Rethink the sync (2006)
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| Venue: | In Proc. OSDI |
| Citations: | 32 - 6 self |
BibTeX
@INPROCEEDINGS{Nightingale06rethinkthe,
author = {Edmund B. Nightingale and Kaushik Veeraraghavan and Peter M. Chen and Jason Flinn},
title = {Rethink the sync},
booktitle = {In Proc. OSDI},
year = {2006},
pages = {1--14}
}
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Abstract
We introduce external synchrony, a new model for local file I/O that provides the reliability and simplicity of synchronous I/O, yet also closely approximates the performance of asynchronous I/O. An external observer cannot distinguish the output of a computer with an externally synchronous file system from the output of a computer with a synchronous file system. No application modification is required to use an externally synchronous file system: in fact, application developers can program to the simpler synchronous I/O abstraction and still receive excellent performance. We have implemented an externally synchronous file system for Linux, called xsyncfs. Xsyncfs provides the same durability and ordering guarantees as those provided by a synchronously mounted ext3 file system. Yet, even for I/O-intensive benchmarks, xsyncfs performance is within 7 % of ext3 mounted asynchronously. Compared to ext3 mounted synchronously, xsyncfs is up to two orders of magnitude faster. 1
