Sudarsun Kannan, Andrea C. Arpaci-Dusseau, and Remzi H. Arpaci-Dusseau, University of Wisconsin—Madison; Yuangang Wang, Jun Xu, and Gopinath Palani, Huawei Technologies
We present DevFS, a direct-access file system embedded completely within a storage device. DevFS provides direct access without compromising file system integrity, concurrency, crash consistency, and security. A novel reverse-caching mechanism enables the usage of host memory for inactive objects, thus reducing memory load upon the device. Evaluation of an emulated DevFS prototype shows more than 2x higher I/O throughput with direct access and up to a 78% reduction in device RAM utilization.
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author = {Sudarsun Kannan and Andrea C. Arpaci-Dusseau and Remzi H. Arpaci-Dusseau and Yuangang Wang and Jun Xu and Gopinath Palani},
title = {Designing a True {Direct-Access} File System with {DevFS}},
booktitle = {16th USENIX Conference on File and Storage Technologies (FAST 18)},
year = {2018},
isbn = {978-1-931971-42-3},
address = {Oakland, CA},
pages = {241--256},
url = {https://www.usenix.org/conference/fast18/presentation/kannan},
publisher = {USENIX Association},
month = feb
}