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Consistency Without Ordering

Authors: 

Vijay Chidambaram, Tushar Sharma, Andrea C. Arpaci-Dusseau, and Remzi H. Arpaci-Dusseau,University of Wisconsin, Madison


 

Abstract: 

Modern file systems use ordering points to maintain consistency in the face of system crashes. However, such ordering leads to lower performance, higher complexity, and a strong and perhaps naive dependence on lower layers to correctly enforce the ordering of writes. In this paper, we introduce the No-Order File System (NoFS), a simple, lightweight file system that employs a novel technique called backpointer-based consistency to provide crash consistency without ordering writes as they go to disk. We utilize a formal model to prove that NoFS provides data consistency in the event of system crashes; we show through experiments that NoFS is robust to such crashes, and delivers excellent performance across a range of workloads. Backpointer-based consistency thus allows NoFS to provide crash consistency without resorting to the heavyweight machinery of traditional approaches.

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BibTeX
@inproceedings {266399,
title = {Consistency Without Ordering},
booktitle = {10th USENIX Conference on File and Storage Technologies (FAST 12)},
year = {2012},
address = {San Jose, CA},
url = {https://www.usenix.org/conference/fast12/consistency-without-ordering},
publisher = {USENIX Association},
month = feb,
}
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