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Application-aware deduplication for performance improvement of flash memory

机译：Application-aware deduplication for performance improvement of flash memory

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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.

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