Advanced It Outsourcing by Using Cloud Computing Model

Cloud computing was a completely new term a short 9 years ago, in 2007. The basis of this technology is to move the workload of IT activities away from an organization, and to one or more third parties that have resources dedicated to processing such things. These can be, but are not limited to, networking, storage, software systems, and applications. Rather than having to create and maintain their own expensive datacenters, companies can pay a fee to use someone else’s. This makes growing businesses extremely flexible, as they can easily gain or remove storage space per their needs. Being able to purchase the use of online storage space is known as “hardware as a service,” or, more simply, “virtualization.” Being able to purchase the use of online software is known as “software as a service.” Both are very powerful tools that allow the minimization of a company’s IT budget.

The national Institute of Standards and Technology under the department of Commerce defines Cloud Computing as “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”. Another definition for cloud computing is a term used to describe a network of computers that deliver information technology

Furthermore, grid computing needs a sophisticated infrastructure: small servers, quick connections between the servers and at last, so as to maximize the potential of that infrastructure, it needs the utilization of quality tools, software system and skilled technicians to manage the grid. In different words, once of these elements are place along, it's obvious that this technology is

The word "cloud" is used to represent the internet and other communications systems. Cloud computing is the result of an evolution of the widespread adoption of virtualization, service-oriented architecture, autonomic, and utility computing in the past, telecommunications companies mainly gave simply dedicated, point-to-point data circuits to their users. Starting from the 1990's, virtual private network services was included in their contributions. It made the telecommunication companies offer equally improved services whereby cutting down on cost as well as using resources effectively.

One section is referred to the public cloud in which it can be used as a pay as you go service (Armbrust et al., 2010). The private cloud is the second section. This is in reference to the enormous data centers in use by organizations and private businesses. These businesses will see the most benefit from using cloud technology. Furthermore, people involved in cloud computing can be organized into two groups as well; the cloud providers and the cloud user’s. The cloud user’s take resources from the cloud and utilize data storage. Cloud providers house the hardware or equipment for the cloud and also manage it.

The cloud aims to cut costs, and help the users focus on their core business instead of being impeded by IT obstacles Cloud computing is so named because the information being accessed is found in the "clouds", and does not require a user to be in a specific place to gain access to it. The services are offered from data centres all over the world, which collectively are referred to as the "cloud." The idea of the "cloud" is to simplify the huge network connections and computer systems involved in online services. Cloud computing is a computing model, not a technology. In this model of computing, all the servers, networks, applications and other elements related to data centres are made available to IT and end users. Cloud computing is a type of computing that is comparable to grid computing. It relies on sharing computing resources rather than having local servers or personal devices to handle applications.

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 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]

Public cloud service is a service that is open to anyone who has access to Internet is a potential user. Public cloud service can be further divided into application, platform and infrastructure. Software as service (SAAS) “transfer programs to millions of users through browser. In the user 's views, this can save some cost on servers and software. In the provider 's views, they only need to maintain one program, this can also save cost” (Wang, June 2011). Google Apps and Zoho offices

The term cloud computing encompasses allot of areas of technology. It also includes new ventures such as hardware service, a way to manage storage and server load on demand from Amazon and others. What all these cloud computing services do in common, though, is that they are all delivered over the Internet from massive data centers (Kroenke, 2013, King, 2008, Wardley, 2012, Hinchcliffe, 2014).

Public cloud: cloud computing model whereby a cloud service provider provision resources over the internet such as software and data storage, which clients can access through the web browser.

A cloud is a type of parallel and distributed system consisting of a collection of inter-connected and virtualized computers that are dynamically provisioned and presented as one or more unified computing resource(s) based on service-level agreements established through negotiation between the service provider and consumers. The term ‘cloud’ first referred mainly to large ATM networks. Cloud computing began in earnest with the advent of Amazon’s web-based services. Yahoo, Google, IBM, Microsoft, Sun, Intel, Oracle, SAS, and Adobe followed to offer cloud computing technologies.

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 used to connect ‘n’ number of computers to a single network and gaining different level of access across the world. It is used to reduce the IT infrastructure because it provides different type of services like servers, storage, databases, networking, software, analytics, and so on over the Cloud Computing. In present world we have different type of cloud computing like Amazon Web Services, IBM, and Salesforce etc. with different specifications which are required to others. Each service has its once implementation techniques to provide user friendly accessible.

These private environments are made accessible via the Internet. Cloud computing provides services such as software (applications), platforms and infrastructures with a subscription-based in a pay-as-you-go model. These services are generally referred as Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS).