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http://dx.doi.org/10.5392/JKCA.2021.21.07.157

Design and Implementation of NVM-based Concurrent Journaling Scheme  

Pak, Suehee (동덕여자대학교 컴퓨터학과)
Lee, Eunyoung (동덕여자대학교 컴퓨터학과)
Han, Hyuck (동덕여자대학교 컴퓨터학과)
Publication Information
The Journal of the Korea Contents Association / v.21, no.7, 2021 , pp. 157-163 More about this Journal
Abstract
A single write operation in a file system can modify multiple data, but these changes in the file system are not atomically written to disk. Thus, for the consistency of the file system, conventional journaling guarantees crash consistency instead of sacrificing the system performance. It is known that using non-volatile memory as a journal space can alleviate performance degradation due to low latency and byte-level accessibility of non-volatile memory. However, none of the journaling techniques considering non-volatile memory provide scalability. In this paper, journal space on non-volatile memory is divided into multiple regions for scalable journaling, thus dispersing concentrated operations in one region. Second, the journal area-specific operator structure is used to accelerate data write operations to storage devices. We apply the proposed technique to JFS to evaluate it on multi-core servers equipped with high-performance storage devices. The evaluation results show that the proposed technique performs better than the existing technique of the NVM-based journaling file system.
Keywords
Crash Consistency; File System; Non-Volatile Memory; Journaling; multicore Scalability;
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