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集团总部的信息部负责人给我打电话说为了找一年前的记录,所以需要对一年前2015年5月1日的数据进行恢复。而2016年初因为进行迁移,所以有些文件可能丢失,手上只有RMAN全备文件,希望在一天之内找回,集团一个副总裁在等着这个数据有急用。
我在电话里面说马上去做,接完电话,想到只有RMAN备份文件,而且是备份的数据文件,没有控制文件没有参数文件的备份,所以普通的
(1)先恢复控制文件restore CONTROLFILE from ‘…bak’;
(2)然后catalog start with ‘/data/2015-05-01/’注册备份文件,
(3)最后restore database;recover database;恢复数据库。
三板斧的常规途径是彻底的行不通了,咋办?咋办?咋办呢?……
@H_404_0@2、先进行数据文件的剥离突然想起以前记得看过关于restoreDATAFILETo数据抽取的操作思路,大概是如果没有控制文件后,可以从RMAN的数据文件备份和归档日志备份里面抽取数据文件,然后重新建立控制文件,再用resetlogs方式打开数据库:
因为抽取命令里面需要填写一个个数据文件,这里有个前提是自己要熟悉自己的oracle实例的文件目录,知道备份的时候oracle实例有多少个数据文件(包括文件存放目录),这样就可以快速的整理出来抽取命令的sql。如果这些都忘记了,还可以去备份日志文件里面去查看check下,一般备份日志文件里面都会有的。
根据以前记录整理下抽取命令:
DECLARE devtype VARCHAR2(256); done Boolean; BEGIN devtype:=sys.DBMS_BACKUP_RESTORE.deviceAllocate (type=>'',IDent=>'t1'); sys.DBMS_BACKUP_RESTORE.restoresetDATAFILE; sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>01,toname=>'/home/oradata/powerdes/system01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>02,toname=>'/home/oradata/powerdes/sysaux01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>03,toname=>'/home/oradata/powerdes/undotbs01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>04,toname=>'/home/oradata/powerdes/users01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>05,toname=>'/home/oradata/powerdes/powerdesk01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>06,toname=>'/home/oradata/powerdes/plas01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>07,toname=>'/home/oradata/powerdes/pl01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>08,toname=>'/home/oradata/powerdes/Help01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>09,toname=>'/home/oradata/powerdes/adobelc01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>10,toname=>'/home/oradata/powerdes/sms01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>11,toname=>'/home/oradata/powerdes/plcrm01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreBACkupPIEce(done=>done,handle=>'/data/2015-05-01/full_POWERDES_20150501_3566.bak',params=>null); sys.DBMS_BACKUP_RESTORE.deviceDeallocate; END; / |
执行过程如下:
[Oracle@pldb236 oradata]$ rlwrap sqlplus / as sysdba sql*Plus: Release 11.2.0.1.0 Production on Mon Oct 17 21:19:32 2016 copyright (C) 1982,2009,Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning,olAP,Data Mining and Real Application TesTing options DECLARE owerdes/system01.dbf'); sys.DBMS_BACKUP_RESTORE.restoreDATAFILETo(dfnumber=>02,toname=>'/home/oradata/powerdes/undotbs01.dbf'); devtype VARCHAR2(256); done Boolean; BEGIN devtype:=sys.DBMS_BACKUP_RESTORE.deviceAllocate (type=>'',params=>null); sys.DBMS_BACKUP_RESTORE.deviceDeallocate; END; 21 / pl/sql procedure successfully completed. sql> |
后台alert日志会显示正在不停的剥离出文件到指定目录里面去:
CKPT started with pID=13,OS ID=23993 @H_74_4@mon Oct 17 21:16:59 2016SMON started with pID=14,OS ID=23995 @H_74_4@mon Oct 17 21:16:59 2016RECO started with pID=15,OS ID=23997 @H_74_4@mon Oct 17 21:16:59 2016 @H_74_4@mMON started with pID=16,OS ID=23999starTing up 1 dispatcher(s) for network address '(ADDRESS=(PARTIAL=YES)(PROTOCol=TCp))'... @H_74_4@mon Oct 17 21:16:59 2016 @H_74_4@mMNL started with pID=17,OS ID=24001starTing up 1 shared server(s) ... OracLE_BASE from environment = /Oracle/app/Oracle @H_74_4@mon Oct 17 21:20:14 2016Full restore complete of DATAFILE 7 to DATAFILE copy /home/oradata/powerdes/pl01.dbf. Elapsed time: 0:00:27 checkpoint is 11106141982 last dealLOCATIOn scn is 11082135537 Full restore complete of DATAFILE 8 to DATAFILE copy /home/oradata/powerdes/Help01.dbf. Elapsed time: 0:00:03 checkpoint is 11106141982 last dealLOCATIOn scn is 9881798870 Full restore complete of DATAFILE 9 to DATAFILE copy /home/oradata/powerdes/adobelc01.dbf. Elapsed time: 0:00:01 checkpoint is 11106141982 @H_74_4@mon Oct 17 21:20:32 2016Full restore complete of DATAFILE 10 to DATAFILE copy /home/oradata/powerdes/sms01.dbf. Elapsed time: 0:00:10 checkpoint is 11106141982 @H_74_4@mon Oct 17 21:21:25 2016Full restore complete of DATAFILE 3 to DATAFILE copy /home/oradata/powerdes/undotbs01.dbf. Elapsed time: 0:01:23 checkpoint is 11106141982 last dealLOCATIOn scn is 11106022955 Undo Optimization current scn is 11106076830 @H_74_4@mon Oct 17 21:22:28 2016Full restore complete of DATAFILE 4 to DATAFILE copy /home/oradata/powerdes/users01.dbf. Elapsed time: 0:02:53 checkpoint is 11106141982 last dealLOCATIOn scn is 11082633897 @H_74_4@mon Oct 17 21:23:47 2016Full restore complete of DATAFILE 11 to DATAFILE copy /home/oradata/powerdes/plcrm01.dbf. Elapsed time: 0:04:11 checkpoint is 11106141982 last dealLOCATIOn scn is 11100156728 @H_74_4@mon Oct 17 21:25:30 2016Full restore complete of DATAFILE 1 to DATAFILE copy /home/oradata/powerdes/system01.dbf. Elapsed time: 0:05:34 checkpoint is 11106141982 last dealLOCATIOn scn is 11039454999 Undo Optimization current scn is 11106076830 @H_74_4@mon Oct 17 21:28:10 2016Full restore complete of DATAFILE 2 to DATAFILE copy /home/oradata/powerdes/sysaux01.dbf. Elapsed time: 0:08:27 checkpoint is 11106141982 last dealLOCATIOn scn is 11101587434 @H_74_4@mon Oct 17 21:29:11 2016Full restore complete of DATAFILE 6 to DATAFILE copy /home/oradata/powerdes/plas01.dbf. Elapsed time: 0:09:33 checkpoint is 11106141982 last dealLOCATIOn scn is 11082142314 |
数据文件抽取成功后,需要单独自己创建控制文件,如果不知道如何创建CONTROLFILE的命令,可以在线上生成trace文件一般默认的控制文件是二进制的,打开来是乱码的 ,备份一个trace出来 可以打开看到语句了,$OracLE_BASE/admin/$oracle_sid/udump目录下,生成的新的 trace 文件里,trace文件有生成控制文件的脚本,使用如下命令alter database BACkup CONTROLFILE to trace as'/Oracle/app/Oracle/admin/powerdes/pfile/control.sql';可以得到创建控制文件的sql命令。
这里有个前提是自己要熟悉自己的oracle实例的文件目录,知道备份的时候oracle实例有多少个数据文件,有多少个redo log文件,这样就可以快速的整理出来创建控制文件的sql。如果这些都忘记了,还可以去备份日志文件里面去查看check下,一般备份日志文件里面都会有的。
整理出来创建控制文件sql命令如下:
(1)命令如下 CREATE CONTROLFILE REUSE SET DATABASE "POWERDES" resetLOGS ARCHIVELOG MAXLOGfileS 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 MAXLOGHISTORY 2920 '/home/oradata/powerdes/system01.dbf', '/home/oradata/powerdes/sysaux01.dbf', '/home/oradata/powerdes/undotbs01.dbf', '/home/oradata/powerdes/users01.dbf', '/home/oradata/powerdes/powerdesk01.dbf', '/home/oradata/powerdes/plas01.dbf', '/home/oradata/powerdes/pl01.dbf', '/home/oradata/powerdes/Help01.dbf', '/home/oradata/powerdes/adobelc01.dbf', '/home/oradata/powerdes/sms01.dbf', '/home/oradata/powerdes/plcrm01.dbf' LOGfile GROUP 1 '/home/oradata/powerdes/redo01.log' SIZE 50M BLOCKSIZE 512, GROUP 2 '/home/oradata/powerdes/redo02.log' SIZE 50M BLOCKSIZE 512, GROUP 3 '/home/oradata/powerdes/redo03.log' SIZE 50M BLOCKSIZE 512 CHaraCTER SET ZHS16GBK; (2)执行过程如下: sql> CREATE CONTROLFILE REUSE SET DATABASE "POWERDES" resetLOGS ARCHIVELOG MAXLOGfileS 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 MAXLOGHISTORY 2920 '/home/oradata/powerdes/system01.dbf', GROUP 3 '/home/oradata/powerdes/redo03.log' SIZE 50M BLOCKSIZE 512 23 CHaraCTER SET ZHS16GBK; Control file created. sql> |
开始执行数据恢复,还是依然在sql窗口里面进行操作的,操作如下:
#(1) 执行recover恢复 sql> recover database using BACkup CONTROLFILE until cancel ; ORA-00279: change 11106141982 generated at 05/01/2015 03:00:08 needed for thread 1 ORA-00289: suggestion : /Oracle/app/Oracle/flash_recovery_area/POWERDES/archivelog/2016_10_17/o1_mf_1_32 117_%u_.arc ORA-00280: change 11106141982 for thread 1 is in sequence #32117 Specify log: {<RET>=suggested | filename | auto | CANCEL} # 这里一般选择输入cancel即可 cancel ORA-10879: error signaled in parallel recovery slave ORA-01547: warning: RECOVER succeeded but OPEN resetLOGS would get error below ORA-01194: file 2 needs more recovery to be consistent ORA-01110: data file 2: '/home/oradata/powerdes/sysaux01.dbf' sql> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01194: file 2 needs more recovery to be consistent ORA-01110: data file 2: '/home/oradata/powerdes/sysaux01.dbf' # 这时,我们无法将数据库打开,一直报ORA-01194错误,说明数据库的SCN号和数据文件的SCN号不一致了。这是因为控制文件我们不是从备份集里面恢复回来的,而是在抽取数据文件后手动建立的控制文件,因此要比数据文件的SCN号要大(甚至特殊情况当前的数据库的会是0)。通过对v$database和v$DATAFILE的checkpoint_change#列的查询,可以确定出本次操作中当前数据库的checkpoint_chenage#为0,两者完全不一致导致通过resetlogs打开数据库异常。
Bty:如果这里当前数据库v$database的值不为0,但是仍然比数据文件v$DATAFILE里面的值大,那么则会不停报ORA-01152错误。 sql> SELEct checkpoint_change# from v$database; ------------------ 0 sql> SELEct file#,checkpoint_change# from v$DATAFILE; ---------- ------------------ 1 1.1106E+10 2 1.1106E+10 3 1.1106E+10 4 1.1106E+10 5 1.1106E+10 6 1.1106E+10 7 1.1106E+10 8 1.1106E+10 9 1.1106E+10 10 1.1106E+10 11 1.1106E+10 11 rows SELEcted. sql> |
文章源地址:http://code.js-code.com/article/p-sbirgpvl-bau.html,未经过作者mchdba(黄杉)允许,谢绝转载。
@R_874_8791@这个时候,就需要我们使用_allow_resetlogs_corruption的隐含参数来处理了。
整个调整的目标是强制启动数据库,设置此参数之后,在数据库Open过程中,Oracle会跳过某些一致性检查,从而使数据库可能跳过不一致状态,Open打开:
# 启动隐含参数 sql> alter system set "_allow_resetlogs_corruption"=true scope=spfile; System altered. sql> # 然后重启数据库,使参数生效,在此基础上再次恢复数据库 sql> shutdown immediate; ORA-01109: database not open Database dismounted. OracLE instance shut down. sql> startup mount; OracLE instance started. @R_833_10586@l System Global Area 6680915968 bytes Fixed Size 2213936 bytes Variable Size 4898949072 bytes Database Buffers 1744830464 bytes Redo Buffers 34922496 bytes Database mounted. sql> recover database using BACkup CONTROLFILE until cancel; ORA-00279: change 11106141982 generated at 05/01/2015 03:00:08 needed for thread 1 ORA-00289: suggestion : /Oracle/app/Oracle/flash_recovery_area/POWERDES/archivelog/2016_10_17/o1_mf_1_32 117_%u_.arc ORA-00280: change 11106141982 for thread 1 is in sequence #32117 Specify log: {<RET>=suggested | filename | auto | CANCEL} cancel ORA-10879: error signaled in parallel recovery slave ORA-01547: warning: RECOVER succeeded but OPEN resetLOGS would get error below ORA-01194: file 2 needs more recovery to be consistent ORA-01110: data file 2: '/home/oradata/powerdes/sysaux01.dbf' # 然后使用resetlogs打开数据库,成功了。 sql> alter database open resetlogs; Database altered. sql> # 然后检查scn,都是统一的了。 SELEct checkpoint_change# from v$database; SELEct file#,checkpoint_change# from v$DATAFILE; |
然后使用业务表数据来判断是否已经恢复成功到这一天,查看后确认成功:
sql> SELECT T2.* from(SELEct t.uiID,t.updated_date from plas.plas_acct t where t.updated_date is not null order by t.updated_date desc ) t2 where rownum <10; UIID updatED_DATE -------------------------------------------------- ------------ wangyu1 01-MAY-15 gaihy 01-MAY-15 xuhl 01-MAY-15 dingchuan1 01-MAY-15 zhangcong 01-MAY-15 chenwh2 01-MAY-15 yuli2 01-MAY-15 zhangxya 01-MAY-15 qiuwj 01-MAY-15 9 rows SELEcted. sql> |
至此,没有控制文件下通过RMAN恢复一年的数据做成了,然后通过expdp导出需要的数据,之后对数据库进行恢复或者重建等等。
参考文章地址:http://blog.itpub.net/11590946/viewspace-750511/
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