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Improving Flash Memory Performance and Reliability for Smartphones With I/O Deduplication.

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Title: Improving Flash Memory Performance and Reliability for Smartphones With I/O Deduplication.
Authors: Mao, Bo1, Zhou, Jindong1, Wu, Suzhen2, Chen, Xiao2, Yang, Weijian2, Jiang, Hong3
Source: IEEE Transactions on Computer-Aided Design of Integrated Circuits & Systems. Jun2019, Vol. 38 Issue 6, p1017-1027. 11p.
Subjects: Adobe Flash (Computer software), Memory, Intellect, Mental discipline, Smartphones
Abstract: Flash-based storage subsystem is the key component that affects the system performance, reliability, and cost efficiency of Android-based smartphones. In this paper, we first introduce a trace collection tool specifically designed to capture the I/O requests with important content features in Android-based smartphones, which are critically important but rarely available in content-aware designs and optimizations, such as JProbe and Netlink. Based on the analysis of the traces collected from 15 popular mobile applications, we find that 20%–40% of the I/O requests on the I/O critical path of the storage stack are redundant and this data redundancy is minimally shared among different applications. Based on this key observation, we propose a content-aware optimization, called APP-Dedupe, that applies data deduplication on the I/O critical path to improve both performance and efficiency by reducing write amplification and improving GC efficiency of the flash storage on Android smartphones. The evaluation results show that APP-Dedupe reduces the GC overhead by an average of 41.5%, reduces the response times by up to 15.4% and reduces the amount of write data by an average of 45.2%. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Flash-based storage subsystem is the key component that affects the system performance, reliability, and cost efficiency of Android-based smartphones. In this paper, we first introduce a trace collection tool specifically designed to capture the I/O requests with important content features in Android-based smartphones, which are critically important but rarely available in content-aware designs and optimizations, such as JProbe and Netlink. Based on the analysis of the traces collected from 15 popular mobile applications, we find that 20%–40% of the I/O requests on the I/O critical path of the storage stack are redundant and this data redundancy is minimally shared among different applications. Based on this key observation, we propose a content-aware optimization, called APP-Dedupe, that applies data deduplication on the I/O critical path to improve both performance and efficiency by reducing write amplification and improving GC efficiency of the flash storage on Android smartphones. The evaluation results show that APP-Dedupe reduces the GC overhead by an average of 41.5%, reduces the response times by up to 15.4% and reduces the amount of write data by an average of 45.2%. [ABSTRACT FROM AUTHOR]
ISSN:02780070
DOI:10.1109/TCAD.2018.2834395