Lifetime Management of Flash-Based SSDs Using Recovery-Aware Dynamic Throttling

Provided by: Seoul metropolitan government
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NAND flash-based Solid-State Drives (SSDs) are increasingly popular in enterprise server systems because of their advantages over hard disk drives such as higher performance and lower power consumption. However, the limited and unpredictable lifetime of SSDs remains to be a serious obstacle to wider adoption of SSDs in enterprise systems. In this paper, the authors propose a novel recovery-aware dynamic throttling technique, called READY, which guarantees the SSD lifetime required by the enterprise market while exploiting the self-recovery effect of floating-gate transistors. Unlike a static throttling technique, the proposed technique makes throttling decisions dynamically based on the predicted future write demand of a workload so that the required SSD lifetime can be guaranteed with less performance degradation.

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