1.准备测试：
| CREATE TABLESPACE tools DATAFILE '/u01/app/oracle11g/oradata/test/tools01.dbf' SIZE 64M AUTOEXTEND ON NEXT 1M MAXSIZE UNLIMITED LOGGING PERMANENT EXTENT MANAGEMENT LOCAL AUTOALLOCATE BLOCKSIZE 8K SEGMENT SPACE MANAGEMENT AUTO FLASHBACK ON; |
2.在表空间上建立表:
| ALTER USER SCOTT QUOTA UNLIMITED ON TOOLS; create table t1 tablespace tools as select rownum id,'test' name from dual connect by level |
3.备份:
| RMAN> report schema; using target database control file instead of recovery catalog Report of database schema for database with db_unique_name TEST List of Permanent Datafiles =========================== File Size(MB) Tablespace RB segs Datafile Name ---- -------- -------------------- ------- ------------------------ 1 710 SYSTEM *** /u01/app/oracle11g/oradata/test/system01.dbf 2 720 SYSAUX *** /u01/app/oracle11g/oradata/test/sysaux01.dbf 3 85 UNDOTBS1 *** /u01/app/oracle11g/oradata/test/undotbs01.dbf 4 11 USERS *** /u01/app/oracle11g/oradata/test/users01.dbf 5 100 EXAMPLE *** /u01/app/oracle11g/oradata/test/example01.dbf 6 64 RMAN *** /u01/app/oracle11g/oradata/test/rman01.dbf 7 64 TOOLS *** /u01/app/oracle11g/oradata/test/tools01.dbf List of Temporary Files ======================= File Size(MB) Tablespace Maxsize(MB) Tempfile Name ---- -------- -------------------- ----------- -------------------- 1 29 TEMP 32767 /u01/app/oracle11g/oradata/test/temp01.dbf RMAN> backup datafile 7; Starting backup at 2011-12-27 15:30:02 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=13 device type=DISK channel ORA_DISK_1: starting full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set input datafile file number=00007 name=/u01/app/oracle11g/oradata/test/tools01.dbf channel ORA_DISK_1: starting piece 1 at 2011-12-27 15:30:03 channel ORA_DISK_1: finished piece 1 at 2011-12-27 15:30:04 piece handle=/u01/app/oracle11g/flash_recovery_area/TEST/backupset/2011_12_27/o1_mf_nnndf_TAG20111227T153002_7hlwzv9o_.bkp tag=TAG20111227T153002 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 2011-12-27 15:30:04 |
4. 开始测试：
SQL> alter database datafile 7 offline drop;
Database altered.
--假设现在发现干错了，需要恢复，如何操作呢？
| RMAN> restore datafile 7; Starting restore at 2011-12-27 15:33:13 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=13 device type=DISK channel ORA_DISK_1: starting datafile backup set restore channel ORA_DISK_1: specifying datafile(s) to restore from backup set channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle11g/oradata/test/tools01.dbf channel ORA_DISK_1: reading from backup piece /u01/app/oracle11g/flash_recovery_area/TEST/backupset/2011_12_27/o1_mf_nnndf_TAG20111227T153002_7hlwzv9o_.bkp channel ORA_DISK_1: piece handle=/u01/app/oracle11g/flash_recovery_area/TEST/backupset/2011_12_27/o1_mf_nnndf_TAG20111227T153002_7hlwzv9o_.bkp tag=TAG20111227T153002 channel ORA_DISK_1: restored backup piece 1 channel ORA_DISK_1: restore complete, elapsed time: 00:00:03 Finished restore at 2011-12-27 15:33:17 RMAN> recover datafile 7; Starting recover at 2011-12-27 15:33:48 using channel ORA_DISK_1 starting media recovery media recovery complete, elapsed time: 00:00:00 Finished recover at 2011-12-27 15:33:49 RMAN> sql 'alter database datafile 7 online '; sql statement: alter database datafile 7 online |
5.测试数据是否丢失：
15:35:48 SQL> select count(*) from scott.t1;
COUNT(*)
----------
10000
OK，一切正常。一直以为出现这种情况要进行不完成恢复，实际情况不需要。
6.重复测试，改用：
DROP TABLESPACE TOOLS INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS;
实际上这样就不行了。
| RMAN> recover datafile 7; Starting recover at 2011-12-27 15:38:52 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=13 device type=DISK RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of recover command at 12/27/2011 15:38:53 RMAN-20201: datafile not found in the recovery catalog RMAN-06010: error while looking up datafile: 7 |
