Towards Finding Unreliability in Cloud Systems: Real Facts and Calculations
Vishwas Dixit, Abhishek Sharma · 2014
XaaS is a potentially game-changing technology that could reshape IT. In cloud computing every cloud is different, offering different services, different SLA, different charging models etc. Situation is difficult when if one can require real reliability, it should write more reliable applications. In IT field reliability of cloud computing has currently been an emerging topic. This is attractive to enterprises for business continuity and disaster recovery reasons. User expectations and demand are the major concerns in the design of a system. If the service provider cannot provide the QoS according to the demand of a user, the user can reject their service and will go to another service provider. Performance requirements of Cloud applications and services must be well planned to utilize from the cloud. In a true market-based economy, an application designer is able to select the provider of the goods he/she needs based on a combination of SMI related to cost, quality and so on. This means that a designer should be able to compare and rank the cloud services and select one of the most profitable (according to some user defined measures and user based experience). The key consideration like reliability for ranking cloud services will be highlighted throughout this paper, in addition to strategies for designing cloud applications. Consideration of reliability is critical since they affect the flow of data throughout the cloud, control of failover, trust over the services and user experience.