International Journal of Computer Applications (0975 – 8887) Volume 108 – No. 4, December 2014 29 Evaluating the Failures of Data Centers in Cloud Computing Preeti Gupta Chaahat Gupta CSE Deptt. CSE, Deptt. MIET, Jammu MIET, Jammu ABSTRACT This letter presents a study on the various features of the cloud computing its models and services. Cloud computing has become the newest concern in IT world to provide various services via internet computing. Thus cloud computing is based on the internet based computing where indispensable collective servers offers software, infrastructure, platform, storage and other resources and presents to customers on a pay-as-you-use foundation. The overall objective of this work is to evaluate the various failures of the cloud data centers. To achieve the objectives a review has been conducted on the various research papers and the various failures has been presented. Index Terms CLOUDS, PAY AS YOU GO, XaaS, ON-DEMAND. 1. INTRODUCTION Cloud computing is one of the fieriest, growing technology in the IT world. Cloud computing [1], [2], [3] is currently emerging as a powerful way to transform the IT industry to build and deploy custom applications. The word cloud is similar to the Internet. But in real cloud computing model, it means to have all the software and data held on a server or a group of servers, and to access them through the internet. In certain cases the client is a device furnished with a nominal OS and running a web browser. Users have facility to use these services existing on the cloud without the knowledge of managing of the resources is done. Thus the users can only focus on their processing rather than wasting time and attaining knowledge on the resources needed to cope up their processes [2]. To view cloud computing is to believe of the email account. To access the account, open the browser, go to the email client and simply log-in and the important part is having the Internet access. The email account is not housed i.e. the whole of the Yahoo or Gmail software is not installed on the computer instead it is accessed by the Internet connection [2]. “Cloud” is the aggregation of Servers, Low end computers and storage hosting the program and data, Accessed via Internet anywhere from world [4] [5] [6]. Figure 1: Cloud computing 1.1 Cloud Computing Characteristics 1.1.1 On-Demand A fundamental thought of the cloud computing is to convey the resources at whatever point there is need. From the client's perspective the accessible registering resources are almost boundless i.e., the client does not think about the set of servers placed at one site therefore it is the obligation of the distributed computing supplier to have satisfactory resources to satisfy the solicitations of all their clients. Utilizing processing resources on-interest is a standout amongst the most favored capabilities for a substantial number of endeavors on the grounds that it uproots the requirement for arranging forward, getting, and settling the resources they may require sooner or later. This permits the client to forestall making an unnecessary financing in servers. 1.1.2 Pay-per-Use In case of cloud computing, the person pays only for the usage whereas in the case of the traditional computing there is a need to locate the resources physically on the side of the customer. The cloud computing provides the ability of paying the service provider depending only on the use of the customer. Figure 2: Cloud computing working 1.1.3 Rapid Elasticity The cloud supplier scales up or down the resources relying on the particular of an administration level understanding that are accommodated the changing client needs. This administration characterizes the time for the cloud supplier to reaction back. Such an agreement is needed by the cloud supplier, on the grounds that the cloud supplier does not indeed have innumerable resources, so relying on the administration level understanding the supplier need to run across a set of disseminations of resources that satisfy the requests of their clients generally the administration level assention oblige a punishment that the supplier need to pay to every client for not meeting the understanding.