Cloud computing


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Cloud computing

  1. 1. Cloud Computing27th July, 2012 MCA – III sem. 1
  2. 2. What is Cloud Computing ? 1) Cloud computing is the construct that allows you to access applications that actually reside at a location other than your computer or other internet connected device; more often, this will be a distant datacenter. 2) cloud computing refers to the delivery of scalable IT resources over the Internet, as opposed to hosting and operating those resources locally, such as on a college or university network. Those resources can include applications and services, as well as the infrastructure on which they operate.27th July, 2012 2
  3. 3. What Works? Internet Your company doesn’t The service providers pay pay for hardware and for equipment and maintenance maintenance27th July, 2012 3
  4. 4. Cloud Components Internet Clients Datacenter Distributed System27th July, 2012 4
  5. 5. Cloud Components 1) Clients : Clients are the devices that the end users interact with to manage their information on the cloud. 2) Datacenter : The datacenter is the collection of servers where the applications to which you subscribe is housed. 3) Distributed Systems : The servers may not be housed in the same location, they may be in geographical disparate locations.27th July, 2012 5
  6. 6. Deployment Model of Cloud Computing27th July, 2012 6
  7. 7. Deployment Model of Cloud Computing 1) Public cloud : Provides an on-demand solution, where you choose to store your data in a public cloud, meaning you use the resources of an off-site third-party provider. Payment is made on a per use basis, much like how you pay for your electricity. One of the main advantages when deciding to use public cloud is that you are not only paying for the space to host your data, but also the cloud provider’s expertise, the security settings, and the trained staff.27th July, 2012 7
  8. 8. Deployment Model of Cloud Computing Basically, you are accessing scalability and reliability, already set up by the cloud provider, without having to build anything in house. 2) Private cloud : The infrastructure is owned and managed by the organization, not by a cloud provider, giving the organization control over the resources involved. The internal IT department sets up, tests, and manages the datacenter. Costs are usually larger than choosing a public cloud.27th July, 2012 8
  9. 9. Deployment Model of Cloud Computing You still need to pay for hosting and servers and to deal with infrastructure, security, and backup, which in a public cloud is the provider’s job. 3) Hybrid cloud : Since cloud computing can use both internal and external solutions, there is also the option of not going completely on a public cloud, at least not in regards to confidential data. Therefore, you can choose to maintain some information stored in-house, and use public cloud for lower priority information.27th July, 2012 9
  10. 10. Service Model of Cloud Computing The term services in cloud computing is the concept of being able to use reusable components across vender’s network. This is widely known as “as a service”. 1) Software as a services (SaaS) : Software as a service (SaaS) is a model in which an application is hosted as a service to customers who access it via the internet. Example : Video Conferencing27th July, 2012 10
  11. 11. Service Model of Cloud Computing Application Internet Service providers offering SaaS Clients27th July, 2012 11
  12. 12. Service Model of Cloud Computing 2) Platform as a services (PaaS) : Platform as a service (PaaS) supplies all the resources required to build applications and services completely from the internet, without having to download or install the software. PaaS services include application design, development, testing, deployment and hosting.27th July, 2012 12
  13. 13. Service Model of Cloud Computing Platform Internet Service providers offering SaaS Clients27th July, 2012 13
  14. 14. Service Model of Cloud Computing 2) Infrastructure as a services (IaaS) : In Infrastructure as a service (IaaS) your application will be executed on virtual computer. The whole cloud infrastructure viz. servers, routers, storage and other networking equipments are provided by the IaaS provider. The costumer buy this resources as a service on a need basis.27th July, 2012 14
  15. 15. Advantages of Cloud Computing 1) Lower Cost 2) More performance 3) Less maintenance 4) More security 5) Unlimited storage capacity27th July, 2012 15
  16. 16. Disadvantages of Cloud Computing 1) Dependency on Internet connectivity 2) Loss of control 3) Unpredictable cost27th July, 2012 16
  17. 17. 27th July, 2012 17