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QLRU: NCQ-aware write buffer management algorithm for SSDs

QLRU: NCQ-aware write buffer management algorithm for SSDs

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A novel management scheme for the write buffer in solid-state drives (SSDs) is presented. The proposed scheme exploits the future buffer reference pattern by using I/O commands information in native command queuing (NCQ) of SATA SSDs. Through the trace-driven simulations, it is shown that the proposed scheme improves the performance of the write buffer significantly in terms of several metrics including the hit ratio.

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