Paper Info
Title
Chameleon: An Adaptive Wear Balancer For Flash Clusters
Abstract
NAND flash-based Solid State Devices (SSDs) offer the desirable features of high performance, energy efficiency, and fast growing capacity. Thus, the use of SSDs is increasing in distributed storage systems. A key obstacle in this context is that the natural unbalance in distributed I/O workloads can result in wear imbalance across the SSDs in a distributed setting. This, in turn can have significant impact on the reliability, performance, and lifetime of the storage deployment. Extant load balancers for storage systems do not consider SSD wear imbalance when placing data, as the main design goal of such balancers is to extract higher performance. Consequently, data migration is the only common technique for tackling wear imbalance, where existing data is moved from highly loaded servers to the least loaded ones.In this paper, we explore an innovative holistic approach, Chameleon, that employs data redundancy techniques such as replication and erasure-coding, coupled with endurance-aware write offloading, to mitigate wear level imbalance in distributed SSD-based storage. Chameleon aims to balance the wear among different flash servers while meeting desirable objectives of: extending life of flash servers; improving I/O performance; and avoiding bottlenecks. Evaluation with a 50 node SSD cluster shows that Chameleon reduces the wear distribution deviation by 81% while improving the write performance by up to 33%.
Year
DOI
Venue
2018
10.1109/IPDPS.2018.00125
2018 32ND IEEE INTERNATIONAL PARALLEL AND DISTRIBUTED PROCESSING SYMPOSIUM (IPDPS)
Field
DocType
ISSN
Efficient energy use,Load balancing (computing),Computer science,Distributed data store,Server,Redundancy (engineering),Data redundancy,Distributed database,Data migration,Distributed computing
Conference
1530-2075
Citations 
PageRank 
References 
0
0.34
16
Authors
10
Name
Order
Citations
PageRank
Nannan Zhao1243.66
Ali Anwar211314.83
Yue Cheng3759.77
Salman Mohammed4234.70
Da-ping Li501.35
Jiguang Wan64710.21
Changsheng Xie736666.54
Xubin He874763.49
Feiyi Wang921122.60
Ali R. Butt1065147.51