巧用Oracle备份集在测试机上做不完全恢复

王朝oracle·作者佚名  2008-06-14
窄屏简体版  字體: |||超大  

如果表的许多分区被意外drop,需要利用带库上的备份集在测试机上做不完全恢复,而具体日期需要达到一个特定的时间,那么我们可以参考下文中的解决方法。

◆首先需要用logminer查出删除语句:

uncompress /oracle/oradata/xxx/xxx.ARC.Z

...

begin

sys.dbms_logmnr.add_logfile('/oracle/oradata/xxx/xxx.ARC');

...

end;

begin sys.dbms_logmnr.start_logmnr(Options => sys.dbms_logmnr.DICT_FROM_ONLINE_CATALOG); end;

create table xsb_logminer_1 as

select timestamp, seg_name,operation, sql_redo

from V$LOGMNR_CONTENTS

where seg_owner='XXX' and operation='DDL' and sql_redo like 'ALTER TABLE XXX DROP PARTITION %';

BEGIN sys.dbms_logmnr.end_logmnr();END;

◆然后在生产库上创建pfile:

create pfile='...' from spfile;

需要从带库上恢复rman备份集至生产机上,将此备份集FTP至测试机上,连同pfile文件.

在测试机上创建与生产机上相同目录,admin ...

在测试机上创建新实例:

orapwd file=... password=xxx

然后修改pfile文件内容,改变control_files内容。

◆启动新实例

export ORACLE_SID=xxx

sqlplus / as sysdba

startup nomount pfile='/home/oracle/init_xxx.ora';

create spfile from pfile='/home/oracle/init_xxx.ora';

exit

RMAN target sys/xxx

restore controlfile from '...';

startup mount

--crosscheck backup;

list backup;

run

{

set newname for datafile 1 to '/oracle/oradata/xxx/system01.dbf';

set newname for datafile 2 to '/oracle/oradata/xxx/undo01.dbf';

set newname for datafile 3 to '/oracle/oradata/xxx/sysaux01.dbf';

set newname for datafile 6 to '/oracle/oradata/xxx/pay_ts01.dbf';

restore datafile 1;

restore datafile 2;

restore datafile 3;

restore datafile 6;

}

(注:发现单个datafile恢复不如整库恢复快!)

sql 'alter database backup controlfile to trace';

shutdown immediate;

exit

然后修改controlfile文件内容,去掉不用的文件名

◆不完全恢复数据库:

sqlplus / as sysdba

startup nomount;

◆重建控制文件

CREATE CONTROLFILE REUSE DATABASE "XXX" RESETLOGS ARCHIVELOG

MAXLOGFILES 40

MAXLOGMEMBERS 3

MAXDATAFILES 400

MAXINSTANCES 2

MAXLOGHISTORY 454

LOGFILE

GROUP 1 (

'/oracle/oradata/xxx/rdb_redo01a'

) SIZE 10M,

GROUP 2 (

'/oracle/oradata/xxx/rdb_redo02a'

) SIZE 10M

DATAFILE

'/oracle/oradata/xxx/system01.dbf',

'/oracle/oradata/xxx/undo01.dbf',

'/oracle/oradata/xxx/sysaux01.dbf',

'/oracle/oradata/xxx/pay_ts01.dbf'

CHARACTER SET ZHS16GBK

;

recover database until cancel using backup controlfile;

...

alter database open resetlogs;

◆做数据恢复操作:

create table xxx as select xxx from xxx where xxx;

exp,ftp .dmp,imp

也可以如下所示,这样会更简单一些:

restore database;

recover database using backup controlfile until cancel;

alter database open resetlogs;

...

END!!!

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
 
 
© 2005- 王朝網路 版權所有 導航