基于LVM的容灾系统传输协议的实现

本文首先介绍了作者基于Linux的逻辑卷管理系统(LVM)开发的一个数据容灾系统：逻辑卷复制器(Logic Volume Replieator，简称为LVR)。传输协议是这个系统中对它的性能有至关重要影响的组成部分。我们从协议层次，连接通路，报文设计三个方面对它进行了讨论。我们围绕实现错误状态恢复、保持数据的一致性，以及接管(failovef)和恢复(failback)这三个容灾系统特性分析了这个协议的实现流程。最后，我们给出了这个协议的评价。

Implementation of the Disaster-Tolerant System Transport Protocol Based on LVM

This paper first introduce a data disaster-tolerant system Logic Volume Replicator(LVR)we developed based on Logic Volume Manager(LVM)?Its transport protocol is a component which is crucial to its performance. We discuss the protocol from three aspects: protocol hierarchy, communication link and package design. Afterward we analyze the implementation of the protocol through three characters of disaster-tolerant system, which are the maintenance of data consistency, recovery from failure, and failover and failback. In the end, we give our assessment to the protocol.