表的许多分区被意外0drop用rman不完全恢复
文章作者 100test 发表时间 2008:02:01 15:14:53
来源 100Test.Com百考试题网
如果表的很多分区被意外0drop,需要利用带库上的备份集在测试机上做不完全恢复,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。
◆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
0select 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 0select xxx from xxx where xxx.
exp,ftp .dmp,imp |
也可以如下所示,这样可以更简单一点:
restore database.
recover database using backup controlfile until cancel.
alter database open resetlogs.
...
END |