Special Issue: Computer Networks and Distributed Computing

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Distributed Storage Cluster Design for Remote Mirroring Based on Storage Area Network

Jun Yao1,2, Ji-Wu Shu1, and Wei-Min Zheng1   

  1. 1Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China 2Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
  • Received:2006-06-29 Revised:2007-04-20 Online:2007-07-10 Published:2007-07-10

With the explosion of information nowadays, applying data storage safety requirements has become a new challenge, especially in high data available cluster environments. With the emergence of Storage Area Networks (SANs), storage can be network-based and consolidated, and mass data movements via Fiber Channels (FCs) can be of very high speed. Based on these features, this paper introduces a dual-node storage cluster designed for remote mirroring as a concurrent data replication method to protect data during system failures. This design takes full advantage of a SAN system's benefits, and it adopts a synchronous protocol to guarantee a fully up-to-date data copy on the remote site. By developing a Linux kernel module to control the I/O flow and by using the technologies of software Logic Unit Number (LUN) masking, background online resynchronization and a self-management daemon, we have achieved a reliable mirroring system with the characteristics of server-free data replication, fault tolerance, online disaster recovery and high performance. In this study, we implemented the design in a remote mirror subsystem built on a software Fiber Channel Storage Area Network (FC-SAN) system.

Key words: constraint satisfaction problem; constraint network; arc consistency; divide-and-conquer strategy; probabilistic analysis;



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ISSN 1000-9000(Print)

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CN 11-2296/TP

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