增量备份和差异备份——试答网友Ansson 问

yanghere

先看看Acronis官方的说明：


A full backup contains all data at the moment of backup creation. It forms a base for further incremental or differential backup or is used as a standalone archive. A full backup has the shortest restore time as compared to incremental or differential ones.



An incremental backup file only contains data changed since the last full or incremental backup creation. Therefore, it is smaller and takes less time to create. But as it doesn’t contain all data, all the previous incremental backups and the initial full backup are required for restoration.



Unlike incremental backup, when every backup procedure creates the next file in a “chain,” a differential backup creates an independent file, containing all changes against the initial full archive. Generally, a differential backup will be restored faster than an incremental one, as it does not have to process through a long chain of previous backups.



区别就在红色字部分，增量备份每次都是以上次做的备份为参照的，它只备份和上次相比有变化的数据；差异备份则以初始的完全备份为参照，备份和完全备份中有差异的数据。

关于M$的ImageX我不大明白你在说什么，请Ansson朋友再详细描述一下^_^

Ansson

http://bbs.wuyou.net/forum.php?m ... mp;highlight=imagex

关于IMAGEX看看这篇文章就知道了,我就是想问TIDOS能不能实现增量备份不占用那么多空间这种功能

spadek

增量备份可以，但是跟IMAGEX原理不一样。。。o(∩_∩)o

yanghere

是的，我也觉得还是ms的imagex在增量备份方面比较有前途。可惜，imagex的备份不对磁盘进行操作，要分区格式化后才能还原，还原后也不能启动，这些都要用其他的工具来做。