一种共享式存储系统的备份与恢复

VSVM是具有迭代式快照机制的逻辑卷管理系统。该文针对VSVM的应用性能和系统构成提出了备份/恢复的机制与方法，使VSVM逻辑卷上的用户数据及逻辑卷间快照结构都能得到保护和恢复，保持了VSVM与快照结构相关的性能特性。逻辑卷备份数据与快照创建时刻数据状态被独立分开，其余的机制和方法在此基础上使系统能够支持逻辑卷间彼此独立的备份策略，保证数据备份与恢复的步骤的简单性，为数据的实际备份应用带来方便。

Backup and Recovery of Shared Storage System

VSVM is a logical volume manager providing an ordinary-application-oriented iterative snapshot mechanism. This paper presents a series of backup/recovery mechanisms and methods that focus on VSVM performance and system construction to protect and restore user’s data on volumes and the snapshot logic of these volumes, which can further maintain snapshot-logic-based system performance. The backup data of a (snapshot) volume is independent of its exactly initial data status. Based on that, other mechanisms and methods enable VSVM to support independent backup policies on different logical volumes, while maintaining the simplicity of data backup and recovery processes.