SQL>alter system set log_archive_dest=’+LWK/archivelog’ scope=spfile sid=’*‘;
然后关闭两个实例,启动实例,更改数据库为归档模式:
SQL>shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>startup mount;
ORACLE instance started.
Total System Global Area 1258291200 bytes
Fixed Size 1978336 bytes
Variable Size 352325664 bytes
Database Buffers 889192448 bytes
Redo Buffers 14794752 bytes
Database mounted.
SQL>alter database archivelog;
Database altered.
SQL>alter database open;
SQL>archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /opt/oracle/archive
Oldest online log sequence 83
Next log sequence to archive 84
Current log sequence 84
接下来启动另外一个节点,完成归档模式的变更过程。
在 RAC环境下,归档路径的选择是值得斟酌的,如果使用共享的归档目录作为归档路径,则可以减少备份时的复杂性。如果使用独立的目录,则备份时需要进行特殊处理。