Cloud computing
- 1. CLOUD COMPUTING WIRELESS NETWORK AND MOBILE COMMUNICATION 5/23/2017 SUBMITTED TO: SIR SHARIQ TEAM MEMBERS: MUHAMMAD FAIZAN (CT-062) ARYSHA CHANNA (CT-056) MUHAMMAD DANIYAL (CT-009)
- 2. Introduction Cloud computing is the delivery of computing services—servers, storage, databases, networking, software, analytics and more—over the Internet (“the cloud”). It is a paradigm that allows on-demand network access to shared computing resources. A model for managing, storing and processing data online via the internet. Uses of cloud computing If you use an online service to send email, edit documents, watch movies or TV, listen to music, play games or store pictures and other files, it is likely that cloud computing is making it all possible behind the scenes. Create new apps and services Store, back up and recover data Host websites and blogs Stream audio and video Deliver software on demand Analyse data for patterns and make predictions Top benefits of cloud computing Here are 6 common reasons organizations are turning to cloud computing services: 1. Utility-Oriented Approach Cloud computing turns IT services into utilities. They have transformed the Internet into a rich application and service delivery platform, mature enough to serve complex needs
- 3. 2. Cost Resources are available through the Internet and offered on a pay-per-use basis from cloud computing vendors. Anyone can subscribe to cloud services and deploy and configure servers for an application in hours, in scalable/elastic infrastructure serving its application according to the demand, and paying only for the time these resources have been used. In addition, consumers no longer need to invest heavily or encounter difficulties in building and maintaining complex IT infrastructure. It also eliminates the expense of buying hardware and software and setting up and maintenance of datacenters and its infrastructure. 3. Speed Services on cloud computing are provided through self service and on demand, with high internet speed, so even vast amounts of computing resources can be provisioned in minutes. 4. Global scale Users access services based on their requirements without regard to where the services are hosted i.e. ability to scale elastically. It helps delivering the right amount of IT resources right when its needed and from the right geographic location. The end users leveraging cloud computing services can access their documents and data anytime, anywhere, and from any device connected to the Internet.
- 4. 5. Productivity Cloud computing allows renting infrastructure, runtime environments, and services on a pay-per-use basis. This principle gives different images of cloud computing to different people through virtualization. On-site work load like hardware set up, software patching and other time- consuming IT management chores are removed, so IT teams can spend time on achieving more important business goals thus increasing productivity. 6. Performance The biggest cloud computing services run on a worldwide network of secure datacenters, which are regularly upgraded to the latest generation of fast and efficient computing hardware. This offers several benefits over a single corporate datacenter, including reduced network latency for applications and greater economies of scale. 7. Reliability Cloud computing makes data backup, disaster recovery, and business continuity easier and less expensive, because data can be mirrored at multiple redundant sites on the cloud provider’s network. Types of cloud deployments: public, private, hybrid There are three different ways to deploy cloud computing resources: public cloud, private cloud and hybrid cloud.
- 5. Public cloud Public clouds are the most common deployment models in which necessary IT infrastructure (e.g., virtualized datacenters) is established by a third-party service provider that makes it available to any consumer on a subscription basis. Such clouds are appealing to users because they allow users to quickly leverage compute, storage, and application services. In this environment, users’ data and applications are deployed on cloud datacenters on the vendor’s premises Public clouds are owned and operated by a third-party cloud service provider, which deliver their computing resources like servers and storage over the Internet. Microsoft Azure is an example of a public cloud. With a public cloud, all hardware, software and other supporting infrastructure is owned and managed by the cloud provider. You access these services and manage your account using a web browser. Private cloud A private cloud refers to cloud computing resources used exclusively by a single business or organization. A private cloud can be physically located on the company’s on-site datacenter. Some companies also pay third-party service providers to host their private cloud. A private cloud is one in which the services and infrastructure are maintained on a private network. The use of cloud-based in-house solutions is also driven by the need to keep confidential information within an organization’s premises. Institutions such as governments and banks that have high security, privacy, and
- 6. regulatory concerns prefer to build and use their own private or enterprise clouds. Hybrid cloud Hybrid computing systems partially composed of public cloud resources and privately owned infrastructures. Hybrid clouds combine public and private clouds, bound together by technology that allows data and applications to be shared between them. By allowing data and applications to move between private and public clouds, hybrid cloud gives businesses greater flexibility and more deployment options.
- 7. Types of cloud services: IaaS, PaaS, SaaS Most cloud computing services fall into three broad categories: 1) Infrastructure-as-a-service (IaaS) Infrastructure-as-a-Service solutions deliver infrastructure on demand in the form of virtual hardware, storage, and networking. Virtual hardware is utilized to provide compute on demand in the form of virtual machine instances. These are created at users’ request on the provider’s infrastructure, and users are given tools and interfaces to configure the software stack installed in the virtual machine. The pricing model is usually defined in terms of dollars per hour, where the hourly cost is influenced by the characteristics of the virtual hardware. Virtual storage is delivered in the form of raw disk space or object store. The former complements a virtual hardware offering that requires persistent storage. The latter is a more high- level abstraction for storing entities rather than files. Virtual networking identifies the collection of services that manage the networking among virtual instances and their connectivity to the Internet or private networks The most basic category of cloud computing services. With IaaS, you rent IT infrastructure—servers and virtual machines (VMs), storage, networks, operating systems—from a cloud provider on a pay-as-you-go basis. 2) Platform as a service (PaaS) Platform-as-a-Service solutions are the next step in the stack. They deliver scalable and elastic runtime environments on demand and host the execution of applications. These services are backed by a core middleware platform that is responsible for creating the abstract environment where applications are deployed and executed. It is the responsibility of the service provider to provide scalability and to manage fault tolerance, while users are requested to focus on the logic of the application developed by leveraging the provider’s APIs and libraries. This approach increases the
- 8. level of abstraction at which cloud computing is leveraged but also constrains the user in a more controlled environment. Platform-as-a-service (PaaS) refers to cloud computing services that supply an on-demand environment for developing, testing, delivering and managing software applications. PaaS is designed to make it easier for developers to quickly create web or mobile apps, without worrying about setting up or managing the underlying infrastructure of servers, storage, network and databases needed for development. 3) Software as a service (SaaS) At the top of the stack, Software-as-a-Service solutions provide applications and services on demand. Most of the common functionalities of desktop applications—such as office automation, document management, photo editing, and customer relationship management (CRM) software—are replicated on the provider’s infrastructure and made more scalable and accessible through a browser on demand. These applications are shared across multiple users whose interaction is isolated from the other users. The SaaS layer is also the area of social networking Websites, which leverage cloud-based infrastructures to sustain the load generated by their popularity Software-as-a-service (SaaS) is a method for delivering software applications over the Internet, on demand and typically on a subscription basis. With SaaS, cloud providers host and manage the software application and underlying infrastructure and handle any maintenance, like software upgrades and security patching. Users connect to the application over the Internet, usually with a web browser on their phone, tablet or PC. Each layer provides a different service to users. IaaS solutions are sought by users who want to leverage cloud computing from building dynamically scalable computing systems requiring a specific software stack. IaaS services are therefore used to develop scalable Websites or for background
- 9. processing. PaaS solutions provide scalable programming platforms for developing applications and are more appropriate when new systems have to be developed. SaaS solutions target mostly end users who want to benefit from the elastic scalability of the cloud without doing any software development, installation, configuration, and maintenance. This solution is appropriate when there are existing SaaS services that fit users needs (such as email, document management, CRM, etc.) and a minimum level of customization is needed. REFERENCES: 1- Book: Mastering Cloud Computing- Foundation and application program By Rajkumar Buyya, Christian Vecchiola, S. Thamarai Selvi 2- Other links: https://azure.microsoft.com/en-in/overview/what-is-cloud-computing/