一种新的复合快照技术的研究与设计  

RESEARCH AND DESIGN OF A NEW MULTIPLE SNAPSHOT TECHNIQUE

作　　者：牛超[1] 杨英杰[1] 代向东[1] 

机构地区：[1]解放军信息工程大学电子技术学院,河南郑州450004

出　　处：《计算机应用与软件》2013年第7期164-167,共4页Computer Applications and Software

基　　金：河南省基础与前沿技术研究计划项目(102300413203)

摘　　要：针对当前镜像分离技术占用存储空间大、快照数量受限且无法解决系统逻辑错误,以及写前拷贝技术与重定向写技术因共享源卷数据而无法解决磁盘物理损坏造成的数据丢失问题,有效结合镜像分离技术与重定向写技术的优点,设计一种复合快照机制。既保留源数据卷的全备份,解决快照数量限制的问题,又完整地保存了增量快照数据,实现了应用复合快照技术的数据保护系统兼备了数据容错与容灾能力。Current split-mirror technique takes up large storage space, the number of snapshots is restrained and can＇ t solve the system logic error. Due to sharing the source volume data, the copy-on-write and redirect-on-write techniques can＇ t solve data loss problem caused by the physical damage of the disk. In light of these problems, we design a multiple snapshot mechanism based on effective integration of the advantages of split-mirror and redirect-on-write techniques. While keeping the integral backup of the source data volume and resolves the ,limitation on maximum number of snapshots, it also intactly preserves the incremented snapshot data as well. It achieves that the data protection system using multiple snapshot technique have both the capabilities of disaster tolerance and fault tolerance.

关 键 词：容灾 容错 数据保护 复合快照 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]