State Of The Art : Cloud Computing

The focus of cloud computing is providing with scalable and a cheap on-demand computing infrastructure with a good quality of service levels. The process of the cloud computing involves a set of network enabled services that can be accessed in a simple and general way. Cloud computing provides with a unique value proposition for any organization to outsource their information and communication technology infrastructure. Moreover, the concept itself provides with a value proposition for an organization as using the cloud saves on cost, resources, and staff, and business opportunities for the organization (Katzan). An extensive connectivity of

| Cloud computing is considered to be a new computing paradigm where applications, data and Information Technology services are provided over the internet. A very important factor is cloud computing research is task management which plays a key role in ensuring an efficient system. Task scheduling problems are premier considerations which relate to the efficiency

In the course of recent years, rise of Cloud Computing has strikingly made an advancement in the IT business. Distributed computing is of developing enthusiasm to organizations all through the world, yet there are numerous obstructions connected with its appropriation which ought to be dispensed with.

Cloud computing represents the next generation in the future of web enabled IT capabilities. Many major vendors such as Google, Amazon, Microsoft, IBM, HP, and others now offer business solutions through the cloud as well as the iCloud provided by Apple and targeted to consumers. Although most of these products are offered as software as a service, the cloud as now consists of expanded capabilities that include items such as infrastructure as a service. One of the most successful versions of this technology has been provided by Amazon's Web Services (AWS) and other solutions from Amazon. This paper gives a brief overview of some of the latest developments regarding the scalability, manageability, and adaptability of some of these technologies.

Cloud computing is a one of the most talked of topics in the field of Information Technology in recent times (Keyun, Joe, Taha, & Ibrahim, 2013). This subject area of cloud computing basically is a term used to describe computer resources available as a service accessible over a network (Darren & Kim-Kwang, 2013). The National Institute of Standards and Technology (NIST) define cloud computing as a model for enabling ubiquitous, convenient, on-demand network access on 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 (Peter & Timothy, 2011). Due to the attractive nature of the model there has been rise in the use of cloud computing. Gartner, an IT research and consulting firm, says that cloud computing is growing will become the bulk of IT spend by 2016 (Gartner, 2013).

Cloud computing is a model for enabling ubiquitous, 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. (Reference: http://www.nist.gov/itl/cloud/)

The Important of Cloud Computing is increasing and it is receiving a growing attention in Scientific & Industrial Communities. Cloud computing is one of the top 10 most important technologies and has a greater possibility in successive years by companies and organizations. Cloud computing implement everywhere, favourable, on demand network access to a shared pool of configurable computing resources (e.g. networks, servers, storage, applications and servers) that can be immediately supply and released with minimal management effort.

Cloud computing has evolved with the passage of time and has revolutionized the entire ICT industry. Cloud computing is categorized into two forms Service oriented computing and Grid Computing. Service oriented Computing is an transpiring paradigm that has revamped the consumption of software and related product all around the globe. The core functionalities that service oriented computing provide is elements and that are independent of platforms and are programmed using standard protocols to support distributed computing across various organizations. [2]

With the rapid development of processing and storage technologies and the success of the Internet, computing resources have become cheaper, more powerful and more ubiquitously available than ever before. This technological trend has enabled the realization of a new computing model called cloud computing, in which resources (e.g., CPU and storage) are provided as general utilities that can be leased and released by users through the Internet in an on-demand fashion. In a cloud computing environment, the traditional role of service provider is divided into two: the infrastructure providers who manage cloud platforms and lease resources according to a usage-based pricing model, and service providers, who rent resources from one or many infrastructure providers to serve the end users. The emergence of cloud computing has made a tremendous impact on the Information Technology (IT) industry over the past few years, where large companies such as Google, Amazon and Microsoft strive to provide more powerful, reliable and cost-efficient cloud platforms, and business enterprises seek to reshape their business models to gain benefit from this new paradigm. Indeed, cloud computing provides several compelling features that make it attractive to business owners, as shown below.

For cloud computing systems to function optimally, the individual components of the network of computing resources must function optimally. Thus, the importance of keeping track of the performance of these components is apparent. In addition to this, the providers of the cloud service need to

In the ever-changing world of business communication, the demand for instantaneous information has given rise to a new market, focused exclusively on the creation and advancement of dynamic network systems that bring millions of individuals and businesses together through an interconnected system of servers known as “the cloud”. As defined by IBM, cloud computing is the delivery of on-demand computing resources over the internet on a pay-for-use basis. This concept allows companies to harness incredible amounts of processing power, power that was inconceivable a mere decade ago. As more and more companies have adopted and integrated these systems of cloud computing into their business

The cloud needs certain sets of characteristics to enable the remote provisioning of scalable and measured resources in an effective manner. [3]

Grid computing is a term that if often mistaken for cloud computing, however they are very different. Grid Computing can be described as a platform that concentrates the resources of multitudinous computers in a network in order to tackle a particular problem concurrently. (T.Velte, Velte Elsenpeter 2010) and It is often used to solve problems of a scientific or specialised nature. "Grid Computing necessitates the use of software that can divide and then send out pieces of the program to thousands of computers. It can be done throughout the computers of an organisation, or it can be done as a form of public collaboration". (T.Velte, Velte Elsenpeter 2010, p.8) Grid Computing is an advantageous step for any company to take as it is a cost-effective way of using a given amount of computer resources. In addition it is a good way of manoeuvring problems that need a colossal amount of computing function and resources of several

Cloud computing is large group of remote servers which are networked for facilitating pervasive, expedient, on-demand network access to configurable and common computing resources such as CPU processing, network bandwidth, disk space that can be quickly facilitated and reclaimed with minimum central management. The underlying complexity of such a system is handled by an Operating System which is designed to support interoperability, scalability, security, user privacy, data management, fault tolerance. These operating systems need to work proficiently in the background to ensure that all the resources are available when needed and ensure acceptable performance and quality of service.

The use of cloud computing, in which information is being stored and shared across the world, is growing at a rapid pace. To further help conceptualize this process, the cloud has also been described as something similar to a shared, pay-as-you-use public utility supplying water to a community.