在recover datafile的过程当中如果丢失了需要的归档将使得recover无法进行，使用bbed工具可以跳过丢失的归档进行recover datafile。

实验过程如下：

SYS@ORCL>select * from v$version;

BANNER

----------------------------------------------------------------

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod

PL/SQL Release 10.2.0.1.0 - Production

CORE 10.2.0.1.0 Production

TNS for Linux: Version 10.2.0.1.0 - Production

NLSRTL Version 10.2.0.1.0 - Production

SYS@ORCL>create tablespace bbed_test_tbs

2 datafile '/u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf' size 20M;

Tablespace created.

SYS@ORCL>create table bbed_test1 tablespace bbed_test_tbs as select * from dba_objects;

Table created.

SYS@ORCL>create table bbed_test2 tablespace bbed_test_tbs as select * from dba_objects;

Table created.

SYS@ORCL>archive log list

Database log mode Archive Mode

Automatic archival Enabled

Archive destination USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence 2

Next log sequence to archive 4

Current log sequence 4

SYS@ORCL>select file#||' '||name||' '||bytes from v$datafile;

FILE#||''||NAME||''||BYTES

--------------------------------------------------------------------------------

1 /u01/app/oracle/oradata/ORCL/system01.dbf 503316480

2 /u01/app/oracle/oradata/ORCL/undotbs01.dbf 36700160

3 /u01/app/oracle/oradata/ORCL/sysaux01.dbf 262144000

4 /u01/app/oracle/oradata/ORCL/users01.dbf 5242880

5 /u01/app/oracle/oradata/ORCL/example01.dbf 104857600

6 /u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf 20971520

6 rows selected.

使用rman备份datafile 6

[oracle@jp bbed]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Thu Jun 19 21:33:16 2014

Copyright (c) 1982, 2005, Oracle. All rights reserved.

connected to target database: ORCL (DBID=1356549586)

RMAN> backup datafile 6;

Starting backup at 19-JUN-14

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=143 devtype=DISK

channel ORA_DISK_1: starting full datafile backupset

channel ORA_DISK_1: specifying datafile(s) in backupset

input datafile fno=00006 name=/u01/app/oracle/oradata/ORCL/bbed_test_tbs01.dbf

channel ORA_DISK_1: starting piece 1 at 19-JUN-14

channel ORA_DISK_1: finished piece 1 at 19-JUN-14

piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2014_06_19/o1_mf_nnndf_TAG20140619T213426_9t73x2s8_.bkp tag=TAG20140619T213426 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03

Finished backup at 19-JUN-14

然后在库里修改datafile 6中存储的数据

SYS@ORCL>delete from bbed_test1;

50316 rows deleted.

SYS@ORCL>commit;?

Commit complete.?

SYS@ORCL>alter system switch logfile;?

System altered.?

SYS@ORCL>alter system switch logfile;?

System altered.?

SYS@ORCL>alter system switch logfile;?

System altered.?

然后关闭数据库删除datafile 6

SYS@ORCL>shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.?

[oracle@jp ORCL]$ ls

bbed_test_tbs01.dbf control03.ctl redo02.log system01.dbf users01.dbf

control01.ctl example01.dbf redo03.log temp01.dbf

control02.ctl redo01.log sysaux01.dbf undotbs01.dbf

[oracle@jp ORCL]$ mv bbed_test_tbs01.dbf bbed_test_tbs01.dbf.bak

启动数据库：

SYS@ORCL>startup

ORACLE instance started.?

Total System Global Area 285212672 bytes

Fixed Size 1218992 bytes