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http://dx.doi.org/10.5392/JKCA.2019.19.05.417

Online Snapshot Method based on Directory and File Change Tracking for Virtual File System  

Kim, Jinsu (한국교통대학교 컴퓨터공학전공)
Song, Seokil (한국교통대학교 컴퓨터공학전공)
Shin, Jae Ryong (광주보건대학교 보건행정과)
Publication Information
The Journal of the Korea Contents Association / v.19, no.5, 2019 , pp. 417-425 More about this Journal
Abstract
Storage snapshot technology allows to preserve data at a specific point in time, and recover and access data at a desired point in time. It is an essential technology for storage protection application. Existing snapshot methods have some problems in that they dependent on storage hardware vendor, file system or virtual block device. In this paper, we propose a new snapshot method for solving the problems and creating snapshots on-line. The proposed snapshot method uses a method of extracting the log records of update operations at the virtual file system layer to enable the snapshot method to operate independently on file systems, virtual block devices, and storage hardwares. In addition, the proposed snapshot mehod creates and manages snapshots for directories and files without interruption to the storage service. Finally, through experiments we measure the snapshot creation time and the performance degradation caused by the snapshot.
Keywords
Storage; Snapshot; Virtual File System; Recovery;
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