Set archive and non-archive modes in Oracle

-, View oracle archive mode SQLgt; connevanevan (dba) Connected. SQLgt; archiveloglistORA-01031: insufficientprivilegesS

-, View oracle archive mode SQLgt; conn evan/evan (dba) Connected. SQLgt; archive log listORA-01031: insufficient privilegesS

-View the Oracle archiving Mode
SQL> conn evan/evan (dba)
Connected.
SQL> archive log list
ORA-01031: insufficient privileges

SQL> conn/as sysdba -- archive log list must be executed by sysdba
Connected.
SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 2
Current log sequence 4
Query v $ database
SQL> select name, log_mode from v $ database;

NAME LOG_MODE
---------------------
ORALIFE NOARCHIVELOG

Ii. Modify the archive Mode
Archive log location. Oracle 10 Gb can generate multiple identical logs and store multiple locations to prevent unexpected logs.
SQL> alter system set log_archive_dest_1 = 'location =/oracle/10g/oracle/log/archive_log ';

System altered.

SQL> alter system set log_archive_dest_2 = 'location =/oracle/10g/oracle/log/archive_log2 ';

System altered.

SQL> shutdown immediate
ORA-01031: insufficient privileges
SQL> conn/as sysdba
Connected.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.

Total System Global Area 528482304 bytes
Fixed Size 1220360 bytes
Variable Size 163578104 bytes
Database Buffers 356515840 bytes
Redo Buffers 7168000 bytes
Database mounted.
SQL> alter database archivelog; -- sets the archive mode.

Database altered.

SQL> alter database open;

Database altered.

Configure the archive file format (starting from oracle 10 Gb, it must contain % s, % t, % r)
SQL> alter system set log_archive_format = "archive _ % t _ % s _ % r. arclog" scope = spfile;

System altered.

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.

Total System Global Area 528482304 bytes
Fixed Size 1220360 bytes
Variable Size 163578104 bytes
Database Buffers 356515840 bytes
Redo Buffers 7168000 bytes
Database mounted.
SQL> archive log list -- check whether archive exists
Database log mode Archive Mode
Automatic archival Enabled -- Automatic archiving Enabled
Archive destination/oracle/10g/oracle/log/archive_log2
Oldest online log sequence 2
Next log sequence to archive 4
Current log sequence 4

SQL> select destination from v $ archive_dest; -- view the location of the archived log

DESTINATION
--------------------------------------------------------------------------------
/Oracle/10g/oracle/log/archive_log
/Oracle/10g/oracle/log/archive_log2

10 rows selected.

You can also configure the number of archiving processes
Alter system set log_archive_max_processes = n