[Rman]Rman增量备份level012的区别
2015-11-24 07:53
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RMAN备份全为全备和增量备份
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.
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
![](http://img.blog.csdn.net/20151124082028675?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center)
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)
![](http://img.blog.csdn.net/20151124082044959?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center)
转载地址:http://blog.itpub.net/22039464/viewspace-1070123/
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.
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)
转载地址:http://blog.itpub.net/22039464/viewspace-1070123/
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