Concurrency control algorithms for deduplicated cloud storage

摘要

Concurrency control algorithms for deduplicated cloud storage Authors: PRABAVATHY BALASUNDARAM, CHITRA BABU Abstract: Deduplication of data is essential to effectively use cloud storage. As the metadata in deduplicated cloud storage are shared across multiple users, concurrent updates may result in inconsistencies. A coarse-grained locking strategy that has been proposed earlier to overcome this difficulty is not suited for inline deduplication owing to poor performance. In the present work, a fine-grained locking strategy that overcomes this shortcoming is proposed. A metadata structure along with a set of concurrent control mechanisms to accomplish this is presented. This strategy is shown to improve the throughput by as much as 60% with only marginal lock overhead. Keywords: Cloud storage, data deduplication, concurrency issues, locking Full Text: PDF.