知识大全无备份丢失部分数据文件和控制文件恢复

Posted 2022-07-16 文件

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　　前提:

　　需要有除丢失文件以外其他文件的备份

　　丢失的文件需要是在其他文件备份后创建的

　　所有其他文件备份后的归档都在存在

　　恢复步骤:

　　拷贝任一未丢失文件的备份回来

　　创建新控制文件但控制文件不包括丢失的数据文件

　　进行恢复

　　碰到

　　ORA : recovery session canceled due to errors ORA : unnamed datafile(s) added to controlfile by media recovery ORA : data file : D:\\ORACLE\\ORADATA\\xxxx\\xxxx DBF

　　 select name from v$datafile找出uname file

　　 alter database create datafile D:\\ORACLE\\ORA \\DATABASE\\UNNAMEDxxxxx as D:\\ORACLE\\ORADATA\\ xxxx\\xxxx DBF ;

　　继续恢复

　　恢复完成打开

　　可能会遇到的问题:

　　如果没有拷贝备份回来直接重建不包含丢失文件的控制文件时可以打开数据库但丢失的文件会显示成missingxxxx的file name 这时候就会不能恢复

　　试验过程:

　　Microsoft Windows XP [版本 ]

　　C:\\Documents and Settings\\qigong>oradim startup sid test

　　C:\\Documents and Settings\\qigong>sqlplus / as sysdba

　　SQL*Plus: Release Production on 星期三月 : :

　　Connected to: Oracle Database g Enterprise Edition Release Production With the Partitioning OLAP and Data Mining options

　　SQL> shutdown immediate; Database closed Database dismounted ORACLE instance shut down SQL> exit Disconnected from Oracle Database g Enterprise Edition Release Producti With the Partitioning OLAP and Data Mining options

　　C:\\Documents and Settings\\qigong>sqlplus / as sysdba

　　SQL*Plus: Release Production on 星期三月 : :

　　Connected to an idle instance

　　SQL> startup nomount; ORACLE instance started

　　Total System Global Area bytes Fixed Size bytes Variable Size bytes Database Buffers bytes Redo Buffers bytes SQL> alter database mount; alter database mount * ERROR at line : ORA : error in identifying controlfile check alert log for more info

　　SQL> shutdown ORA : database not mounted

　　ORACLE instance shut down SQL> startup ORACLE instance started

　　Total System Global Area bytes Fixed Size bytes Variable Size bytes Database Buffers bytes Redo Buffers bytes Database mounted Database opened SQL> alter system switch logfile;

　　System altered

　　SQL> /

　　System altered

　　SQL> /

　　System altered

　　SQL> create tablespace test datafile c:\\test dbf size m extent management local segment space management auto uniform size k;

　　Tablespace created

　　SQL> insert into testlost values( );

　　 row created

　　SQL> mit;

　　Commit plete

　　SQL> create table testlost (a number) tablespace test ;

　　Table created

　　SQL> shutdown immediate; Database closed Database dismounted ORACLE instance shut down SQL> startup nomount ORACLE instance started

　　Total System Global Area bytes Fixed Size bytes Variable Size bytes Database Buffers bytes Redo Buffers bytes

　　C:\\Documents and Settings\\qigong>rman

　　Recovery Manager: Release Production

　　RMAN> connect target

　　connected to target database: test (not mounted)

　　RMAN> restore controlfile from autobackup;

　　Starting restore at 月 using target database controlfile instead of recovery catalog allocated channel: ORA_DISK_ channel ORA_DISK_ : sid= devtype=DISK

　　recovery area destination: C:\\oracle\\product\\ \\flash_recovery_area database name (or lock name space) used for search: TEST channel ORA_DISK_ : autobackup found in the recovery area channel ORA_DISK_ : autobackup found: C:\\ORACLE\\PRODUCT\\ \\FLASH_RECOVERY_AREA\\TEST\\AUTOBACKUP\\ _ _ \\O _MF_S_ _ LOS FCX_ BKP channel ORA_DISK_ : controlfile restore from autobackup plete output filename=C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\CONTROL CTL output filename=C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\CONTROL CTL output filename=C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\CONTROL CTL Finished restore at 月

　　RMAN> exit

　　RMAN : WARNING: unable to generate V$RMAN_STATUS or V$RMAN_OUTPUT row RMAN : WARNING: disabling update of the V$RMAN_STATUS and V$RMAN_OUTPUT rows

　　SQL> alter database mount; alter database mount * ERROR at line : ORA : invalid password file C:\\oracle\\product\\ \\Db_ \\DATABASE\\PWDtest ORA

　　SQL> DECLARE devtype varchar ( ); done boolean; BEGIN devtype:=sys dbms_backup_restore deviceAllocate (type=> ident=> ); sys dbms_backup_restore restoreSetDatafile; sys dbms_backup_restore restoreDatafileTo(dfnumber=> toname=> c:\\test DBF ); sys dbms_backup_restore restoreBackupPiece(done=>done handle=> C:\\ FUAT K_ _ _ sys dbms_backup_restore deviceDeallocate; END; /

　　PL/SQL procedure successfully pleted

　　SQL> shutdown immediate; ORA : database not open Database dismounted ORACLE instance shut down SQL> startup nomount ORACLE instance started

　　Total System Global Area bytes Fixed Size bytes Variable Size bytes Database Buffers bytes Redo Buffers bytes SQL> CREATE CONTROLFILE REUSE DATABASE TEST NORESETLOGS ARCHIVELOG MAXLOGFILES MAXLOGMEMBERS MAXDATAFILES MAXINSTANCES MAXLOGHISTORY LOGFILE GROUP C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\REDO LOG SIZE M GROUP C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\REDO LOG SIZE M GROUP C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\REDO LOG SIZE M STANDBY LOGFILE DATAFILE C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\SYSTEM DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\UNDOTBS DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\SYSAUX DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\USERS DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\EXAMPLE DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TEST DBF CHARACTER SET ZHS GBK ;

　　Control file created

　　SQL> recover database; ORA : change generated at / / : : needed for thread ORA : suggestion : C:\\ORACLE\\ARCHIVE\\ARC _ ORA : change for thread is in sequence #

　　Specify log: <RET>=suggested | filename | AUTO | CANCEL auto ORA : recovery session canceled due to errors ORA : unnamed datafile(s) added to controlfile by media recovery ORA : data file : C:\\TEST DBF

　　ORA : media recovery not started

　　SQL> select name from v$datafile;

　　NAME C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\SYSTEM DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\UNDOTBS DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\SYSAUX DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\USERS DBF C:\\ORACLE\\PRODUCT\\ \\ORADATA\\TEST\\EXAMPLE DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF C:\\TBS DBF

　　NAME C:\\TBS DBF C:\\TBS DBF C:\\TEST DBF C:\\WINDOWS\\SYSTEM \\UNNAMED

　　 rows selected

　　SQL> alter database create datafile C:\\WINDOWS\\SYSTEM \\UNNAMED as c:\\test db

　　Database altered

　　SQL> recover database; Media recovery plete SQL> alter database open;

　　Database altered

　　SQL> select * from testlost ;

　　no rows selected

　　SQL> select * from testlost;

　　A 在上面这个试验里面我们可能还会有一个疑问既然控制文件里面记载的是unamedxxxxxxx的文件名数据字典的里面的filename也是 unamedxxxxxxx(实际上数据字典里面不保存文件名所有的文件名都只包含在控制文件当中) 日志里也是没有记载文件名那么当我们 recover database的时候为什么会出现

　　ORA : recovery session canceled due to errors

　　ORA : unnamed datafile(s) added to controlfile by media recovery

　　ORA : data file : C:\\TEST DBF

　　ORA : media recovery not started

　　Oracle他是从哪里得到这个unamedxxxxxxx文件的真实文件是 C:\\TEST DBF 呢？

　　先来看看日志里记载了什么东西

　　用logminer查一下

　　EXECUTE DBMS_LOGMNR_D BUILD(dictionary_filename => l_dictionary ora dictionary_location => /disk /oradata/ );

　　EXECUTE DBMS_LOGMNR ADD_LOGFILE( LogFileName => /disk /oradata/redo log Options => dbms_logmnr NEW);

　　EXECUTE DBMS_LOGMNR START_LOGMNR(DictFileName => /disk /oradata/l_dictionary ora );

　　SELECT sql_redo FROM V$LOGMNR_CONTENTS where upper(sql_redo) like %TEST% ;

　　SQL_REDO create tablespace test datafile c:\\test dbf size m reuse extent management local segment space management auto uniform size k; 只发现了这句ddl 并没有往数据字典里插入文件名

　　再来看create tablespace的trace文件 …… insert into ts$ (ts# name online$ contents$ undofile# undoblock# blocksize dflmaxext dflinit dflincr dflextpct dflminext dflminlen inc# owner# scnwrp scnbas pitrscnwrp pitrscnbas dflogging affstrength bitmapped plugged directallowed flags spare spare ) values (: : : : : : : : : : : : : : : : : : : : : : : : )

　　insert into file$ (file# blocks ts# status$ relfile# maxextend inc crscnwrp crscnbas spare ) values (: : DECODE(: NULL : ) : DECODE(: NULL : ) : : : : DECODE(: NULL : )) ……

　　这两条语句说明了oracle在ts$ file$分别插入了新创建表空间和文件的信息但并不包括文件名

　　看起来好像这个文件名是无出处的即不直接取至日志也不存在于数据字典控制文件中则存在着错误的文件名那他究竟从哪里来呢？

　　看下控制文件中包含这个文件的dump 信息

　　DATA FILE # : (name # ) C:\\WINDOWS\\SYSTEM \\UNNAMED creation size= block size= status= x head= tail= dup= tablespace index= krfil= prev_file= unrecoverable scn: x / / : : Checkpoint cnt: scn: x d e / / : : Stop scn: x d e / / : : Creation Checkpointed at scn: x c / / : :

cha138/Article/program/Oracle/201311/16821

知识大全 无备份丢失部分数据文件和控制文件恢复

知识大全无备份丢失部分数据文件和控制文件恢复