Computing Of The Future : Cloud Computing

Cloud computing is one of the fastest growing segment of Information technology today. In simple words cloud computing means storing and accessing data and programs over the internet instead on the computer's hard drive which can be accessed from any part of the world if the individual are connected to the internet or a network connection is available 24/7. A simple example of cloud computing is g-mail. With the connection of internet through any medium we can send and receive emails.

Cloud computing allows a user to store and access data and programs over the internet instead on their computer hardware (Griffith, 2015). The user is then able to access from anywhere or any internet-enabled device. There are three categories of service in cloud computing: SaaS stands for Software as a Service; IaaS is Infrastructure as a Service; and PaaS is Platform as a Service. Until recently, most users stored and accessed their programs via their hard drive, also known as local storage. What began as an alternative delivery system is swiftly becoming a way for Enterprises to reduce their IT spending while still providing multiple applications to various users. If a service has the following

Cloud computing has been defined by NIST as a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or cloud provider interaction. Cloud computing can be considered a new computing paradigm insofar as it allows the utilization of a computing infrastructure at one or more levels of abstraction, as an on-demand service made available over the Internet or other computer network.

Cloud computing, in its most basic form, is “using computer services [such as computer and data storage, management and processing] that are delivered over a network” (Kim & Solomon, 2013, p. 189). For example, an organization may require a great deal of storage for their data but may not want to purchase the servers, the physical space for the servers, or the personnel to manage the infrastructure. Instead, they take advantage of the many cloud computing options and outsource their needs, hiring someone to do everything off-site usually with the goal of reducing their overall cost of ownership. As defined by the National Institute of Standards and Technology (NIST), cloud computing has five essential characteristics, three service models, and four deployment models (Mell & Grance, 2011) which will be covered, briefly, in the next few sections.

Cloud computing is an advanced computing technology based on the Internet environment to share the computing resources. Cloud computing refers to the services and applications delivered via Internet and also refers to hardware and software in the datacenters that provide those services. Cloud computing model has five characters, three service models, and three deployment models [1].

requirements, and pay only for the services they use. However, despite all cloud benefits there

Cloud computing is ultimately transforming today’s computing landscape. Cloud has enabled enterprises to expand its infrastructure, enabling capacity on demand and outsourcing- Infrastructure now has greater flexibility, resulting in significant savings,

Over the past several years, cloud computing has been getting attention as a new computing model for providing flexible and on-demand infrastructures, platforms, and software as services. Cloud computing is a technology through exchange of information and software management. Cloud computing allows users to use computer technology without the installation in their computers. It allows users to access their files or data from any computer having an internet connection. Cloud computing provides more efficient computing by centralizing data storage, processing and bandwidth. This technology emphases on virtualization of the host server or the controlling computer. The server acts as a communication network through which information could be shared. The information can be stored, retrieved and shared as and when required through a widespread global platform.

Cloud computing is the growing method of computing adopted by many organizations nowadays around the world. The word ‘cloud’ refers to the network, the servers providing the cloud services can be located anywhere in the world (Garg & Buyya, 2012). The services are provided through internet and made available to the end users. Several definitions are given for the cloud computing in the literature. According to (Mell & Grance, 2011), “Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This Cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models.” Different advantages of having cloud computing includes, services are available on demand, the users have to pay only as per the use and the services are accessible from anywhere as it is available over network. There are different service models and deployment models available for cloud computing.

How exciting and wonderful it would be if the computer were nothing more than an Internet browser “a digital window pane on the web.” Imagine being able to access all of your personal data at any given moment. Imagine having the ability to organize and mine data from any online source. Imagine being able to share that data—photos, movies, contacts, e-mail, documents, etc.—with your friends, family, and coworkers in an instant. This is what cloud computing promises to deliver. Cloud computing can broadly be described as on-demand computing, for anyone with an Internet connection. Access to applications and data anywhere, anytime and from any device is the potential outcome of this emerging technology. At its most basic level, the "cloud" is simply the Internet, or the vast array of servers around the world that comprise it. Whether one realizes it or not, we have all been using cloud-based services. Pretty much everyone with a computer has been. Web-based email programs, like Yahoo or Hotmail, are familiar examples of cloud-based applications. These programs live on servers, not on one’s PC, and one can access them through a Web browser.

Cloud computing, as defined by wikipedia, creates a virtual computer, which is anonymous and is networked to a series of servers across the globe, known as the “cloud”. The “cloud” harnesses underutilized processing power of all computers in a network, to create supercomputing power . By connecting networks of large groups of servers, that run low cost consumer PC technology, a shared IT infrastructure (the “cloud”) is created. Thus rather than storing applications, databases, emails and file services on a personal computer or server, a business or an individual can store in the “cloud”. In cloud computing the user rents server space or access to software from a cloud service provider and connects over the internet. There are four models of cloud computing. Firstly, a private cloud where services and infrastructure are maintained and managed by the customer/user. Secondly, a community cloud whereby several organisations share access to a private cloud. Thirdly, a public cloud where services are stored off site and accessed over the internet. The storage is managed by an external organisation like Google or Microsoft. Finally, the hybrid cloud which uses both private and public cloud models. Cloud services include SaaS (software as a service) where the vendor uses the web to deliver applications; cloud platform services (PaaS) to develop or customise cloud components of software; cloud infrastructure services (Iaas) which are self serve models for managing remote data

Cloud as the term signifies means the computers in a network to be used for data storage remotely and for maintenance. The cloud computing offers reductions in costs and also has increased scalability, reliability and flexibility in its own processes, and is considered as todays one of the most exciting technologies and has seen a rapid growth over the past ten years. The Cloud computing uses advanced level of computational

Cloud computing enables companies to consume compute resources as a utility -- just like electricity -- rather than having to build and maintain computing infrastructures in-house.

The explanation of “cloud computing” from the National Institute of Standards and Technology (NIST) [2] is that cloud computing enables omnipresent, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. According to the explanation, cloud computing

Cloud computing is an internet based computing that depends on sharing computing with other resources rather than local servers or personal devices to handle applications. Cloud computing has fundamentally changed the way people view computing resources; rather than being an important capital consideration (Navavati, M., Colp, P., Aiello, B., & Warefield, A. (2014)). Cloud computing offers many potential benefits to organizations by making information technology (IT) services available as a commodity. IT services are services provided by IT service provider. Such services includes storing, retrieving, transmitting, and manipulating data for businesses or organizations.