oracle：rman恢复----通过增量备份来恢复
试验计划：先rman进行一个0级备份，插入表相关数据，再进行level 1级增量备份，进行rman恢复
实验环境：归档模式下，oracle10.2.0.1
开始试验：
1. rman level 0级备份
RMAN> backup incremental level 0 database; Starting backup at 02-DEC-13 using channel ORA_DISK_1 channel ORA_DISK_1: starting incremental level 0 datafile backupset channel ORA_DISK_1: specifying datafile(s) in backupset input datafile fno=00001 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/system01.dbf input datafile fno=00003 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/sysaux01.dbf input datafile fno=00002 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/undotbs01.dbf input datafile fno=00006 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/yn.dbf input datafile fno=00004 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/users01.dbf channel ORA_DISK_1: starting piece 1 at 02-DEC-13 channel ORA_DISK_1: finished piece 1 at 02-DEC-13 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd0_TAG20131202T222739_99s66wc3_.bkp tag=TAG20131202T222739 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:02:06 channel ORA_DISK_1: starting incremental level 0 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 1 at 02-DEC-13 channel ORA_DISK_1: finished piece 1 at 02-DEC-13 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_ncsn0_TAG20131202T222739_99s6bvm4_.bkp tag=TAG20131202T222739 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02 Finished backup at 02-DEC-13
2.插入相关表数据
SQL> select * from t1; ID NAME ---------- -------------------- 1 first 2 second SQL> insert into t1 values(3,'rman3'); 1 row created. SQL> commit; Commit complete. SQL> insert into t1 values(4,'rman4'); 1 row created. SQL> commit; Commit complete. SQL> alter system switch logfile; System altered. SQL> alter system checkpoint; System altered. SQL>
3.rman level 0级备份
RMAN> backup incremental level 1 database; Starting backup at 02-DEC-13 using channel ORA_DISK_1 channel ORA_DISK_1: starting incremental level 1 datafile backupset channel ORA_DISK_1: specifying datafile(s) in backupset input datafile fno=00001 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/system01.dbf input datafile fno=00003 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/sysaux01.dbf input datafile fno=00002 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/undotbs01.dbf input datafile fno=00006 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/yn.dbf input datafile fno=00004 name=/u01/app/oracle/product/10.2.0/db_2/oradata/orcl/users01.dbf channel ORA_DISK_1: starting piece 1 at 02-DEC-13 channel ORA_DISK_1: finished piece 1 at 02-DEC-13 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd1_TAG20131202T223244_99s6jfdz_.bkp tag=TAG20131202T223244 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:25 channel ORA_DISK_1: starting incremental level 1 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 1 at 02-DEC-13 channel ORA_DISK_1: finished piece 1 at 02-DEC-13 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_ncsn1_TAG20131202T223244_99s6k6o1_.bkp tag=TAG20131202T223244 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 02-DEC-13 RMAN>
4.查看此时的备份文件、关闭数据库、重启数据库
[root@app 2013_12_02]# ll ?昏. 649132 -rw-r----- 1 oracle oinstall 7176192 12-02 22:29 o1_mf_ncsn0_TAG20131202T222739_99s6bvm4_.bkp -rw-r----- 1 oracle oinstall 7176192 12-02 22:33 o1_mf_ncsn1_TAG20131202T223244_99s6k6o1_.bkp -rw-r----- 1 oracle oinstall 649576448 12-02 22:29 o1_mf_nnnd0_TAG20131202T222739_99s66wc3_.bkp -rw-r----- 1 oracle oinstall 114688 12-02 22:33 o1_mf_nnnd1_TAG20131202T223244_99s6jfdz_.bkp
SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 599785472 bytes Fixed Size 2022632 bytes Variable Size 251659032 bytes Database Buffers 343932928 bytes Redo Buffers 2170880 bytes Database mounted.
5.rman恢复
RMAN> run { 2> allocate channel c1 type disk; 3> restore database; 4> recover database; 5> sql 'alter database open'; 6> } allocated channel: c1 channel c1: sid=156 devtype=DISK Starting restore at 02-DEC-13 channel c1: starting datafile backupset restore channel c1: specifying datafile(s) to restore from backup set restoring datafile 00001 to /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/system01.dbf restoring datafile 00002 to /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/undotbs01.dbf restoring datafile 00003 to /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/sysaux01.dbf restoring datafile 00004 to /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/users01.dbf restoring datafile 00006 to /u01/app/oracle/product/10.2.0/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_TAG20131202T222739_99s66wc3_.bkp channel c1: restored backup piece 1 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd0_TAG20131202T222739_99s66wc3_.bkp tag=TAG20131202T222739 channel c1: restore complete, elapsed time: 00:00:25 Finished restore at 02-DEC-13 Starting recover at 02-DEC-13 channel c1: starting incremental datafile backupset restore channel c1: specifying datafile(s) to restore from backup set destination for restore of datafile 00001: /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/system01.dbf destination for restore of datafile 00002: /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/undotbs01.dbf destination for restore of datafile 00003: /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/sysaux01.dbf destination for restore of datafile 00004: /u01/app/oracle/product/10.2.0/db_2/oradata/orcl/users01.dbf destination for restore of datafile 00006: /u01/app/oracle/product/10.2.0/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_nnnd1_TAG20131202T223244_99s6jfdz_.bkp channel c1: restored backup piece 1 piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_12_02/o1_mf_nnnd1_TAG20131202T223244_99s6jfdz_.bkp tag=TAG20131202T223244 channel c1: restore complete, elapsed time: 00:00:01 starting media recovery media recovery complete, elapsed time: 00:00:02 Finished recover at 02-DEC-13 sql statement: alter database open released channel: c1 RMAN>
6.查询数据
[oracle@app ~]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.1.0 - Production on Mon Dec 2 22:52:49 2013 Copyright (c) 1982, 2005, Oracle. All rights reserved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production With the Partitioning, OLAP and Data Mining options SQL> select * from t1; id name
---------------------
1 first
2 second
3 rman3
4 rman4
这里说一个我在进行此试验时，遇到的一个另外问题：
level 1级备份操作后，进行了drop table t1；我以为利用 level 0+level 1 恢复时，rman只恢复到我level 1备份处，t1表的4条数据还是存在的。
但，当我这样操作后，进行select × from t1 查询时，发现提示该表不存在。
后来仔细想了想，当我利用recover database时，数据库会自动读取redo或者归档文件来进行drop table t1操作的。