[每日一题] 11gOCP 1z0-052 :2013-09-8 用户管理下的热备报错:ORA-01123.................................A45

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正确答案:B

 

做热备的前提条件是一定要开归档,可以用以下几种方式查一下有没有开归档:

   方法一:

sys@OCM> archive log list; Database log mode             No Archive Mode Automatic archival               Disabled Archive destination            /arch Oldest online log sequence     2 Next log sequence to archive   4 Current log sequence           4 

 方法二:查视图

sys@OCM> select log_mode from v$database;  LOG_MODE ------------ NOARCHIVELOG 

方法三:转出CONTROLFILE的创建脚本:

sys@OCM> alter database backup controlfile to trace as '/tmp/control.txt';  Database altered. CREATE CONTROLFILE REUSE DATABASE "OCM" NORESETLOGS  NOARCHIVELOG     MAXLOGFILES 16     MAXLOGMEMBERS 3     MAXDATAFILES 100     MAXINSTANCES 8     MAXLOGHISTORY 292 LOGFILE   GROUP 1 '/u01/app/oracle/oradata/ocm/redo01.log'  SIZE 50M BLOCKSIZE 512,   GROUP 2 '/u01/app/oracle/oradata/ocm/redo02.log'  SIZE 50M BLOCKSIZE 512,   GROUP 3 '/u01/app/oracle/oradata/ocm/redo03.log'  SIZE 50M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE   '/u01/app/oracle/oradata/ocm/system01.dbf',   '/u01/app/oracle/oradata/ocm/sysaux01.dbf',   '/u01/app/oracle/oradata/ocm/undotbs01.dbf',   '/u01/app/oracle/oradata/ocm/users01.dbf',   '/u01/app/oracle/oradata/ocm/example01.dbf',   '/u01/app/oracle/oradata/ocm/gyj01.dbf',   '/u01/app/oracle/oradata/ocm/gyj02.dbf',   '/u01/app/oracle/oradata/ocm/tp01.dbf' CHARACTER SET ZHS16GBK ; 

提供用户管理热备的脚本:

sys@OCM>  SELECT 'alter tablespace '||tablespace_name||' begin backup;'||chr(10)||   2   '!cp '||file_name||' /backup/hot'||chr(10)||   3    'alter tablespace '||tablespace_name||' end backup;'    4   FROM dba_data_files;  'ALTERTABLESPACE'||TABLESPACE_NAME||'BEGINBACKUP;'||CHR(10)||'!CP'||FILE_NAME||'/BACKUP/HOT'||CHR(10)||'ALTERTABLESPACE'||TABLESPACE_NAME||'ENDBACKUP;' --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- alter tablespace TP1 begin backup; !cp /u01/app/oracle/oradata/ocm/tp01.dbf /backup/hot alter tablespace TP1 end backup;  alter tablespace GYJ begin backup; !cp /u01/app/oracle/oradata/ocm/gyj02.dbf /backup/hot alter tablespace GYJ end backup;  alter tablespace GYJ begin backup; !cp /u01/app/oracle/oradata/ocm/gyj01.dbf /backup/hot alter tablespace GYJ end backup;  alter tablespace EXAMPLE begin backup; !cp /u01/app/oracle/oradata/ocm/example01.dbf /backup/hot alter tablespace EXAMPLE end backup;  alter tablespace USERS begin backup; !cp /u01/app/oracle/oradata/ocm/users01.dbf /backup/hot alter tablespace USERS end backup;  alter tablespace UNDOTBS1 begin backup; !cp /u01/app/oracle/oradata/ocm/undotbs01.dbf /backup/hot alter tablespace UNDOTBS1 end backup;  alter tablespace SYSAUX begin backup; !cp /u01/app/oracle/oradata/ocm/sysaux01.dbf /backup/hot alter tablespace SYSAUX end backup;  alter tablespace SYSTEM begin backup; !cp /u01/app/oracle/oradata/ocm/system01.dbf /backup/hot alter tablespace SYSTEM end backup;  

对于用户管理下热备的底层原理在以后的题目中到再来解析。。。

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