Paper Info
Title
RAID-6Plus: A Comprised Methodology for Extending RAID-6 Codes.
Abstract
Existing RAID-6 code extensions assume that failures are independent and instantaneous, overlooking the underlying mechanism of multifailure occurrences. Also, the effect of reconstruction window is ignored. Additionally, these coding extensions have not been adapted to occurrence patterns of failure in real-world applications. As a result, the third parity drive is set to handle the triple-failure scenario; however, the lower level failure situations have been left unattended. Therefore, a new methodology of extending RAID-6 codes named RAID-6Plus with better compromise has been studied in this paper. RAID-6Plus (Deng et al., 2015) employs short combinations which can greatly reuse overlapped elements during reconstruction to remake the third parity drive. A sample extension code called RDP+ is given based on RDP. Moreover, we extended the study to present another extension example called X-code+ which has better update penalty and load balance. The analysis shows that RAID-6Plus is a balanced tradeoff of reliability, performance, and practicality. For instance, RDP+ could achieve speedups as high as 33.4% in comparison to the RTP with conventional rebuild, 11.9% in comparison to RTP with the optimal rebuild, 47.7% in comparison to STAR with conventional rebuild, and 26.2% for a single failure rebuild.
Year
DOI
Venue
2017
10.1155/2017/1360413
MOBILE INFORMATION SYSTEMS
Field
DocType
Volume
Reuse,Computer science,Computer network,Coding (social sciences),Compromise,RAID,Distributed computing
Journal
2017
ISSN
Citations 
PageRank 
1574-017X
1
0.35
References 
Authors
7
6
Name
Order
Citations
PageRank
Ming-Zhu Deng183.20
Nong Xiao2649116.15
Songping Yu384.89
Fang Liu41188125.46
Lingyu Zhu512.71
Zhi-Guang Chen6124.35