Paper Info
Title
A reliability optimization method for RAID-structured storage systems based on active data migration
Abstract
The reliability of RAID system can utilize reconstruction operations to recover data when the disk fails; however, it will result in longer recovery time and negative impact on system performances. Moreover, the possibility of secondary failure will be increased during the recovery period. This paper proposed a new reliability optimization method for RAID system with Active data Migration called RAM, which allocates reserved space in every disk and arranges to redirect the data in the non-repairable sectors to the reserved space called Internal-disk Data Migration. When the number of the bad sectors in the disk exceeds threshold or the disk is in poor reliability, the system will copy data of the unreliable disk to a new one called External-disk Data Migration, this process can avoid lengthy data reconstruction. It can dynamically adjust migration speed to reduce the impact on the front end performance. When the I/O load of system is bursting, the I/O requests from user have high-priority. The overall results indicate that the RAM can improve reliability of the system with little influence.
Year
DOI
Venue
2013
10.1016/j.jss.2012.09.023
Journal of Systems and Software
Keywords
Field
DocType
raid-structured storage system,new reliability optimization method,internal-disk data migration,unreliable disk,system performance,poor reliability,active data,raid system,lengthy data reconstruction,o load,external-disk data migration,active data migration
Front and back ends,Data reconstruction,Computer science,Real-time computing,Disk mirroring,RAID,Reliability optimization,Data migration
Journal
Volume
Issue
ISSN
86
2
0164-1212
Citations 
PageRank 
References 
1
0.35
30
Authors
6
Name
Order
Citations
PageRank
Yin Yang121.38
Zhihu Tan263.62
Jiguang Wan3299.71
Changsheng Xie436666.54
Jie Yu510.35
Jian He610.69