Xuexuan Chen

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The inherent asymmetry of read and write speeds of flash memory poses great challenges for buffer management design. Most of existing flash-based buffer management policies adopt disk-oriented strategies by giving a specific priority to dirty pages, while not fully exploiting the characteristics of the flash memory. In this paper, we propose a novel buffer(More)
Flash solid-state drives (SSDs) provide much faster access to data compared with traditional hard disk drives (HDDs). The current price and performance of SSD suggest it can be adopted as a data buffer between main memory and HDD, and buffer management policy in such hybrid systems has attracted more and more interest from research community recently. In(More)
Flash solid-state drives (SSDs) provide much faster access to data compared with traditional hard disk drives (HDDs). The current price and performance of SSD suggest it can be adopted as a data buffer between main memory and HDD, and buffer management policy in such hybrid systems has attracted more and more interest from research community recently. In(More)
R-Tree structure is widely adopted as a general spatial index with the assumption that the deployed system is equipped with magnetic hard disk. While the application of SSD becomes more and more popular, traditional optimization of R-Tree structure on SSD is much less desirable than that on magnetic hard disk. Existing flash-aware index approaches employ(More)
Currently, the popularization of flash memory is still limited by its high price and low capacity. Thus, the magnetic disk and flash memory will coexist over a long period of time. How to design an effective flash-hard disk hybrid storage system emerges as a critical issue. Most of the existing works are designed based on traditional cache management(More)
Flash memory has been gaining more popularity as a substitution for magnetic disk. However, due to asymmetric IO latency, cache management policy needs to be reconsidered in systems equipped with flash. A novel buffer replacement approach named ACAR, which stands for Adaptive Cost Aware cache Replacement, is proposed in this paper to address this problem.(More)
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