Paper Info
Title
H-Scale: A Fast Approach to Scale Disk Arrays via Hybrid Stripe Deployment.
Abstract
To satisfy the explosive growth of data in large-scale data centers, where redundant arrays of independent disks (RAIDs), especially RAID-5, are widely deployed, effective storage scaling and disk expansion methods are desired. However, a way to reduce the data migration overhead and maintain the reliability of the original RAID are major concerns of storage scaling. To address these problems, we propose a new RAID scaling scheme, H-Scale, to achieve fast RAID scaling via hybrid stripe layouts. H-Scale takes advantage of the loose restriction of stripe structures to choose migrated data and to create hybrid stripe structures. The main advantages of our scheme include: (1) dramatically reducing the data migration overhead and thus speeding up the scaling process, (2) maintaining the original RAID’s reliability, (3) balancing the workload among disks after scaling, and (4) providing a general scaling approach for different RAID levels. Our theoretical analysis show that H-Scale outperforms existing scaling solutions in terms of data migration, I/O overheads, and parity update operations. Evaluation results on a prototype implementation demonstrate that H-Scale speeds up the online scaling process by up to 60% under SPC traces, and similar improvements on scaling time and user response time are also achieved by evaluations using standard benchmarks.
Year
DOI
Venue
2016
10.1145/2822895
TOS
Keywords
Field
DocType
RAID, RAID scaling, hybrid stripe
Disk array,Computer science,Parallel computing,Response time,Real-time computing,Standard RAID levels,RAID,Nested RAID levels,Scaling,Parity drive,Data migration
Journal
Volume
Issue
ISSN
12
3
1553-3077
Citations 
PageRank 
References 
0
0.34
22
Authors
6
Name
Order
Citations
PageRank
Jiguang Wan14710.21
Peng Xu2282.69
Xubin He374763.49
Jibin Wang4152.45
Junyao Li500.34
Changsheng Xie6192.35