Hala Alotaibi
Dr. Kevin Lillis

Cloud computing

       Cloud computing latest major shift in ideas and applications related to information technology services, especially with regard to infrastructure solutions that rely on institutions to facilitate their operations, and found a lot of institutions, large and small enlist in this new system and predicted a recent study for the Foundation IDC Global specialized in research that Cloud computing provides additional revenue for the institutions of more than a trillion dollars by 2014.
•	Definition
         Technology is based on the transfer and processing of computer storage space to the so-called cloud, a device server to be accessed via the Internet, and this turn of information technology software products to services. Thus, this technology contributes to the problems of clearing the maintenance and development of software for information technology companies have used, and thus concentrated effort of the beneficiaries to use these services only. And rely infrastructure cloud computing data centers that offer advanced and large storage spaces for users as they provide some of the programs as a service to users, and relies on the capabilities provided by Web 2.0 technologies. 


•	cloud computing model is based on the following basic classes:
1.	Providing software as a service (SAAS) :layer of cloud computing and more interested in relating to end-user applications such as e-mail systems, customer relationship management applications, common software and systems management workflow.
2.	 Provide software platforms as a service (PAAS) : a layer of cloud computing consists mainly of libraries, programs and intermediates, and updates the runtime and tools needed by developers in updating the software application as a service. The benefit of the technology platform as a service layer in virtual environments "infrastructure as a service" to deploy and provide software developed sources in virtual infrastructure as a service.
3.	 The "infrastructure as a service"(IAAS): they provide the infrastructure for computer, and instead of buying servers, software, data center space or a private network equipment customers purchased these sources as a service completely independent. The service description is usually on the basis of utility computing and how the sources used and thus the cost, which will necessarily reflected on the level of activity. The use of cloud computing technology of virtual computing (Virtualization Technology) extensively in the model "infrastructure as a service" of their own as it helps to provide energy, cost, and space in data centers, default is what is considered a cornerstone in the structure of the cloud.
•	the beneficiaries of cloud computing 
       the small and medium enterprises more beneficiaries of this new technology, as well as large companies because they will work the system the Out- sourcing, which designed its model of computing allows them to optimize the use of infrastructure, and to achieve the desired objectives, and thus will be redundant then for creativity at work to be able to deal with new technology.
?	Cloud computing is also an integral part of the industry, data centers and therefore the information will help to rationalize the consumption of thermal energy related emissions, where he became the main challenge for those in charge of accounting at the company's resources on how to reduce the time.
?	 It is also cloud computing is one of the most prominent new phenomena in the world, a way of innovative and intelligent to provide services and applications in a simple and moving, it is also a panacea to counter the negative effects of the economic crisis that plagued all countries and sectors since the beginning of 2009 and shows that clear in cost savings Finance not inconsistent with the efficient functioning of the applications and solutions, and at the level of software products, and hard-ware. It also achieved significant savings of up to 70% which is the percentage allocated in any company for the operating system, or the so-called Operation-System also contribute to cloud computing to cut an estimated 40 to 60% of the budget of any company dedicated to the telecom sector and information technology.
•	First, the positives
The main importance in the following points
A.	Cost: low in terms of reducing the purchase price of the equipment, and change the license application system where service has been made on the basis of subscribing to it.
B.	Scalability and Availability: where have the services and the sites hosted on the cloud host provider to cloud the possibility of determining the scope at which demand is always available to users.
C.	 No limits of computing and storage: there are no limits for storage and processing on the cloud theory, but there are some obstacles in practice.
D.	Focus on the core business rather than IT: where business owners need to focus on their core mission rather than trying to address the management of information technology.
E.	Provide resources in a more dynamic: they provide users with the computing resources they need at any time and in a dynamic way.
F.	More Efficient: It does not matter whereabouts of your equipment is the most important thing that operate well and that the service will be available.
G.	 IT-friendly environment (Green IT): cloud computing and virtual environment in general play an important role and effectively in the development of the movement of "Green IT", the technology is green and cloud computing were closely linked, as the technology of cloud computing is the technology Virtual and works to reduce the number of machinery and equipment used and thus reflected on green technology because it also helps in saving energy.

•	Second: the negatives
And are summarized in the following points
A.	Security: you information are important exist on the Internet, can be trusted storage? If the number of terrorists attacked a number of clouds computing what will be the fate of your business?
B.	Privacy and data ownership: Is your applications are not ready to deal with after the cloud and need to be some adjustments to adapt to the cloud environment.
C.	To ensure the level of service: Is it provides this service is always? What about service level agreements? What about connecting to the network and site access servers and various services on the cloud?
D.	Joint work and integration of services between the clouds: Is there a possibility to move from a vendor service for another without having to change the texts and the environment in which I work? Can not demonstrate compliance or revised after. We will have a major effort to deploy applications on the cloud to conform with the work of compliance, such as "H, but any AA, S or X (HIPAA, SOX etc.) ... Etc".
E.	There is also a cloud Gurmerih and extremely dangerous spread continuously and steadily around the whole world, with the transfer of data storage digital with hard drives on computers to a system of cloud computing and storage on the Internet has increased the amount of waste digital wasted dramatically during the last decade, and includes such wastes digital e-mails The photos and video clips and music that are stored on the Internet without a real need her, and without re-used again.
•	The challenges
     The challenges that hinder the spread of cloud computing including environment of cloud involves many challenges and gaps several security can not be for security solutions conventional face, as I mentioned earlier that security is the first concern of the challenges or issues troubling when talking about cloud computing, but it has developed a "Otrend Maekerob" package integrated security solutions and advanced Trend Micro Secure Cloud to provide protection to remove such concerns as the challenge of this new package of security risks, and concerns related to privacy and interoperability at the dissemination of information in the cloud computing environment. Today, after taking determined parameters of cloud computing, and companies began to store massive amounts of data in the institutional environment of cloud become imperative for the development of security solutions to protect data and enhance the standards of control.
•	Threats
      The benefits of cloud computing looks fantastic, especially for those who have serious reservations about the ability of a group of information technology to meet their business needs. Indeed, the strategy is to resume public cloud service is necessary, such as outsourcing. However, it is not considered outsourcing fully smart move, as I learned many institutions during the period following the online business management. When any user can holds a credit card to buy the services they want, the problem becomes even worse.
So be aware of the following. 
i.	Some information managers feeling threatened:
Threaten to deliberate on computing service cloud causing a significant impact in reducing the number of servers and resources team work. For the information of those managers who development positions during their career in technology management, rob cloud service mainly management technology, which lets information managers are wondering about their role. But it represents an opportunity for information managers to pour their attention on strategy and not on the technology.
Focusing on the strategic director of information requires the development of a whole new set of skills, and it must be put into consideration when moving to cloud computing. Certainly there are many aspiring information managers who look at existing services on the cloud service as an opportunity because it allows flexibility and cost savings.