TY - GEN
T1 - Evolving EXT4 for shingled disks
AU - Aghayev, Abutalib
AU - Ts'O, Theodore
AU - Gibson, Garth
AU - Desnoyers, Peter
N1 - Publisher Copyright:
© Proceedings of the 15th USENIX Conference on File and Storage Technologies, FAST 2017. All rights reserved.
PY - 2017
Y1 - 2017
N2 - Drive-Managed SMR (Shingled Magnetic Recording) disks offer a plug-compatible higher-capacity replacement for conventional disks. For non-sequential workloads, these disks show bimodal behavior: After a short period of high throughput they enter a continuous period of low throughput. We introduce ext4-lazy1, a small change to the Linux ext4 file system that significantly improves the throughput in both modes. We present benchmarks on four different drive-managed SMR disks from two vendors, showing that ext4-lazy achieves 1.7-5.4× improvement over ext4 on a metadata-light file server benchmark. On metadata-heavy benchmarks it achieves 2-13× improvement over ext4 on drive-managed SMR disks as well as on conventional disks.
AB - Drive-Managed SMR (Shingled Magnetic Recording) disks offer a plug-compatible higher-capacity replacement for conventional disks. For non-sequential workloads, these disks show bimodal behavior: After a short period of high throughput they enter a continuous period of low throughput. We introduce ext4-lazy1, a small change to the Linux ext4 file system that significantly improves the throughput in both modes. We present benchmarks on four different drive-managed SMR disks from two vendors, showing that ext4-lazy achieves 1.7-5.4× improvement over ext4 on a metadata-light file server benchmark. On metadata-heavy benchmarks it achieves 2-13× improvement over ext4 on drive-managed SMR disks as well as on conventional disks.
UR - https://www.scopus.com/pages/publications/85077179709
UR - https://www.scopus.com/pages/publications/85077179709#tab=citedBy
M3 - Conference contribution
AN - SCOPUS:85077179709
T3 - Proceedings of the 15th USENIX Conference on File and Storage Technologies, FAST 2017
SP - 105
EP - 119
BT - Proceedings of the 15th USENIX Conference on File and Storage Technologies, FAST 2017
PB - USENIX Association
T2 - 15th USENIX Conference on File and Storage Technologies, FAST 2017
Y2 - 27 February 2017 through 2 March 2017
ER -