一种SAN环境下数据备份系统的设计与实现

Design and Implementation of a SAN-Data Backup System

如何减少SAN环境下的海量数据备份工作的时间开销是一个重要的问题.本文通过一种动态链表结构队列解决了磁带设备的共享问题,并智能地利用磁带资源.在此基础上介绍了多主机并发工作的调度方法.本文还提出了SAN环境中多主机共享的网络磁盘的分配策略,以及网络环境下的数据增量备份的实现方法.运用这些技术实现的LAN-F ree数据备份系统,能够有效地提高SAN环境下的数据备份工作效率.

It is crucial to reduce the time cost for the mass data backup in SAN environment. In this paper, a dynamic queue structure is designed for the sharing of tape device. It can utilize the tape resource effectively. Based on it, a scheduling method for concurrent jobs from SAN-hosts is introduced. This paper also proposed an assigning policy for the shared network disks, and the realization of incremental backup in the network environment. Those techniques were used to implement a LAN-Free backup system, which can greatly improve the backup efficiency in the SAN environment.