Eventual consistency: How soon is eventual? An evaluation of Amazon S3's consistency behavior
Proceedings of the 6th Workshop on Middleware for Service Oriented Computing
An approach for constructing private storage services as a unified fault-tolerant system
Journal of Systems and Software
Scalable service-oriented replication with flexible consistency guarantee in the cloud
Information Sciences: an International Journal
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Cost and scalability benefits of Cloud storage services are apparent. However, selecting a single storage service provider limits availability and scalability to the selected provider and may further cause a vendor lock-in effect. In this paper, we present MetaStorage, a federated Cloud storage system that can integrate diverse Cloud storage providers. MetaStorage is a highly available and scalable distributed hash table that replicates data on top of diverse storage services. MetaStorage reuses mechanisms from Amazon's Dynamo for cross-provider replication and hence introduces a novel approach to manage consistency-latency tradeoffs by extending the traditional quorum (N,R,W) configurations to an (N_P,R,W) scheme that includes different providers as an additional dimension. With MetaStorage, new means to control consistency-latency tradeoffs are introduced.