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1.创建保存备份的目录
mkdir /u01/Oracle/oradata/archive/archive
chown -R oracle /u01/oracle/oradata/archive/archive
2. 切换到oracle用户
sqlplus /nolog
connect /as sysdba
3. 设置归档日志 目标地址 查看数据库是否在归档模式SQL> select log_mode from v$database;LOG_MODE
------------------------
NOARCHIVELOG
SQL> show parameter "log_archive_dest_1"
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_1                   string
log_archive_dest_10                  string
log_archive_dest_11                  string
log_archive_dest_12                  string
log_archive_dest_13                  string
log_archive_dest_14                  string
log_archive_dest_15                  string
log_archive_dest_16                  string
log_archive_dest_17                  string
log_archive_dest_18                  string
log_archive_dest_19                  string
SQL> alter system set log_archive_dest_1="location=/u01/oracle/oradata/archive/archive" scope=spfile;
System altered.
SQL> show parameter log_archive_format;NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
log_archive_format                   string      %t_%s_%r.dbf--设置日志文件名称格式 重起数据库后生效
alter system set log_archive_dest_1="location=/u01/oracle/oradata/archive" scope=spfile;SQL> System altered. 
4.关闭数据库
SQL> shutdown immediate;
5. 启动数据库并加载
SQL> startup mount;
6.将数据库切换 为归档模式
SQL> alter database archivelog;
SQL> select log_mode from v$database;
LOG_MODE
------------------------
ARCHIVELOG
7.打开数据库
SQL> alter database open;
8. 切换日志,强迫归档
SQL> alter system switch logfile;
9. SQL> select archiver from v$instance;
ARCHIVER
--------------
STARTED
--查看生成的归档文件全路经
SQL> select name from v$archived_log;NAME
--------------------------------------------------------------------------------
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