MTBF兩次故障的時間，時間越長越好。

MTTR兩次系統恢復的時間，越短越好

修改完參數后若出現報205的錯誤，檢查路徑

控制文件

SQL> show parameter control_files

SQL> select * from v$controlfile;

修改路徑：

$ cd $ORACLE_HOME/dbs

$ cp spfileorcl.ora spfileorcl.ora.bak

SQL> alter system set control_files='/u01/app/oracle/oradata/orcl/control01.ctl', '/home/oracle/control02.ctl' scope=spfile;??????????改參數

SQL> shutdown immediate

$ mv /u01/app/oracle/fast_recovery_area/orcl/control02.ctl /home/oracle/control02.ctl

SQL> startup

SQL> show parameter control_files

SQL> select * from v$controlfile;

增加鏡像：

SQL> alter system set control_files='/u01/app/oracle/oradata/orcl/control01.ctl', '/home/oracle/control02.ctl', '/home/oracle/control03.ctl' scope=spfile;

SQL> shutdown immediate

$ cp /home/oracle/control02.ctl /home/oracle/control03.ctl

SQL> startup

SQL> show parameter control_files

SQL> select * from v$controlfile;

?

日志文件：

增加成員和日志組：

SQL> select GROUP#, SEQUENCE#, STATUS, MEMBERS from v$log;

SQL> select GROUP#, MEMBER from v$logfile;

SQL> alter database add logfile member '/home/oracle/redo01b.log' to group 1;

SQL> alter database add logfile member '/home/oracle/redo02b.log' to group 2;

SQL> alter database add logfile member '/home/oracle/redo03b.log' to group 3;

SQL> alter database add logfile group 4 ('/u01/app/oracle/oradata/orcl/redo04.log', '/home/oracle/redo04b.log') size 50M;

?

FRA：

SQL> show parameter db_recovery

?

backupset: 10GB, ?archived log: 5GB

?

10+5, 10G

?

開啟歸檔模式：為了保證日志的連續性

SQL> archive log list 檢查當前設置

SQL> shutdown immediate

SQL> startup mount

SQL> alter database archivelog;

SQL> alter database open;

SQL> archive log list

SQL> show parameter log_archive_dest

SQL> select group#, sequence#, status, archived from v$log;

SQL> alter system switch logfile;???????????????????切換日志文檔

SQL> select group#, sequence#, status, archived from v$log;

SQL> select NAME, SEQUENCE#, STATUS from v$archived_log;

$ ls /u01/app/oracle/fast_recovery_area/ORCL

?

$ rman target / 或rman target sys/password@orcl

RMAN> show all;???????????????????查看rman自身所有的數據

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP On;

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP clear;??????????????進行清理

RMAN> backup tablespace users;

RMAN> list backup;

SQL> desc v$backup_set 瀏覽器中也可以查看

?

指定備份格式：

RMAN> backup as backupset tablespace users;????????（備份集）

RMAN> backup as compressed backupset tablespace users;????（壓縮備份集）

RMAN> backup as copy tablespace users;??????（鏡像拷貝）

RMAN> list backup of tablespace users;

RMAN> list copy of tablespace users;

?

轉載于:https://www.cnblogs.com/m4116/p/7359666.html

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