oracle中Rman增量备份下各级别level的区别 | 您所在的位置:网站首页 › topik级别1和2区别 › oracle中Rman增量备份下各级别level的区别 |
RMAN备份分为全备和增量备份两部分 增量备份:分为0 1 2级 ORACLE官方解释: A level 1 incremental backup can be either of the following types: Adifferential backup, which backs up all blocks changed after the most recentincremental backup at level 1 or 0 A cumulative backup, which backs up all blocks changed after the most recentincremental backup at level 0 Incrementalbackups are differential by default. 默认是差异备份 在differential(差异)模式下(缺省) 0=全备 1=差异增量 上次全备或LV1至今的增量(无论是否有,有N次LV2的备份,一律从上次lv1或0至今的变化)0/1 ~ NOW 2=累积增量 上次任意级别备份至今的增量(任意一次备份至今)0/1/2 ~ NOW 在cumulative(累积的)模式下, 0=全备 1=上次全备至今的增量(无论是否有,有N次LV1的备份,一律从全备至今的变化)0 ~ NOW 2=上次0或1级别备份至今的增量(2次LV2间的累积,也汇总备份至今)0/1~ NOW (differential下的LV1)
原文转自http://blog.itpub.net/22039464/viewspace-1070123/) |
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