期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2014
卷号：13
期号：3
页码：143-147
出版社：Seventh Sense Research Group
摘要：The cloud computing pattern has gained widespread adoption in recent years. It was success due to large to customers’ ability to utilize the responsibilities as per requirement with a payasyou go worth model, which has confirmed as acceptable in many aspects. Less expenditure and max flexibility make progress around to the cloud convincing. In spite of its obvious flexibilities, though, a lot companies pause to shift to the cloud mostly cause of concerns associated to service accessibility, data lockin, and legal doubts.1 Lock in is particularly difficult. For a single thing, any have public cloud accessibility is normally max, outages still forms .2 Businesses hooked up with a cloud are essentially make to wait till the cloud network starts .how ever cloud providing company’s generally don’t assure any particular service kind of agreements (SLAs)3 — that is, businesses hooked up with cloud have no worthy that it will continue to provide the minimum requirement of QoS (quality service). At last, the majority of public cloud providers’ provisions of service let that provider might change the cost of cloud. Hence, a business attached with a cloud has no long or midterm control over its own IT expenses. At the beginning of all these problems, we can check out for businesses to permanently keep an eye on the cloud they’re utilizing and capable to hurriedly “change horses” — that is, drift to a different cloud if they found problems or if their estimate guess the future issues.
