Thanumalayan Sankaranarayana Pillai, Ramnatthan Alagappan, and Lanyue Lu, University of Wisconsin—Madison; Vijay Chidambaram, The University of Texas at Austin; Andrea C. Arpaci-Dusseau and Remzi H. Arpaci-Dusseau, University of Wisconsin—Madison
Best Paper at FAST '17: Link to Paper
Recent research has shown that applications often incorrectly implement crash consistency. We present ccfs, a file system that improves the correctness of application-level crash consistency protocols while maintaining high performance. A key idea in ccfs is the abstraction of a stream. Within a stream, updates are committed in program order, thus helping correctness; across streams, there are no ordering restrictions, thus enabling scheduling flexibility and high performance. We empirically demonstrate that applications running atop ccfs achieve high levels of crash consistency. Further, we show that ccfs performance under standard filesystem benchmarks is excellent, in the worst case on par with the highest performing modes of Linux ext4, and in some cases notably better. Overall, we demonstrate that both application correctness and high performance can be realized in a modern file system.
Open Access Media
USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.
author = {Thanumalayan Sankaranarayana Pillai and Ramnatthan Alagappan and Lanyue Lu and Vijay Chidambaram and Andrea C. Arpaci-Dusseau and Remzi H. Arpaci-Dusseau},
title = {Application Crash Consistency and Performance with {CCFS}},
booktitle = {2017 USENIX Annual Technical Conference (USENIX ATC 17)},
year = {2017},
address = {Santa Clara, CA},
url = {https://www.usenix.org/conference/atc17/technical-sessions/presentation/pillai},
publisher = {USENIX Association},
month = jul
}