Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System

Ping Xiang Chen; Shuo Han Chen; Yuan Hao Chang; Yu Pei Liang; Wei Kuan Shih

doi:10.1145/3394885.3431517

Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System

Ping Xiang Chen, Shuo Han Chen, Yuan Hao Chang, Yu Pei Liang, Wei Kuan Shih

Institute of Artificial Intelligence Innovation

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Scopus citations

Abstract

The efficiency of secure deletion is highly dependent on the data layout of underlying storage devices. In particular, owing to the sequential-write constraint of the emerging Shingled Magnetic Recording (SMR) technology, an improper data layout could lead to serious write amplification and hinder the performance of secure deletion. The performance degradation of secure deletion on SMR drives is further aggravated with the need to securely erase the file system metadata of deleted files due to the small-size nature of file system metadata. Such an observation motivates us to propose a secure-deletion and SMR-aware space allocation (SSSA) strategy to facilitate the process of securely erasing both the deleted files and their metadata simultaneously. The proposed strategy is integrated within the widely-used extended file system 4 (ext4) and is evaluated through a series of experiments to demonstrate the effectiveness of the proposed strategy. The evaluation results show that the proposed strategy can reduce the secure deletion latency by 91.3% on average when compared with naive SMR-based ext4 file system.

Original language	English
Title of host publication	Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	728-733
Number of pages	6
ISBN (Electronic)	9781450379991
DOIs	https://doi.org/10.1145/3394885.3431517
State	Published - 18 Jan 2021
Event	26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021 - Virtual, Online, Japan Duration: 18 Jan 2021 → 21 Jan 2021

Publication series

Name	Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC

Conference

Conference	26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021
Country/Territory	Japan
City	Virtual, Online
Period	18/01/21 → 21/01/21

Keywords

ext4
metadata
secure deletion
shingled magnetic recording

Access to Document

10.1145/3394885.3431517

Cite this

Chen, P. X., Chen, S. H., Chang, Y. H., Liang, Y. P., & Shih, W. K. (2021). Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System. In Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021 (pp. 728-733). Article 3431517 (Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1145/3394885.3431517

Chen, Ping Xiang ; Chen, Shuo Han ; Chang, Yuan Hao et al. / Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System. Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 728-733 (Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC).

@inproceedings{558c72431dd6406fb807e31629b70bfe,

title = "Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System",

abstract = "The efficiency of secure deletion is highly dependent on the data layout of underlying storage devices. In particular, owing to the sequential-write constraint of the emerging Shingled Magnetic Recording (SMR) technology, an improper data layout could lead to serious write amplification and hinder the performance of secure deletion. The performance degradation of secure deletion on SMR drives is further aggravated with the need to securely erase the file system metadata of deleted files due to the small-size nature of file system metadata. Such an observation motivates us to propose a secure-deletion and SMR-aware space allocation (SSSA) strategy to facilitate the process of securely erasing both the deleted files and their metadata simultaneously. The proposed strategy is integrated within the widely-used extended file system 4 (ext4) and is evaluated through a series of experiments to demonstrate the effectiveness of the proposed strategy. The evaluation results show that the proposed strategy can reduce the secure deletion latency by 91.3% on average when compared with naive SMR-based ext4 file system.",

keywords = "ext4, metadata, secure deletion, shingled magnetic recording",

author = "Chen, {Ping Xiang} and Chen, {Shuo Han} and Chang, {Yuan Hao} and Liang, {Yu Pei} and Shih, {Wei Kuan}",

note = "Publisher Copyright: {\textcopyright} 2021 Association for Computing Machinery.; 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021 ; Conference date: 18-01-2021 Through 21-01-2021",

year = "2021",

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doi = "10.1145/3394885.3431517",

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Chen, PX, Chen, SH, Chang, YH, Liang, YP & Shih, WK 2021, Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System. in Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021., 3431517, Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC, Institute of Electrical and Electronics Engineers Inc., pp. 728-733, 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021, Virtual, Online, Japan, 18/01/21. https://doi.org/10.1145/3394885.3431517

Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System. / Chen, Ping Xiang; Chen, Shuo Han; Chang, Yuan Hao et al.
Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. p. 728-733 3431517 (Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System

AU - Chen, Ping Xiang

AU - Chen, Shuo Han

AU - Chang, Yuan Hao

AU - Liang, Yu Pei

AU - Shih, Wei Kuan

PY - 2021/1/18

Y1 - 2021/1/18

N2 - The efficiency of secure deletion is highly dependent on the data layout of underlying storage devices. In particular, owing to the sequential-write constraint of the emerging Shingled Magnetic Recording (SMR) technology, an improper data layout could lead to serious write amplification and hinder the performance of secure deletion. The performance degradation of secure deletion on SMR drives is further aggravated with the need to securely erase the file system metadata of deleted files due to the small-size nature of file system metadata. Such an observation motivates us to propose a secure-deletion and SMR-aware space allocation (SSSA) strategy to facilitate the process of securely erasing both the deleted files and their metadata simultaneously. The proposed strategy is integrated within the widely-used extended file system 4 (ext4) and is evaluated through a series of experiments to demonstrate the effectiveness of the proposed strategy. The evaluation results show that the proposed strategy can reduce the secure deletion latency by 91.3% on average when compared with naive SMR-based ext4 file system.

AB - The efficiency of secure deletion is highly dependent on the data layout of underlying storage devices. In particular, owing to the sequential-write constraint of the emerging Shingled Magnetic Recording (SMR) technology, an improper data layout could lead to serious write amplification and hinder the performance of secure deletion. The performance degradation of secure deletion on SMR drives is further aggravated with the need to securely erase the file system metadata of deleted files due to the small-size nature of file system metadata. Such an observation motivates us to propose a secure-deletion and SMR-aware space allocation (SSSA) strategy to facilitate the process of securely erasing both the deleted files and their metadata simultaneously. The proposed strategy is integrated within the widely-used extended file system 4 (ext4) and is evaluated through a series of experiments to demonstrate the effectiveness of the proposed strategy. The evaluation results show that the proposed strategy can reduce the secure deletion latency by 91.3% on average when compared with naive SMR-based ext4 file system.

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ER -

Chen PX, Chen SH, Chang YH, Liang YP, Shih WK. Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System. In Proceedings of the 26th Asia and South Pacific Design Automation Conference, ASP-DAC 2021. Institute of Electrical and Electronics Engineers Inc. 2021. p. 728-733. 3431517. (Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC). doi: 10.1145/3394885.3431517

Facilitating the Efficiency of Secure File Data and Metadata Deletion on SMR-based Ext4 File System

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