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Shortcut-JFS: A write efficient journaling file system for phase change memory

Title
Shortcut-JFS: A write efficient journaling file system for phase change memory
Authors
Lee E.Yoo S.Jang J.-E.Bahn H.
Ewha Authors
반효경
SCOPUS Author ID
반효경scopus
Issue Date
2012
Journal Title
IEEE Symposium on Mass Storage Systems and Technologies
ISSN
2160-1968JCR Link
Indexed
SCOPUS scopus
Abstract
Journaling file systems are widely used in modern computer systems as it provides high reliability with reasonable performance. However, existing journaling file systems are not efficient for emerging PCM (Phase Change Memory) storage. Specifically, a large amount of write operations performed by journaling incur serious performance degradation of PCM storage as it has long write latency. In this paper, we present a new journaling file system for PCM, called Shortcut-JFS, that reduces write amount of journaling by more than a half exploiting the byte-accessibility of PCM. Specifically, Shortcut-JFS performs two novel schemes, 1) differential logging that performs journaling only for modified bytes and 2) in-place checkpointing that removes unnecessary block copy overhead. We implemented Shortcut-JFS on Linux 2.6, and measured the performance of Shortcut-JFS and legacy journaling schemes used in ext 3. The results show that the performance improvement of Shortcut-JFS against ext 3 is 40% on average. © 2012 IEEE.
DOI
10.1109/MSST.2012.6232378
ISBN
9781467317450
Appears in Collections:
엘텍공과대학 > 컴퓨터공학과 > Journal papers
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