Data Processing of Consistency Service in Cloud Computing

The cloud service provider is a key-value data storage system, where each piece of data is identified by a unique key. A cloud service provider maintains multiple replicas for each piece of data distributed servers. To provide always-on services, the cloud service provider replicates all of the data on multiple geographically distributed cloud servers. A cloud consists of a group of users that cooperation a job. Consistency as a service model, which consists of a large data cloud and multiple small audit clouds. The load rebalancing task to storage nodes by having the storage nodes balance their loads spontaneously. The outsourcing to data cloud, the audit cloud and the data cloud will engage in a service level agreement, which promised level of consistency that should be provided by the data cloud. This eliminates the dependence on central nodes. The outsourced data will be splitted based on the storage servers parameters and the splitted data will be stored on different servers. High consistency implies high cost and reduced availability. The implementation of the data cloud is opaque to all users due to the virtualization technique.