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HS-RAID2: Optimizing Small Write Performance in HS-RAID


Affiliations
1 School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China
 

HS-RAID (Hybrid Semi-RAID), a power-aware RAID, saves energy by grouping disks in the array. All of the write operations in HSRAID are small write which degrade the storage system's performance severely. In this paper, we propose a redundancy algorithm, data incremental parity algorithm (DIP), which employs HS-RAID to minimize the write penalty and improves the performance and reliability of the storage systems. The experimental results show that HS-RAID2 (HS-RAID with DIP) is faster and has higher reliability than HS-RAID remarkably.
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  • HS-RAID2: Optimizing Small Write Performance in HS-RAID

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Authors

Yongfeng Dong
School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China
Jingyu Liu
School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China
Jie Yan
School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China
Hongpu Liu
School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China
Youxi Wu
School of Computer Science and Engineering, Hebei University of Technology, Xiping Road No. 5340, Beichen District, Tianjin 300401, China

Abstract


HS-RAID (Hybrid Semi-RAID), a power-aware RAID, saves energy by grouping disks in the array. All of the write operations in HSRAID are small write which degrade the storage system's performance severely. In this paper, we propose a redundancy algorithm, data incremental parity algorithm (DIP), which employs HS-RAID to minimize the write penalty and improves the performance and reliability of the storage systems. The experimental results show that HS-RAID2 (HS-RAID with DIP) is faster and has higher reliability than HS-RAID remarkably.