Copy Of The Data Management Strategy. Cloud Storage Environment

With the rapid development of Internet technology, the Internet data is walking towards us such as tsunami, which directly maps that the human relatively lacks the ability to deal with data.Cloud storage with a simple "on-demand"model provides users with a low-cost and high reliability of data and applications which is online storage service.Data replica management is an important component of each storage system.It is more important for cloud storage,which has the features of high reliability, versatility, scalability,large storage and so on. But the theory of the data replica management in cloud storage system is still in the initial stage.There are many issues that is worthy of further study. A reasonable amount of data copies can reduce network latency and bandwidth consumption when we access the remote data and can also increase the network load balancing. At the same time is can improve data security,reliability and system fault tolerance, etc. And the worthy of data replica management is an important aspect to improve the quality of cloud service Qos.In order to improve the quality of cloud storage services, this paper studys in three aspects. They are the copy controlling strategy, replicas creation strategies and replicas deletion strategies. The main innovations are as follows.(1) This paper proposes replicas creation strategies based double bind and replicas deletion strategiess based double bind. And it has detailed analysised the constraint criteria:the standard of ailability and the standard of access to the frequency, giving both the algorithm description.(2) This paper has analyzed and summarized the research status of replicas selection strategies, has putted forward my own replicas selection strategies based on Grey selection strategy after analysising the basis of replicas selection strategies,and has derived the prediction equation of data copy.(3) Replicas consistency strategies ia an important aspect of ensureing the data available.After Analyzing and summarizing relevant academic research,this paper has proposed the replicas consistency strategies based on optimization data copy chain, has created the replicas chain and maintenanced the replicas chain,and has analysised the process of maintenancing replicas chain.