Research and design of remote logical volume replication system based on FreeBSD
基于FreeBSD的远程卷复制系统的研究与设计*

This paper presented the design of remote logical replication system based on FreeBSD, discussed its architecture and implementation method. The method added replication mechanism objected by Vinum logical volume manager, which could achieve replication on data block level while maintain independence on specific storage device. The system provided unique log mechanism and log protection, and supported synchronous, asynchronous replication strategies. Its transport protocol could be compatible with TCP/IP, and united with excellent compress technology to reduce network load. The system built a general and economical replication method and could be broadly applied.