DMS: A Dynamic Multi-tiered Storage with deduplication based on variable-sized chunks

It's known that multi-tiered storage has grown up to be a viable solution today for storage systems which combines the advantages of high capacity, quick access and low cost together. In this paper, we propose Dynamic Multi-tiered Storage (DMS), which efficiently combines multi-tiered storage and deduplication based on variable-sized chunks. DMS has a high Data Elimination Ratio (DER), optimizing the storage performance of Multi-tiered storage with data elimination. We also present and implement the Dynamic Adaptive Replacement Cache (D-ARC) which bears the merits of higher efficiency, scalability, compatibility. By comparing with ARC, D-ARC reduces the average access time by 8.7%, and increases the average hit rate by 9.3%.