (IaaS):  Offer computer’s physical or virtual machines and other resources.  Support large numbers of virtual machines  Offers virtual-machine disk image library, raw (block) and file-based storage, firewalls, load balancers, IP addresses, virtual local area networks (VLANS).  Supply these resources on-demand from their large pools installed in data centres
  8. 8. Platform as a Service (PaaS):  delivers a computing platform, typically including operating system, programming language execution environment, database, and web server.  Useful service for Application Developers  Run and Develop the software without the cost and complexity of buying and managing the underlying hardware and software layers.
  9. 9. Software as a Service:  Provides access to application software and databases  Manages the infrastructure and platforms that run the applications.  Provides install and operate application software on cloud.  Also known as "Software on Demand"
  10. 10. Real World Examples Real World Examples
  11. 11. Advantages of Cloud Computing • Cost saving: You pay for only what you use. • Easy on installation and maintenance. • Increased storage. • Highly automated. • Flexibility. • Better mobility. • Shared resources. • Back up and restoration.
  12. 12. Disadvantages of Cloud Computing • Network connectivity and bandwidth. • Service unavailability due to power outage. • As per requirements updates are needed for client machine. • Does not work well with low speed connection. • Data security. • Privacy.
  13. 13. Conclusion  Cloud Computing is in a period of strong growth, but this technology is still has some issues of security and somewhat it is immature.  The real value of cloud computing is that it makes your library related software and data available transparently and everywhere including in latest available smart phone devices.
  14. 14. References  http://en.wikipedia.org/wiki/Cloud_computing  http://drive.google.com  http://skydrive.live.com  http://www.dropbox.com

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