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.