Oracle 利用RMAN 完成数据迁移
Oracle 利用RMAN 完成数据迁移
整体流程:对A机的数据库来一个热备,并且是一个全备,然后通过scp命令把备份传到B机,然后把A库停掉(注意关库不会触发归档),之后再把归档日志和redo日志传给B机,最后再在B库上 restore 和recover
数据文件,控制文件,参数文件 的恢复过程:根据数据库的启动流程,可以知道最先读取数据文件,所以应该先还原参数文件,然后会读控制文件,所以你要再修复控制文件,最后再修复数据文件, 具体操作流程: 一:对A库做一个热全备, RMAN> backup as backupset database include current controlfile plus archivelog format '/u01/app/Oracle/arch_%U.rmn' delete all input; 省列。。。。 Finished backup at 14-AUG-14 二:把所做的备份用scp传给B机。 如红色命令会把A机的ENMOEDU接到B机的Oracle/下,,即Oracle/ENMOEDU [oracle@ENMOEDU ENMOEDU]$ scp -r /u01/app/oracle/fast_recovery_area/ENMOEDU oracle@192.168.80.11:/u01/app/oracle/The authenticity of host '192.168.80.11 (192.168.80.11)' can't be established.
RSA key fingerprint is 54:78:71:4c:93:51:01:f4:e3:83:b5:35:8f:9f:d5:b1.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added '192.168.80.11' (RSA) to the list of known hosts.
oracle@192.168.80.11's password:
o1_mf_nnndf_SECTION_DF1_9srh9o7k_.bkp 100% 148MB 36.9MB/s 00:04
o1_mf_ncnnf_SECTION_DF1_9srh9ws3_.bkp 100% 9568KB 9.3MB/s 00:01
o1_mf_nnndf_SECTION_DF1_9srh9n9o_.bkp 100% 97MB 24.2MB/s 00:04
o1_mf_nnsnf_SECTION_DF1_9srh9nml_.bkp 100% 96KB 96.0KB/s 00:00
o1_mf_nnndf_SECTION_DF1_9srh9o26_.bkp 100% 140MB 28.0MB/s 00:05
o1_mf_nnndf_SECTION_DF1_9srh9v71_.bkp 100% 145MB 29.0MB/s 00:05
o1_mf_nnndf_SECTION_DF1_9srhb0dh_.bkp 100% 81MB 27.0MB/s 00:03
o1_mf_ncsnf_TAG20140814T203309_9ysc8x14_.bkp 100% 9600KB 4.7MB/s 00:02
o1_mf_nnndf_TAG20140814T203309_9ysc46go_.bkp 100% 1140MB 24.3MB/s 00:47
control02.ctl 100% 9520KB 9.3MB/s 00:01
三:把A库数据库关闭,把归档和redo传给B机,(因为你备份的时候没有关闭数据库,难免会再产生新的归档和redo,为保证一致性,还有必要进行这步) 1.SYS@ENMOEDU> select * from v$log; #显示第三组 正在被使用,所以只传它就行(因为别的已经被归档,)
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC
---------- ---------- ---------- ---------- ---------- ---------- ---
STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------------- ------------- --------- ------------ ---------
1 1 100 52428800 512 1 YES
INACTIVE 1365811 14-AUG-14 1365876 14-AUG-14
2 1 101 52428800 512 1 YES
INACTIVE 1365876 14-AUG-14 1365981 14-AUG-14
3 1 102 52428800 512 1 NO
CURRENT 1365981 14-AUG-14 2.8147E+14
2.SYS@ENMOEDU> select * from v$logfile; #查看日志的具体位置
GROUP# STATUS TYPE
---------- ------- -------
MEMBER
--------------------------------------------------------------------------------
IS_
---
1 ONLINE
/u01/app/oracle/oradata/ENMOEDU/redo01.log
NO
2 ONLINE
/u01/app/oracle/oradata/ENMOEDU/redo02.log
NO
GROUP# STATUS TYPE
---------- ------- -------
MEMBER
--------------------------------------------------------------------------------
IS_
---
3 ONLINE
/u01/app/oracle/oradata/ENMOEDU/redo03.log
NO [oracle@ENMOEDU ENMOEDU]$ scp /u01/app/oracle/oradata/ENMOEDU/redo03.log oracle@192.168.80.11:/u01/app/oracle
oracle@192.168.80.11's password:
redo03.log 100% 50MB 50.0MB/s 00:01 至于归档嘛 我在测试的时候没有切换日志,也不存在日志组写满的情况,所以没有产生归档,又因为我在备份的时候加上了delete all input 所以会把已经备份的归档删掉,所以你不会看到新的归档 也就不用传了 呵呵 四:在B机操作 1,开启伪实例,注意可不要把B机的数据库实例给打开了 因为我的测试B机也有数据库。 [oracle@ENMOEDU ~]$ set DBID=87396644 #设成A机的数据库编号 RMAN> startup #启动伪实例 [oracle@ENMOEDU ENMOEDU]$ rman target / RMAN> restore spfile from '/u01/app/oracle/ENMOEDU/backupset/2014_08_14/o1_mf_ncsnf_TAG20140814T203309_9ysc8x14_.bkp'; Starting restore at 15-AUG-14 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=20 device type=DISK channel ORA_DISK_1: restoring spfile from AUTOBACKUP /u01/app/oracle/ENMOEDU/backupset/2014_08_14/o1_mf_ncsnf_TAG20140814T203309_9ysc8x14_.bkp channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete Finished restore at 15-AUG-14 [oracle@ENMOEDU dbs]$ ls #恢复的参数文件在$ORACLE_HOME/dbs 下
hc_ENMOEDU2.dat lkDUMMY orapwENMOEDU spfileENMOEDU2.ora RMAN> shutdown immediate #关伪实例 Oracle instance shut down 2.然后再起真正的实例,恢复控制文件(要注意,他原来就有,你这样起,把B机的所有文件包括 数据文件 ,控制文件,参数文件,日志文件都删掉) SQL> startup ORACLE instance started. Total System Global Area 422670336 bytes Fixed Size 1345380 bytes Variable Size 260049052 bytes Database Buffers 155189248 bytes Redo Buffers 6086656 bytes ORA-00205: error in identifying control file, check alert log for more info RMAN> restore controlfile from '/u01/app/oracle/ENMOEDU/backupset/2014_08_14/o1_mf_ncsnf_TAG20140814T203309_9ysc8x14_.bkp'; Starting restore at 15-AUG-14 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=18 device type=DISK channel ORA_DISK_1: restoring control file channel ORA_DISK_1: restore complete, elapsed time: 00:00:01 output file name=/u01/app/oracle/oradata/ENMOEDU/control01.ctl output file name=/u01/app/oracle/fast_recovery_area/ENMOEDU/control02.ctl Finished restore at 15-AUG-14 3.把数据库开到mount状态,以便修复数据文件。 RMAN> alter database mount; database mounted released channel: ORA_DISK_1 RMAN> restore database; #恢复数据文件 发现报错,很可能是备份已经过期已经, Starting restore at 15-AUG-14 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=1 device type=DISK creating datafile file number=1 name=/u01/app/oracle/oradata/ENMOEDU/system01.dbf RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of restore command at 08/15/2014 23:21:00 ORA-01180: can not create datafile 1 ORA-01110: data file 1: '/u01/app/oracle/oradata/ENMOEDU/system01.dbf' RMAN> list backup; #查看备份信息 发现确实过期 10 13.85M DISK 00:00:02 14-AUG-14 BP Key: 14 Status: EXPIRED Compressed: NO Tag: TAG20140814T203306 Piece Name: /u01/app/oracle/arch_50pfv1g2_1_1.rmn 然后再去A机 再来一个整体备份 再传给B机 不在赘述,再恢复控制文件,然后再恢复数据文件, 再启动到open即可。
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