Characterizing File Accesses in Android Applications and Caching Implications

In this paper, we explore Android applications’ file access characteristics, and find out that smartphone file accesses are different from traditional desktop applications in terms of the following aspects. 1) There exist a limited number of hot blocks, which are accessed consistently dur...

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Autores principales:	Soojung Lim, Hyokyung Bahn
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Android file access application smartphone buffer cache non-volatile memory Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/d8c0154b582041dd811f93904ef6aae6
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id	oai:doaj.org-article:d8c0154b582041dd811f93904ef6aae6
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spelling	oai:doaj.org-article:d8c0154b582041dd811f93904ef6aae62021-11-18T00:05:56ZCharacterizing File Accesses in Android Applications and Caching Implications2169-353610.1109/ACCESS.2021.3125779https://doaj.org/article/d8c0154b582041dd811f93904ef6aae62021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9605595/https://doaj.org/toc/2169-3536In this paper, we explore Android applications’ file access characteristics, and find out that smartphone file accesses are different from traditional desktop applications in terms of the following aspects. 1) There exist a limited number of hot blocks, which are accessed consistently during the entire execution of an application. 2) Block accesses in Android are highly biased such that the top 20% blocks account for 80% of total accesses. 3) Hot blocks of the top 100 rankings are mostly involved in SQLite. 4) Unlike desktop applications, file accesses in Android applications are write-intensive. 5) In predicting future file accesses in Android applications, frequency is a better estimator than temporal locality. 6) The effect of traditional buffer cache is limited in Android as file I/O in Android has a lot of synchronous writes, which incurs immediate storage flushing. Based on these analyses, this paper presents the implication of buffer cache management in Android. Specifically, we add a small non-volatile write buffer and present how this write buffer can be managed efficiently. Experimental results show that the proposed scheme improves the storage write traffic by an average of 21.7% and a maximum of 48.1% compared to the conventional buffer cache system.Soojung LimHyokyung BahnIEEEarticleAndroidfile accessapplicationsmartphonebuffer cachenon-volatile memoryElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 150292-150303 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Android file access application smartphone buffer cache non-volatile memory Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Android file access application smartphone buffer cache non-volatile memory Electrical engineering. Electronics. Nuclear engineering TK1-9971 Soojung Lim Hyokyung Bahn Characterizing File Accesses in Android Applications and Caching Implications
description	In this paper, we explore Android applications’ file access characteristics, and find out that smartphone file accesses are different from traditional desktop applications in terms of the following aspects. 1) There exist a limited number of hot blocks, which are accessed consistently during the entire execution of an application. 2) Block accesses in Android are highly biased such that the top 20% blocks account for 80% of total accesses. 3) Hot blocks of the top 100 rankings are mostly involved in SQLite. 4) Unlike desktop applications, file accesses in Android applications are write-intensive. 5) In predicting future file accesses in Android applications, frequency is a better estimator than temporal locality. 6) The effect of traditional buffer cache is limited in Android as file I/O in Android has a lot of synchronous writes, which incurs immediate storage flushing. Based on these analyses, this paper presents the implication of buffer cache management in Android. Specifically, we add a small non-volatile write buffer and present how this write buffer can be managed efficiently. Experimental results show that the proposed scheme improves the storage write traffic by an average of 21.7% and a maximum of 48.1% compared to the conventional buffer cache system.
format	article
author	Soojung Lim Hyokyung Bahn
author_facet	Soojung Lim Hyokyung Bahn
author_sort	Soojung Lim
title	Characterizing File Accesses in Android Applications and Caching Implications
title_short	Characterizing File Accesses in Android Applications and Caching Implications
title_full	Characterizing File Accesses in Android Applications and Caching Implications
title_fullStr	Characterizing File Accesses in Android Applications and Caching Implications
title_full_unstemmed	Characterizing File Accesses in Android Applications and Caching Implications
title_sort	characterizing file accesses in android applications and caching implications
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/d8c0154b582041dd811f93904ef6aae6
work_keys_str_mv	AT soojunglim characterizingfileaccessesinandroidapplicationsandcachingimplications AT hyokyungbahn characterizingfileaccessesinandroidapplicationsandcachingimplications
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Characterizing File Accesses in Android Applications and Caching Implications

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