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Write amplification is a critical factor that limits the stable performance of flash-based storage systems. To reduce write amplification, this paper presents a new technique that cooperatively manages data in flash storage and nonvolatile memory (NVM). Our scheme basically considers NVM as the cache of flash storage, but allows the original data in flash storage to be invalidated if there is a cached...
According to the recent studies on the smartphone performance analysis, the primary performance bottleneck of smartphones is storage systems rather than wireless networks or processors. The key reason behind this undesirable result is the journaling function of a lightweight database library used by various smartphone applications. This paper quantifies the overhead of journaling on the performance...
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