Dynamic object assignment in object-based storage devices

Authors:
Lingjun Qin;Dan Feng
Affiliations:
Key Laboratory of Data Storage Systems, Ministry of Education of China, School of Computer, Huazhong University of Science and Technology, Wuhan, China;Key Laboratory of Data Storage Systems, Ministry of Education of China, School of Computer, Huazhong University of Science and Technology, Wuhan, China
Venue:
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Year:
2005

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Abstract

Object-based Storage Devices (OSDs) are the building block of Object-based Storage Systems. Object assignment in OSDs can largely affect the performance of OSDs. A real-time object assignment algorithm is proposed in the paper. The algorithm aims at minimizing the variance of Mean Response Time (MRT) across disks. To address the online problem with a priori unknown workload parameters, the algorithm employs an adaptive mechanism to estimate the parameters of workloads. The simulation results show that the algorithm can effectively balance the MRT in the disk I/O sub-systems.