| 订阅 | 在线投稿
分享
 
 
 

巧用Oracle备份集在测试机上做不完全恢复

来源:互联网  宽屏版  评论
2008-06-14 05:54:18

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!!!

 
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!!!
󰈣󰈤
 
 
 
>>返回首页<<
 
 热帖排行
 
 
 
静静地坐在废墟上,四周的荒凉一望无际,忽然觉得,凄凉也很美
©2005- 王朝网络 版权所有