Title :
HRAID6ML: A hybrid RAID6 storage architecture with mirrored logging
Author :
Zeng, Lingfang ; Feng, Dan ; Chen, Jianxi ; Wei, Qingsong ; Veeravalli, Bharadwaj ; Liu, Wenguo
Author_Institution :
Sch. of Comput., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
The RAID6 provides high reliability using double-parity-update at cost of high write penalty. In this paper, we propose HRAID6ML, a new logging architecture for RAID6 systems for enhanced energy efficiency, performance and reliability. HRAID6ML explores a group of Solid State Drives (SSDs) and Hard Disk Drives (HDDs): Two HDDs (parity disks) and several SSDs form RAID6. The free space of the two parity disks is used as mirrored log region of the whole system to absorb writes. The mirrored logging policy helps to recover system from parity disk failure. Mirrored logging operation does not introduce noticeable performance overhead to the whole system. HRAID6ML eliminates the additional hardware and energy costs, potential single point of failure and performance bottleneck. Furthermore, HRAID6ML prolongs the lifecycle of the SSDs and improves the systems energy efficiency by reducing the SSDs write frequency. We have implemented proposed HRAID6ML. Extensive trace-driven evaluations demonstrate the advantages of the HRAID6ML system over both traditional SSD-based RAID6 system and HDD-based RAID6 system.
Keywords :
RAID; disc drives; energy conservation; failure analysis; hard discs; memory architecture; reliability; HDD; HDD-based RAID6 system; HRAID6ML system; SSD; SSD-based RAID6 system; double-parity update; energy costs; hard disk drives; high write penalty; hybrid RAID6 storage architecture; mirrored log region; mirrored logging architecture; mirrored logging policy; parity disk failure; parity disks free space; solid state drives; systems energy efficiency; trace-driven evaluations; Arrays; Ash; Monitoring; Reliability; Software; Time factors;
Conference_Titel :
Mass Storage Systems and Technologies (MSST), 2012 IEEE 28th Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-1745-0
Electronic_ISBN :
2160-195X
DOI :
10.1109/MSST.2012.6232374