TY - GEN
T1 - Semi-RAID
T2 - 2011 IEEE 27th Symposium on Mass Storage Systems and Technologies, MSST 2011
AU - Xiao, Li
AU - Yu-An, Tan
AU - Zhizhuo, Sun
PY - 2011
Y1 - 2011
N2 - In this paper, we propose an alternative RAID data layout, Semi-RAID (S-RAID), for the kind of application that exhibits a sequential data access pattern. The data layout of S-RAID uses a grouping strategy that makes only part of the whole array active and puts the rest of the array into standby mode. In this way S-RAID can greatly reduce the power consumption and improve the reliability while still satisfying the I/O requirements of the application. We have shown that transforming a traditional RAID 5 into S-RAID 5 makes average mean time to failure (MTTF) 8 times as long as before, and reduces the power consumption to 74% in a 5-disk configuration. In a typical video surveillance system that has 25 disks, S-RAID may reduce the power consumption to nearly 15% in the best case. The performance of S-RAID is evaluated and proved to be sufficient for the workloads it is optimized for. Possible optimization for other workloads has also been given at the end of the paper.
AB - In this paper, we propose an alternative RAID data layout, Semi-RAID (S-RAID), for the kind of application that exhibits a sequential data access pattern. The data layout of S-RAID uses a grouping strategy that makes only part of the whole array active and puts the rest of the array into standby mode. In this way S-RAID can greatly reduce the power consumption and improve the reliability while still satisfying the I/O requirements of the application. We have shown that transforming a traditional RAID 5 into S-RAID 5 makes average mean time to failure (MTTF) 8 times as long as before, and reduces the power consumption to 74% in a 5-disk configuration. In a typical video surveillance system that has 25 disks, S-RAID may reduce the power consumption to nearly 15% in the best case. The performance of S-RAID is evaluated and proved to be sufficient for the workloads it is optimized for. Possible optimization for other workloads has also been given at the end of the paper.
UR - https://www.scopus.com/pages/publications/79960924046
U2 - 10.1109/MSST.2011.5937222
DO - 10.1109/MSST.2011.5937222
M3 - Conference contribution
AN - SCOPUS:79960924046
SN - 9781457704284
T3 - IEEE Symposium on Mass Storage Systems and Technologies
BT - 2011 IEEE 27th Symposium on Mass Storage Systems and Technologies, MSST 2011
Y2 - 23 May 2011 through 27 May 2011
ER -