PMSH: a new algorithm for RAID data migration based on stripe unit heat

Author

Liu, Yan ; Xie, Chang-Sheng ; Li, Huai-Yang

Author_Institution

Key Lab. of Data Storage Syst., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

6

fYear

2005

fDate

18-21 Aug. 2005

Firstpage

3421

Abstract

Traditional RAID has the characteristics that location of stripe unit in each disk is stochastic and static, and that the outer zone of the disk has higher data transfer rate as compared to the inner one. Facing this situation, to exploit RAID I/O performance fully, this paper proposes a new algorithm PMSH (placement and migration based on stripe unit heat) for RAID stripe unit data to be placed optically and migrate dynamically. Based on the heat of RAID stripe unit, PMSH keeps migrating the frequently accessed stripe unit to the disk zone with higher data transfer rate, thus optimize the location of data in RAID disks, and make the data distribution adapt to the evolution of file access pattern dynamically as well. Simulation results demonstrate significant RAID I/O performance improvement using PMSH.

Keywords

RAID; storage management; PMSH; RAID I/O performance; RAID data migration; data transfer rate; file access pattern; stripe unit heat; Angular velocity; Computer science; Data storage systems; Disk drives; Disk recording; File systems; Heat transfer; Laboratories; Performance analysis; Stochastic systems; RAID; heat; multi-zone disk; stripe unit;

fLanguage

English

Publisher

ieee

Conference_Titel

Machine Learning and Cybernetics, 2005. Proceedings of 2005 International Conference on

Conference_Location

Guangzhou, China

Print_ISBN

0-7803-9091-1

Type

conf

DOI

10.1109/ICMLC.2005.1527533

Filename

1527533