Paper Info
Title
S2-RAID: A new RAID architecture for fast data recovery
Abstract
As disk volume grows rapidly with terabyte disk becoming a norm, RAID reconstruction time in case of a failure takes prohibitively long time. This paper presents a new RAID architecture, S2-RAID, allowing the disk array to reconstruct very quickly in case of a disk failure. The idea is to form skewed sub RAIDs (S2-RAID) in the RAID structure so that reconstruction can be done in parallel dramatically speeding up data reconstruction time and hence minimizing the chance of data loss. To make such parallel reconstruction conflict-free, each sub-RAID is formed by selecting one logic partition from each disk group with size being a prime number. We have implemented a prototype S2-RAID system in Linux operating system for the purpose of evaluating its performance potential. SPC IO traces and standard benchmarks have been used to measure the performance of S2-RAID as compared to existing baseline software RAID, MD. Experimental results show that our new S2-RAID speeds up data reconstruction time by a factor of 3 to 6 compared to the traditional RAID. At the same time, S2-RAID shows similar or better production performance than baseline RAID while online RAID reconstruction is in progress.
Year
DOI
Venue
2010
10.1109/MSST.2010.5496980
MSST
Keywords
Field
DocType
disk array,parallel reconstruction,raid,parallel reconstruction conflict-free,raid architecture,raid reconstruction time,fast data recovery,online raid reconstruction,prototype s2-raid system,disk group,s2-raid speed,prime number,logic partition,linux operating system,disk failure,system recovery,linux,spc io traces,new raid architecture,skewed sub raid,memory architecture,traditional raid,disk volume,raid structure,data loss,s2-raid system,baseline raid,data reconstruction time,prototypes,operating system,software measurement,time measurement,databases,servers,benchmark testing,operating systems,logic
Non-standard RAID levels,Computer science,Intel Matrix RAID,Standard RAID levels,RAID,Disk Data Format,Computer hardware,Disk array controller,Parity drive,Nested RAID levels
Conference
ISSN
ISBN
Citations 
2160-195X
978-1-4244-7153-9
6
PageRank 
References 
Authors
0.47
20
4
Name
Order
Citations
PageRank
Jiguang Wan14710.21
Jibin Wang2152.45
Qing Yang3492.90
Changsheng Xie436666.54