1.主库
[oracle@xag1124a ~]$ sqlplus / as sysdba
SQL> select protection_mode,protection_level,log_mode,open_mode,flashback_on from v$database;
PROTECTION_MODE PROTECTION_LEVEL LOG_MODE OPEN_MODE FLASHBACK_ON
-------------------- -------------------- ------------ ---------------------------
MAXIMUM PERFORMANCE MAXIMUM PERFORMANCE ARCHIVELOG READ WRITE NO
SQL> alter system set log_archive_dest_2='service=db11g_stby LGWR SYNC AFFIRM valid_for=(ONLINE_LOGFILES,primary_role) db_unique_name=DB11G_STBY' scope=both;
SQL> ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE AVAILABILITY;
SQL> select protection_mode,protection_level,log_mode,open_mode,flashback_on from v$database;
PROTECTION_MODE PROTECTION_LEVEL LOG_MODE OPEN_MODE FLASHBACK_ON
-------------------- -------------------- ------------ ---------------------------
MAXIMUM AVAILABILITY RESYNCHRONIZATION ARCHIVELOG READ WRITE NO
2.备库
[oracle@xag1124b ~]$ sqlplus / as sysdba
SQL> select protection_mode,protection_level,log_mode,open_mode,flashback_on from v$database;
PROTECTION_MODE PROTECTION_LEVEL LOG_MODE OPEN_MODE FLASHBACK_ON
-------------------- -------------------- ------------ ------------------------ -------------
MAXIMUM AVAILABILITY MAXIMUM AVAILABILITY ARCHIVELOG READ ONLY WITH APPLY NO
SQL> alter system set log_archive_dest_2='service=db11g_pri LGWR SYNC AFFIRM valid_for=(ONLINE_LOGFILES,primary_role) db_unique_name=DB11G_PRI' scope=both;
SQL> select protection_mode,protection_level,log_mode,open_mode,flashback_on from v$database;
PROTECTION_MODE PROTECTION_LEVEL LOG_MODE OPEN_MODE FLASHBACK_ON
-------------------- -------------------- ------------ -------------------- -------------
MAXIMUM AVAILABILITY MAXIMUM AVAILABILITY ARCHIVELOG READ ONLY WITH APPLY NO
3.主库再次检查
SQL> select protection_mode,protection_level,log_mode,open_mode,flashback_on from v$database;
PROTECTION_MODE PROTECTION_LEVEL LOG_MODE OPEN_MODE FLASHBACK_ON
-------------------- -------------------- ------------ -------------------- -------------
MAXIMUM AVAILABILITY MAXIMUM AVAILABILITY ARCHIVELOG READ WRITE NO