进行测试之前先将数据库做全备
引用
RMAN> run {
> allocate channel ch device type disk;
> backup database include current controlfile format /backup/full%t tag=FULLDB;
> sql alter system archive log current;
> backup archivelog all format /backup/arch%t tag=ARCHIVELOG;
> release channel ch;
> }
allocated channel: ch
channel ch: sid= devtype=DISK
Starting backup at JAN
channel ch: starting full datafile backupset
channel ch: specifying datafile(s) in backupset
including current controlfile in backupset
input datafile fno= name=/app/oracle/oradata/orai/systemdbf
input datafile fno= name=/app/oracle/oradata/orai/undotbsdbf
input datafile fno= name=/app/oracle/oradata/orai/exampledbf
input datafile fno= name=/app/oracle/oradata/orai/STREAMdbf
input datafile fno= name=/app/oracle/oradata/orai/xdbdbf
input datafile fno= name=/app/oracle/oradata/orai/indxdbf
input datafile fno= name=/app/oracle/oradata/orai/usersdbf
input datafile fno= name=/app/oracle/oradata/orai/cwmlitedbf
input datafile fno= name=/app/oracle/oradata/orai/drsysdbf
input datafile fno= name=/app/oracle/oradata/orai/odmdbf
input datafile fno= name=/app/oracle/oradata/orai/toolsdbf
channel ch: starting piece at JAN
channel ch: finished piece at JAN
piece handle=/backup/full comment=NONE
channel ch: backup set complete elapsed time: ::
Finished backup at JAN
Starting Control File and SPFILE Autobackup at JAN
piece handle=/app/oracle/product//dbs/c comment=NONE
Finished Control File and SPFILE Autobackup at JAN
sql statement: alter system archive log current
Starting backup at JAN
current log archived
channel ch: starting archive log backupset
channel ch: specifying archive log(s) in backup set
input archive log thread= sequence= recid= stamp=
input archive log thread= sequence= recid= stamp=
input archive log thread= sequence= recid= stamp=
channel ch: starting piece at JAN
channel ch: finished piece at JAN
piece handle=/backup/arch comment=NONE
channel ch: backup set complete elapsed time: ::
Finished backup at JAN
Starting Control File and SPFILE Autobackup at JAN
piece handle=/app/oracle/product//dbs/c comment=NONE
Finished Control File and SPFILE Autobackup at JAN
released channel: ch
假设现在数据库异常宕机
引用
SQL> shutdown abort
ORACLE instance shut down
启动数据库至nomount状态
引用
SQL> startup nomount
ORACLE instance started
Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
Database Buffers bytes
Redo Buffers bytes
利用dbms_backup_restore恢复控制文件
SQL> DECLARE
devtype varchar();
done boolean;
BEGIN
devtype := dbms_backup_restoreDeviceAllocate(type => ident => testctl);
dbms_backup_restoreRestoresetdataFile;
dbms_backup_restoreRestoreControlFileto(/app/oracle/oradata/orai/controlctl);
dbms_backup_restoreRestoreBackupPiece(/backup/full′done => done);
dbms_backup_restoreRestoresetdataFile;
dbms_backup_restoreRestoreControlFileto(/app/oracle/oradata/orai/controlctl);
dbms_backup_restoreRestoreBackupPiece(/backup/full′done => done);
dbms_backup_restoreRestoresetdataFile;
dbms_backup_restoreRestoreControlFileto(/app/oracle/oradata/orai/controlctl);
dbms_backup_restoreRestoreBackupPiece(/backup/full′done => done);
dbms_backup_restoreDeviceDeallocate;
END;
/
PL/SQL procedure successfully completed
当然也已可用rman进行控制文件恢复
引用
RMAN> restore controlfile from /app/oracle/product//dbs/c′;
Starting restore at JAN
using channel ORA_DISK_
channel ORA_DISK_: restoring controlfile
channel ORA_DISK_: restore complete
replicating controlfile
input filename=/app/oracle/oradata/orai/controlctl
output filename=/app/oracle/oradata/orai/controlctl
output filename=/app/oracle/oradata/orai/controlctl
Finished restore at JAN
利用dbms_backup_restore恢复数据文件
引用
SQL> DECLARE
devtype varchar();
done boolean;
BEGIN
devtype := dbms_backup_restoreDeviceAllocate (type => ident => testdatafile);
dbms_backup_restoreRestoreSetDatafile;
dbms_backup_restoreRestoreDatafileTo(dfnumber => toname => /app/oracle/oradata/orai/systemdbf);
dbms_backup_restoreRestoreDatafileTo(dfnumber => toname => /app/oracle/oradata/orai/undotbsdbf);
dbms_backup_restoreRestoreBackupPiece(done => donehandle => /backup/full′ params => null);
dbms_backup_restoreDeviceDeallocate;
END;
/
PL/SQL procedure successfully completed
利用dbms_backup_restore恢复归档日志
引用
SQL> DECLARE
devtype varchar();
done boolean;
BEGIN
devtype := dbms_backup_restoreDeviceAllocate (type => ident => testarchlog);
dbms_backup_restoreRestoreSetArchivedLog(destination=>/app/oracle/product//dbs/arch);
dbms_backup_restoreRestoreArchivedLog(thread=>sequence=>);
dbms_backup_restoreRestoreArchivedLog(thread=>sequence=>);
dbms_backup_restoreRestoreArchivedLog(thread=>sequence=>);
dbms_backup_restoreRestoreBackupPiece(done => donehandle => /backup/arch′ params => null);
dbms_backup_restoreDeviceDeallocate;
END;
/
PL/SQL procedure successfully completed
不完全恢复打开数据库
引用
SQL> alter database mount;
Database altered
SQL> recover database using backup controlfile;
ORA: change generated at // :: needed for thread
ORA: suggestion : /app/oracle/product//dbs/arch/_dbf
ORA: change for thread is in sequence #
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
auto
ORA: change generated at // :: needed for thread
ORA: suggestion : /app/oracle/product//dbs/arch/_dbf
ORA: change for thread is in sequence #
ORA: log file /app/oracle/product//dbs/arch/_dbf no longer
needed for this recovery
ORA: change generated at // :: needed for thread
ORA: suggestion : /app/oracle/product//dbs/arch/_dbf
ORA: change for thread is in sequence #
ORA: log file /app/oracle/product//dbs/arch/_dbf no longer
needed for this recovery
ORA: cannot open archived log
/app/oracle/product//dbs/arch/_dbf
ORA: unable to obtain file status
Linux Error: : No such file or directory
Additional information:
SQL> recover database using backup controlfile until cancel;
ORA: change generated at // :: needed for thread
ORA: suggestion : /app/oracle/product//dbs/arch/_dbf
ORA: change for thread is in sequence #
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/app/oracle/oradata/orai/redolog
Log applied
Media recovery complete
