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Application-aware deduplication for performance improvement of flash memory

机译:应用感知重复数据删除技术可提高闪存性能

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摘要

Deduplication in flash memory improves performance as well as reliability thanks to mitigating drawbacks of flash memory, which is done by eliminating duplicate data from flash memory. However, existing works mainly focus on efficiency of runtime data management without considering program flows. We propose a new application-aware deduplication method called unmodified region detection (URD) for flash memory. URD reconstructs loop blocks of an application program to avoid duplicate update operations, which aims to reduce the size of in-place updated data. This entails information gathering, loop reconstruction and code instrumentation phases. From experiments, we found that, in our URD scheme, block-based deduplication always improves performance regardless of the duplication degree of write traffic, while page-based deduplication obtains performance enhancement or performance degradation, depending on the duplication degree of write traffic.
机译:闪存中的重复数据删除技术可以减轻闪存的缺陷,从而提高性能和可靠性,这可以通过消除闪存中的重复数据来实现。但是,现有的工作主要集中在运行时数据管理的效率上,而不考虑程序流程。我们提出了一种新的应用程序感知重复数据删除方法,称为闪存的未修改区域检测(URD)。 URD重构应用程序的循环块,以避免重复的更新操作,该操作旨在减小就地更新数据的大小。这需要信息收集,循环重建和代码检测阶段。从实验中我们发现,在我们的URD方案中,基于块的重复数据删除始终提高性能,而与写流量的重复程度无关,而基于页面的重复数据删除则取决于写流量的重复程度而获得性能增强或性能下降。

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