DG快照备库

1.使用快照先决条件：主备库开启闪回功能

2.把备库转为快照库

DGMGRL> convert database satest to SNAPSHOT STANDBY;
Converting database "satest" to a Snapshot Standby database, please wait...
Database "satest" converted successfully

3.把快照库转回物理备库

DGMGRL> convert database satest to PHYSICAL STANDBY;
Converting database "satest" to a Physical Standby database, please wait...
Operation requires shutdown of instance "atest" on database "satest"
Shutting down instance "atest"...
Database closed.
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "atest" on database "satest"
Starting instance "atest"...
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.
Database mounted.
Continuing to convert database "satest" ...
Operation requires shutdown of instance "atest" on database "satest"
Shutting down instance "atest"...
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "atest" on database "satest"
Starting instance "atest"...
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.
Database mounted.
Database "satest" converted successfully

4.小结：