期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2014
卷号：5
期号：5
页码：6184-6192
出版社：TechScience Publications
摘要：In these recent years cloud computing paradigm has achieved widespread adoption. Its success is because of large customers’ ability to use services on demand with a payas- you go pricing model. Low costs and high flexibility make migrating to the cloud computing. Although having advantages, many companies hesitated to move to the cloud mainly because of conflicts related to the service facing the availability, data lock-in and legal consequences. Lock in is made as issue. But, even though public cloud availability is high, outages still occur as Businesses locked into such a cloud are essentially at a standstill. Moreover, these cloud providers generally don’t guarantee respective service level agreements (SLAs), so, businesses locked into a cloud where no guarantees that it will continue to provide the required quality of service (QoS). Finally, most public cloud providers’ terms of service let that provider may change pricing at any time. Hence, a business can be locks into a cloud has no mid- or long term control over its own IT costs. At the level of all these problems, identify a need for businesses to monitor permanently the cloud they’re using migrate to a different cloud if they discover problems or if their estimates predict future issues.
关键词：Cloud Computing; Meta-Cloud; Cloud Migration;Cloud Service Providers
