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.
Original language | English |
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Title of host publication | SYSTOR 2016 - Proceedings of the 9th ACM International Systems and Storage Conference |
Publisher | Association for Computing Machinery, Inc |
ISBN (Electronic) | 9781450343817 |
DOIs | |
State | Published - 6 Jun 2016 |
Event | 9th ACM International Systems and Storage Conference, SYSTOR 2016 - Haifa, Israel Duration: 6 Jun 2016 → 8 Jun 2016 |
Publication series
Name | SYSTOR 2016 - Proceedings of the 9th ACM International Systems and Storage Conference |
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Conference
Conference | 9th ACM International Systems and Storage Conference, SYSTOR 2016 |
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Country/Territory | Israel |
City | Haifa |
Period | 6/06/16 → 8/06/16 |
Bibliographical note
Publisher Copyright:Copyright © 2016 ACM.
Keywords
- Caching
- File system
- Journaling
- Virtualization