oracle:rman恢复----通过时间set until time
试验计划:先做一个0级备份,再创建一个表,插入几条数据,最后删除表,然后通过rman把该表的数据恢复。
试验环境:在归档模式,oracle10.2.0.1
开始试验:
1.rman level 0备份
RMAN> backup incremental level 0 database; Starting backup at -DEC-
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid= devtype=DISK
channel ORA_DISK_1: starting incremental level datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno= name=/u01/app/oracle/product/10.2./db_2/oradata/orcl/system01.dbf
input datafile fno= name=/u01/app/oracle/product/10.2./db_2/oradata/orcl/sysaux01.dbf
input datafile fno= name=/u01/app/oracle/product/10.2./db_2/oradata/orcl/undotbs01.dbf
input datafile fno= name=/u01/app/oracle/product/10.2./db_2/oradata/orcl/yn.dbf
input datafile fno= name=/u01/app/oracle/product/10.2./db_2/oradata/orcl/users01.dbf
channel ORA_DISK_1: starting piece at -DEC-
channel ORA_DISK_1: finished piece at -DEC-
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd0_TAG20131202T211658_99s22c7o_.bkp tag=TAG20131202T211658 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: ::
channel ORA_DISK_1: starting incremental level datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: starting piece at -DEC-
channel ORA_DISK_1: finished piece at -DEC-
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_ncsn0_TAG20131202T211658_99s252by_.bkp tag=TAG20131202T211658 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: ::
Finished backup at -DEC-
2.创建表
SQL> create table t1(id int,name varchar2()); Table created. SQL> insert into t1 values(,'first'); row created. SQL> commit; SQL> insert into t1 values(,'second'); row created. SQL> commit; Commit complete. SQL> alter system switch logfile; System altered. SQL> select * from t1; ID NAME
---------- --------------------
first
second
3.查询当前系统时间
SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual; TO_CHAR(SYSDATE,'YY
-------------------
-- ::
4.删除表,关闭数据库,重启数据库
SQL> drop table t1; Table dropped. SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started. Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
Database Buffers bytes
Redo Buffers bytes
Database mounted.
SQL> select status from v$instance; STATUS
------------
MOUNTED
5.rman恢复
RMAN> run{
2> allocate channel c1 type disk;
3> set until time "to_date('2013-12-02 21:41:55','yyyy-mm-dd hh24:mi:ss')";
4> restore database;
5> recover database;
6> sql 'alter database open resetlogs';
> } allocated channel: c1
channel c1: sid= devtype=DISK executing command: SET until clause Starting restore at -DEC- channel c1: starting datafile backupset restore
channel c1: specifying datafile(s) to restore from backup set
restoring datafile to /u01/app/oracle/product/10.2./db_2/oradata/orcl/system01.dbf
restoring datafile to /u01/app/oracle/product/10.2./db_2/oradata/orcl/undotbs01.dbf
restoring datafile to /u01/app/oracle/product/10.2./db_2/oradata/orcl/sysaux01.dbf
restoring datafile to /u01/app/oracle/product/10.2./db_2/oradata/orcl/users01.dbf
restoring datafile to /u01/app/oracle/product/10.2./db_2/oradata/orcl/yn.dbf
channel c1: reading from backup piece /u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd0_TAG20131202T211658_99s22c7o_.bkp
channel c1: restored backup piece
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd0_TAG20131202T211658_99s22c7o_.bkp tag=TAG20131202T211658
channel c1: restore complete, elapsed time: ::
Finished restore at -DEC- Starting recover at -DEC- starting media recovery archive log thread sequence is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_56_99s2jvny_.arc
archive log thread sequence is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_57_99s2lpbk_.arc
archive log thread sequence is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_58_99s3d5ph_.arc
archive log thread sequence is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_1_99s3j6fg_.arc
archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_56_99s2jvny_.arc thread= sequence=
archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_57_99s2lpbk_.arc thread= sequence=
archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/archivelog/2013_12_02/o1_mf_1_58_99s3d5ph_.arc thread= sequence=
media recovery complete, elapsed time: ::
Finished recover at -DEC- sql statement: alter database open resetlogs
released channel: c1 RMAN>
6.查询被删除的数据
SQL> select * from t1; ID NAME
---------- --------------------
first
second SQL>
7.重新备份数据库
在生产环境中,不完全恢复后,是要用rman重新备份的。因为该备份是以后数据恢复的一个起点。
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