Figure: RMAN Channel allocation
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 17
Next log sequence to archive 19
Current log sequence 19
SQL> create table b(name varchar2(100));
Table created.
SQL> insert into b values('**** INSERT BEFORE BACKUP *****');
1 row created.
SQL> commit;
Commit complete.
H:\>set oracle_sid=dba20
H:\>rman
Recovery Manager: Release 10.2.0.1.0 - Production on Mon Jan 18 11:30:00 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
RMAN> connect target sys/sys
connected to target database: DBA20 (DBID=847839442)
RMAN> run{
2> allocate channel c1 type disk;
3> allocate channel c2 type disk;
4> allocate channel c3 type disk;
5> allocate channel c4 type disk;
6> backup database;
7> }
SQL> insert into b values('**** INSERT AFTER BACKUP *****');
1 row created.
SQL> commit;
Commit complete.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
Delete USERS.DBF/SYSTEM.DBF
SQL> startup;
ORACLE instance started.
Total System Global Area 167772160 bytes
Fixed Size 1247876 bytes
Variable Size 71304572 bytes
Database Buffers 88080384 bytes
Redo Buffers 7139328 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\DBA20\SYSTEM01.DBF'
RMAN> run
2> {
3> allocate channel c1 type disk;
4> allocate channel c2 type disk;
5> allocate channel c3 type disk;
6> restore database;
7> recover database;
8> }
SQL> alter database open;
Database altered.
SQL> select * from b;
NAME
-----------------------------------------
**** INSERT BEFORE BACKUP *****
**** INSERT AFTER BACKUP *****
Some Channel Command and Options: