Paper Info
Title
Baoverlay: a block-accessible overlay file system for fast and efficient container storage
Abstract
Container storage commonly relies on overlay file systems to interpose read-only container images upon backing file systems. While being transparent to and compatible with most existing backing file systems, the overlay file-system approach imposes nontrivial I/O overhead to containerized applications, especially for writes: To write a file originating from a read-only container image, the whole file will be copied to a separate, writable storage layer, resulting in long write latency and inefficient use of container storage. In this paper, we present BAOverlay, a lightweight, block-accessible overlay file system: Equipped with a new block-accessibility attribute, BAOverlay not only exploits the benefit of using an asynchronous copy-on-write mechanism for fast file updates but also enables a new file format for efficient use of container storage space. We have developed a prototype of BAOverlay upon Linux Ext4. Our evaluation with both micro-benchmarks and real-world applications demonstrates the effectiveness of BAOverlay with improved write performance and on-demand container storage usage.
Year
DOI
Venue
2020
10.1145/3419111.3421291
SoCC '20: ACM Symposium on Cloud Computing Virtual Event USA October, 2020
DocType
ISBN
Citations 
Conference
978-1-4503-8137-6
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Yu Sun100.68
Jiaxin Lei231.09
Seunghee Shin311.02
Hui Lu401.01