dg中基于scn恢复RMAN-06094故障解决

dataguard中出现gap后,采用基于scn的备份和恢复的方法进行恢复.

在恢复的过程中出现报错:

RMAN> recover database noredo;

Starting recover at 05-FEB-20
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
using channel ORA_DISK_4
using channel ORA_DISK_5
using channel ORA_DISK_6
using channel ORA_DISK_7
using channel ORA_DISK_8
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 02/05/2020 12:12:28
RMAN-06094: datafile 71 must be restored

查询数据字典 发现这个数据文件为新增的数据文件,standby端还没有此数据文件,所以需要先将此datafile进restore,否则无法recover.查找新增的数据文件sql如下:

SQL> select file#,name from v$datafile where creation_change#> =139323967;

解决办法:

找到所有gap之后新增的数据文件,例如71-77号数据文件,先备份进行restore:

原库:

RMAN> backup datafile 71,72,73,74,75,76,77 format '/rmanbak/backup/newfile_%U.bak';

在备库进行还原: 

RMAN> restore datafile 71,72,73,74,75,76,77;

然后再进行recover即可. 

RMAN> recover datafile noredo;