Reducing journaling harm on virtualized I/O systems
- 주제(키워드) Caching , File system , Journaling , Virtualization
- 관리정보기술 faculty
- 등재 SCOPUS
- 발행기관 Association for Computing Machinery, Inc
- 발행년도 2016
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000131318
- ISBN 9781450343817
- 본문언어 영어
- Published As http://dx.doi.org/10.1145/2928275.2928289
초록/요약
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.
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