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Flash Memory Shadow Paging Scheme for Portable Computers: Design and Performance Evaluation

机译:便携式计算机的闪存影子分页方案:设计和性能评估

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摘要

Recently, a flash memory has become a major database storage in building portable information devices because of its non-volatile, shock-resistant, power-economic nature, and fast access time for read operations. We propose a new scheme called flash memory shadow paging (FMSP) for efficient page management in a flash memory database environment. We improved traditional shadow paging schemes by reusing old data pages which are supposed to be disposed in the course of writing a new data page in the flash memory file systems. In order to reuse these data pages, we devised a deferred cleaning procedure and an operation interface which is geared to existing flash file systems. FMSP contributes to overcome the two drawbacks of traditional shadow paging schemes, additional space overhead and slow access caused by old page management. We also propose a simulation model to show the performance of FMSP. Based on the results of the performance evaluation, we conclude that FMSP scheme outperforms the traditional shadow paging schemes.
机译:近来,由于闪存的非易失性,抗冲击性,功率经济性以及用于读取操作的快速访问时间,其已成为建筑便携式信息设备中的主要数据库存储。我们提出了一种称为闪存影子分页(FMSP)的新方案,用于在闪存数据库环境中进行有效的页面管理。我们通过重用旧的数据页改进了传统的影子分页方案,这些旧的数据页应该在将新数据页写入闪存文件系统时被丢弃。为了重用这些数据页,我们设计了一个延迟的清理程序和一个适用于现有Flash文件系统的操作界面。 FMSP有助于克服传统影子分页方案的两个缺点,即额外的空间开销和旧页面管理所导致的缓慢访问。我们还提出了一个仿真模型来展示FMSP的性能。基于性能评估的结果,我们得出结论,FMSP方案优于传统的影子寻呼方案。

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