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This paper proposes a replication cost model and two greedy algorithms, named GS QoS and GS QoS C1, for replication placements in cloud-based storage systems. The model aims to minimize replication cost with full consideration of quality of user access to storage nodes. Our two algorithms employ a utility measurement to guide placement procedures. Our final experimental results show that 1) GS QoS...
To get large disk-like characteristics and offset the significant power demands of hard disk drives, we propose a fully functional hybrid archive system (called Pseudodisk) composed of an array of disks and a tape library. To get an energy conservation, low cost archive system, Pseudodisk uses data value model and utility function to guild data management. Two novel algorithms are proposed for data...
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