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dbms_backup_restore Package

2024-08-16 16:15:00   222人阅读

在数据库恢复的过程中如果有rman备份集，可以使用dbms_backup_restore包从备份集中还原文件，下面的例子说明所有控制文件损坏、某个数据文件丢失，有数据文件备份集的情况下如何恢复数据库： DB：Oracle 11g 11.2.0.3.0 X86_64,OS RHEL 6.3 X86_64,未使用Recovery Catalog 1.关闭控制文件自动备份 RMAN> configure controlfile autobackup off; new RMAN configuration parameters: CONFIGURE CONTROLFILE AUTOBACKUP OFF; new RMAN configuration parameters are successfully stored 2.创建测试表空间 SYS@orcl>create tablespace tstest datafile ‘/u01/app/oracle/oradata/orcl/tstest01.dbf‘ size 10m; Tablespace created. SYS@orcl>select file#,status,name from v$datafile; FILE# STATUS NAME ---------- ------- --------------------------------------------- 1 SYSTEM /u01/app/oracle/oradata/orcl/system01.dbf 2 ONLINE /u01/app/oracle/oradata/orcl/sysaux01.dbf 3 ONLINE /u01/app/oracle/oradata/orcl/undotbs01.dbf 4 ONLINE /u01/app/oracle/oradata/orcl/users01.dbf 5 ONLINE /u01/app/oracle/oradata/orcl/example01.dbf 6 ONLINE /u01/app/oracle/oradata/orcl/tstest01.dbf 6 rows selected. 3.备份数据库 RMAN> backup database; Starting backup at 06-JAN-13 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=15 device type=DISK channel ORA_DISK_1: starting full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set input datafile file number=00001 name=/u01/app/oracle/oradata/orcl/system01.dbf input datafile file number=00002 name=/u01/app/oracle/oradata/orcl/sysaux01.dbf input datafile file number=00005 name=/u01/app/oracle/oradata/orcl/example01.dbf input datafile file number=00003 name=/u01/app/oracle/oradata/orcl/undotbs01.dbf input datafile file number=00006 name=/u01/app/oracle/oradata/orcl/tstest01.dbf input datafile file number=00004 name=/u01/app/oracle/oradata/orcl/users01.dbf channel ORA_DISK_1: starting piece 1 at 06-JAN-13 channel ORA_DISK_1: finished piece 1 at 06-JAN-13 piece handle=/u01/app/oracle/fast_recovery_area/ORCL/backupset/2013_01_06/o1_mf_nnndf_TAG20130106T190623_8glpokbm_.bkp tag=TAG20130106T190623 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:01:36 channel ORA_DISK_1: starting full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set including current control file in backup set including current SPFILE in backup set channel ORA_DISK_1: starting piece 1 at 06-JAN-13 channel ORA_DISK_1: finished piece 1 at 06-JAN-13 piece handle=/u01/app/oracle/fast_recovery_area/ORCL/backupset/2013_01_06/o1_mf_ncsnf_TAG20130106T190623_8glprm9z_.bkp tag=TAG20130106T190623 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 06-JAN-13 4.删除新建表空间的数据文件和破坏控制文件 [oracle@ora orabak]$ rm /u01/app/oracle/oradata/orcl/tstest01.dbf [oracle@ora orabak]$ dd if=/dev/zero of=/u01/app/oracle/oradata/orcl/control01.ctl bs=512K count=10; 10+0 records in 10+0 records out 5242880 bytes (5.2 MB) copied, 0.00571965 s, 917 MB/s [oracle@ora orabak]$ dd if=/dev/zero of=/u01/app/oracle/fast_recovery_area/orcl/control02.ctl bs=512K count=10; 10+0 records in 10+0 records out 5242880 bytes (5.2 MB) copied, 0.00548415 s, 956 MB/s 5.启动数据库到nomount状态 SYS@orcl>startup force nomount; ORACLE instance started. Total System Global Area 1603411968 bytes Fixed Size 2228784 bytes Variable Size 956304848 bytes Database Buffers 637534208 bytes Redo Buffers 7344128 bytes 6.执行dbms_backup_restore包，从备份集中还原数据文件 SYS@orcl>declare devtype varchar2(256); done boolean; begin devtype := dbms_backup_restore.DeviceAllocate (type =>‘‘,ident => ‘t1‘); dbms_backup_restore.RestoreSetDatafile; dbms_backup_restore.RestoreDatafileTo(dfnumber => 6,toname =>‘/u01/app/oracle/oradata/orcl/tstest01.dbf‘); dbms_backup_restore.RestoreBackupPiece(done => done,handle =>‘/u01/app/oracle/fast_recovery_area/ORCL/backupset/2013_01_06/o1_mf_nnndf_TAG20130106T190623_8glpokbm_.bkp‘, params => null); dbms_backup_restore.DeviceDeallocate; end; 7.执行‘create controlfile‘命令创建控制文件 ---因为所有归档日志和在线日志都没有损坏，所以使用‘NORESETLOGS ARCHIVELOG‘创建控制文件 SYS@orcl>CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS ARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 ‘/u01/app/oracle/oradata/orcl/redo01.log‘ SIZE 50M BLOCKSIZE 512, GROUP 2 ‘/u01/app/oracle/oradata/orcl/redo02.log‘ SIZE 50M BLOCKSIZE 512, GROUP 3 ‘/u01/app/oracle/oradata/orcl/redo03.log‘ SIZE 50M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE ‘/u01/app/oracle/oradata/orcl/system01.dbf‘, ‘/u01/app/oracle/oradata/orcl/sysaux01.dbf‘, ‘/u01/app/oracle/oradata/orcl/undotbs01.dbf‘, ‘/u01/app/oracle/oradata/orcl/users01.dbf‘, ‘/u01/app/oracle/oradata/orcl/example01.dbf‘, ‘/u01/app/oracle/oradata/orcl/tstest01.dbf‘ CHARACTER SET AL32UTF8; Control file created. 8.执行‘recover database‘恢复数据库 RMAN> recover database; Starting recover at 06-JAN-13 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=10 device type=DISK starting media recovery unable to find archived log archived log thread=1 sequence=12 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of recover command at 01/06/2013 19:20:11 RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 12 and starting SCN of 1118760 ---提示12号归档日志找不到 ---查询视图，12号redo日志是‘CURRENT‘状态，没有归档 SYS@orcl>select group#,sequence#,a.status,member from v$log a join v$logfile using(group#); GROUP# SEQUENCE# STATUS MEMBER ---------- ---------- ---------------- ---------------------------------------- 1 10 INACTIVE /u01/app/oracle/oradata/orcl/redo01.log 3 12 CURRENT /u01/app/oracle/oradata/orcl/redo03.log 2 11 INACTIVE /u01/app/oracle/oradata/orcl/redo02.log ---在sqlplus下执行‘recover database‘命令 SYS@orcl>recover database using backup controlfile; ORA-00279: change 1118760 generated at 01/06/2013 19:06:23 needed for thread 1 ORA-00289: suggestion : /u01/app/oracle/fast_recovery_area/ORCL/archivelog/2013_01_06/o1_mf_1_12_%u_.arc ORA-00280: change 1118760 for thread 1 is in sequence #12 Specify log: {

dbms_backup_restore Package


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