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Reducing journaling harm on virtualized I/O systems
- Title
- Reducing journaling harm on virtualized I/O systems
- Authors
- Lee E.; Bahn H.; Jeong M.; Kim S.; Yeon J.; Yoo S.; Noh S.H.; Shin K.G.
- Ewha Authors
- 반효경
- SCOPUS Author ID
- 반효경
- Issue Date
- 2016
- Journal Title
- SYSTOR 2016 - Proceedings of the 9th ACM International Systems and Storage Conference
- Citation
- SYSTOR 2016 - Proceedings of the 9th ACM International Systems and Storage Conference
- Keywords
- Caching; File system; Journaling; Virtualization
- Publisher
- Association for Computing Machinery, Inc
- Indexed
- SCOPUS
- Document Type
- Conference Paper
- Abstract
- This paper analyzes the host cache effectiveness in full virtualization, particularly associated with journaling of guests. We observe that the journal access of guests degrades cache performance largely due to the write-once access pattern and the frequent sync operations. To remedy this problem, we design and implement a novel caching policy, called PDC (Pollution Defensive Caching), that detects the journal accesses and prevents them from entering the host cache. The proposed PDC is implemented in QEMU-KVM 2.1 on Linux 4.14 and provides 3-32% performance improvement for various file and I/O benchmarks. Copyright © 2016 ACM.
- DOI
- 10.1145/2928275.2928289
- ISBN
- 9781450343817
- Appears in Collections:
- 인공지능대학 > 컴퓨터공학과 > Journal papers
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