摘要
数据备份是数据高可用性的最后一道防线。磁带备份技术容易出现错误,使数据恢复操作往往会因为磁带介质损坏的原因而无法成功执行。磁盘备份技术是利用磁盘阵列做底层数据存储,通过虚拟软件将该磁盘阵列虚拟为磁带库。基于磁盘的重复数据删除技术,旨在删除冗余的备份数据、确保同样的数据信息只被保存一次,减少了对存储容量的需求,以更少的空间存储更多的数据,极大地减少了数据备份和恢复时间,满足了高性能备份的要求,从而保证了备份数据的可恢复性。本文在比较磁带备份与磁盘备份的基础上,介绍了磁盘的重复数据删除技术及其在数据备份系统中的应用。
Data backup is the last defense line to guarantee the high availability of data. Errors are easy to occur in the tape backup, as a result, it is difficult to complete the data recovery because of the damage in tape medium. The technique of disk backup is the one by utilizing disk array as underlying data storage, and making the disk array as a tape library by using a virtual software. Aiming at deleting redundant backup data, making sure the same data message saved only one time, decreasing the demand for storage, and holding more data with less space, the technique of data deduplication in disk could realize the significant improvement, obviously reduce the time of data backup and recovery, thus to meet the requirement of high-performance backup, and guarantee the restorability of backup data. On the basis of comparison between tape backup and disk backup, this paper introduces the data deduplication technique and its application in data backup system.
出处
《中国医疗设备》
2012年第10期78-79,171,共3页
China Medical Devices
