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A decentralized storage cluster with high reliability and flexibility

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2 Author(s)
Changsheng Xie ; Dept. of Comput. Sci., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Bin Cai

Decentralized, cooperative and large-scale distributed storage systems that consist of a cluster of storage nodes attached with local disks can deliver high resource utilization, high availability and easy scalability. Therefore they become a cost-effective solution. High availability with node failures, strong data consistency, flexible expandability and high I/O throughput are still important challenges in the face of the system design. In this paper, we describe the design and implementation of a LAN-based decentralized storage cluster built upon off-the-shelf commodity components. It employs replication and Erasure-codes to provide high reliability and automatic failure recovery, adopts versioning to achieve single-file serializability and replicas consistency, supports data migration scheme to balance I/O workload and storage utilization, and provides global unified content cache to optimize memory-to-disk policy. We also present the experiment results to demonstrate the features and performance of our design.

Published in:

Parallel, Distributed, and Network-Based Processing, 2006. PDP 2006. 14th Euromicro International Conference on

Date of Conference:

15-17 Feb. 2006