International Journal of Engineering Sciences & Research Technology (IJESRT)
Now-a-days, due to advantages cloud storage services become popular. Multiple replicas are stored over a wide range of geographically distributed cloud servers in order to provide always-on access service. The main drawback of such a replication technique is that it requires a high cost to achieve a strong consistency and most of the cloud server's memory is wasted. The authors are proposing Consistency-as-a-Service model (CaaS) consisting of data cloud maintained by Cloud Service Provider (CSP) and audit cloud, also implementing a two-level auditing structure.