rman异机恢复-白红宇

rman异机恢复

阅读量：5827 次

发布时间：2019-06-18

本文共 12778 字，大约阅读时间需要 42 分钟。

几点说明：

（1）RMAN异机恢复的时候，db_name必须相同。如果说要想改成其他的实例名，可以在恢复成功后，用nid命令修改。实例名的信息会记录到控制文件里，所以如果在恢复的时候，如果实例名不一致，恢复的时候会报错。

（2）如果恢复的路径和源库不一致，就需要在restore时用set命令指定新位置。并且使用switchdatafileall将信息更新的到控制文件。

在做duplicate的时候，RMAN会自动根据pfile中的log_file_name_convert和db_file_name_convert来进行set的转换。手工restore时，只能只只能使用set命令。

（3）异机恢复对相同目录和不同目录都做了说明。

（4）最后测试了NID修改DBID和DBNAME.

一.Target库准备工作：

1.查询DBID

SQL>selectname,dbidfromv$database;

NAMEDBID

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

DAVE808234286

2.备份DB

关于RMAN的shell备份脚本，参考：

Nocatalog下的RMAN增量备份shell脚本

在这里我用0级和1级备份了下DB。

[oracle@qs-dmm-rh1backup]$ls

arch_0pm6qt8q_1_1_20110309dave_lev0_0jm6qt77_1_1_20110309dave_lev1_0um6qtcq_1_1_20110309

arch_0qm6qt8q_1_1_20110309dave_lev0_0km6qt77_1_1_20110309dave_lev1_0vm6qtcq_1_1_20110309

arch_13m6qtda_1_1_20110309dave_lev0_0lm6qt77_1_1_20110309dave_lev1_11m6qtd7_1_1_20110309

arch_14m6qtda_1_1_20110309dave_lev0_0nm6qt7c_1_1_20110309dave_spfile_16m6qtde_1_1_20110309

ctl_file_15m6qtdc_1_1_20110309dave_lev1_0tm6qtcq_1_1_20110309

二.Auxiliary库准备工作：

1.创建口令文件

[oracle@qs-dmm-rh2trace]$orapwdfile=?/dbs/orapwdavepassword=oracle

2.创建相关的目录

[oracle@qs-dmm-rh2u01]$mkdiroradata

[oracle@qs-dmm-rh2oradata]$pwd

/u01/oradata

3.创建初始化参数

将Target库的pfile文件copy过来。

也可以使用RMAN从我们Target库的备份集中恢复，因为我们之前备份过spfile。不过使用RMAN，DB要先启动到nomout状态。这个可以用默认的init.ora来启动。

[oracle@qs-dmm-rh2backup]$exportORACLE_SID=dave

[oracle@qs-dmm-rh2backup]$rmantarget/

RecoveryManager:Release11.2.0.1.0-ProductiononFriMar1115:11:312011

connectedtotargetdatabase:DAVE(notmounted)

RMAN>restorespfiletopfile'/u01/app/oracle/product/11.2.0/dbhome_1/dbs/initdave2.ora'from'/u01/backup/dave_spfile_16m6qtde_1_1_20110309';

Startingrestoreat11-MAR-11

usingtargetdatabasecontrolfileinsteadofrecoverycatalog

allocatedchannel:ORA_DISK_1

channelORA_DISK_1:SID=19devicetype=DISK

channelORA_DISK_1:restoringspfilefromAUTOBACKUP/u01/backup/dave_spfile_16m6qtde_1_1_20110309

channelORA_DISK_1:SPFILErestorefromAUTOBACKUPcomplete

Finishedrestoreat11-MAR-11

如果修改数据文件保存的位置，那么要修改控制文件的相关的参数：

*.control_files='/u01/oradata/control01.ctl','/u01/oradata/control02.ctl','/u01/oradata/control03.ctl'

*.db_name='dave'

4.将用pfile将Auxiliary库启动到nomout状态

SQL>startupnomountpfile=?/dbs/initdave.ora

5.恢复控制文件

[oracle@qs-dmm-rh2dbs]$exportORACLE_SID=dave

[oracle@qs-dmm-rh2dbs]$rmantarget/

RecoveryManager:Release11.2.0.1.0-ProductiononFriMar1115:25:552011

connectedtotargetdatabase:DAVE(notmounted)

RMAN>restorecontrolfilefrom'/u01/backup/ctl_file_15m6qtdc_1_1_20110309';

Startingrestoreat11-MAR-11

usingtargetdatabasecontrolfileinsteadofrecoverycatalog

allocatedchannel:ORA_DISK_1

channelORA_DISK_1:SID=20devicetype=DISK

channelORA_DISK_1:restoringcontrolfile

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

outputfilename=/u01/oradata/control01.ctl

outputfilename=/u01/oradata/control02.ctl

outputfilename=/u01/oradata/control03.ctl

Finishedrestoreat11-MAR-11

restore的时候需要控制文件，控制文件恢复的位置，是我们在pfile中的control_files参数控制的。

6.将DB启动到mout状态

RMAN>alterdatabasemount;

databasemounted

releasedchannel:ORA_DISK_1

7.restore数据库

7.1恢复目录不同的情况：

因为我们的路径不同，所以我们需要使用set命令转换一下路径。

到Target库查询一下：

SQL>selectfile_id,file_namefromdba_data_files;

FILE_IDFILE_NAME

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

4/u01/app/oracle/oradata/dave/users01.dbf

3/u01/app/oracle/oradata/dave/undotbs01.dbf

2/u01/app/oracle/oradata/dave/sysaux01.dbf

1/u01/app/oracle/oradata/dave/system01.dbf

SQL>selectfile_id,file_namefromdba_temp_files;

FILE_IDFILE_NAME

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

1/u01/app/oracle/oradata/dave/temp01.dbf

注意，restore的时候不会对temp表空间进行restore。所以等restore之后，我们需要手工创建temp表空间。

RMAN>run

2>{

setnewnamefordatafile1to"/u01/oradata/system01.dbf";

3>4>setnewnamefordatafile2to"/u01/oradata/sysaux01.dbf";

5>setnewnamefordatafile3to"/u01/oradata/undotbs01.dbf";

6>setnewnamefordatafile4to"/u01/oradata/users01.dbf";

7>restoredatabase;

8>switchdatafileall;

9>}

对switchdatafileall的说明：

--对于nocatalog模式下，rman备份的信息是保存在控制文件里的，包括文件的路径信息。这里的switchdatafileall的作用，就是更新控制文件里的信息。

executingcommand:SETNEWNAME

releasedchannel:ORA_DISK_1

executingcommand:SETNEWNAME

Startingrestoreat11-MAR-11

allocatedchannel:ORA_DISK_1

channelORA_DISK_1:SID=20devicetype=DISK

channelORA_DISK_1:startingdatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

channelORA_DISK_1:restoringdatafile00003to/u01/oradata/undotbs01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev0_0lm6qt77_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev0_0lm6qt77_1_1_20110309tag=DAVE_LEV0

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:03

channelORA_DISK_1:startingdatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

channelORA_DISK_1:restoringdatafile00004to/u01/oradata/users01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev0_0nm6qt7c_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev0_0nm6qt7c_1_1_20110309tag=DAVE_LEV0

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

channelORA_DISK_1:startingdatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

channelORA_DISK_1:restoringdatafile00002to/u01/oradata/sysaux01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev0_0km6qt77_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev0_0km6qt77_1_1_20110309tag=DAVE_LEV0

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:15

channelORA_DISK_1:startingdatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

channelORA_DISK_1:restoringdatafile00001to/u01/oradata/system01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev0_0jm6qt77_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev0_0jm6qt77_1_1_20110309tag=DAVE_LEV0

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:25

Finishedrestoreat11-MAR-11

datafile1switchedtodatafilecopy

inputdatafilecopyRECID=5STAMP=745522150filename=/u01/oradata/system01.dbf

datafile2switchedtodatafilecopy

inputdatafilecopyRECID=6STAMP=745522150filename=/u01/oradata/sysaux01.dbf

datafile3switchedtodatafilecopy

inputdatafilecopyRECID=7STAMP=745522150filename=/u01/oradata/undotbs01.dbf

datafile4switchedtodatafilecopy

inputdatafilecopyRECID=8STAMP=745522150filename=/u01/oradata/users01.dbf

7.2恢复目录相同

这种情况比较简单，直接：

RMAN>restoredatabase;

8.recoverDB

RMAN>recoverdatabase;

Startingrecoverat11-MAR-11

usingchannelORA_DISK_1

channelORA_DISK_1:startingincrementaldatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

destinationforrestoreofdatafile00001:/u01/oradata/system01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev1_0tm6qtcq_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev1_0tm6qtcq_1_1_20110309tag=DAVE_LEV1

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

channelORA_DISK_1:startingincrementaldatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

destinationforrestoreofdatafile00002:/u01/oradata/sysaux01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev1_0um6qtcq_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev1_0um6qtcq_1_1_20110309tag=DAVE_LEV1

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:02

channelORA_DISK_1:startingincrementaldatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

destinationforrestoreofdatafile00003:/u01/oradata/undotbs01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev1_0vm6qtcq_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev1_0vm6qtcq_1_1_20110309tag=DAVE_LEV1

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

channelORA_DISK_1:startingincrementaldatafilebackupsetrestore

channelORA_DISK_1:specifyingdatafile(s)torestorefrombackupset

destinationforrestoreofdatafile00004:/u01/oradata/users01.dbf

channelORA_DISK_1:readingfrombackuppiece/u01/backup/dave_lev1_11m6qtd7_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/dave_lev1_11m6qtd7_1_1_20110309tag=DAVE_LEV1

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

startingmediarecovery

channelORA_DISK_1:startingarchivedlogrestoretodefaultdestination

channelORA_DISK_1:restoringarchivedlog

archivedlogthread=1sequence=7

channelORA_DISK_1:readingfrombackuppiece/u01/backup/arch_13m6qtda_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/arch_13m6qtda_1_1_20110309tag=ARC_BAK

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

archivedlogfilename=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/arch1_7_745352047.dbfthread=1sequence=7

channelORA_DISK_1:startingarchivedlogrestoretodefaultdestination

channelORA_DISK_1:restoringarchivedlog

archivedlogthread=1sequence=8

channelORA_DISK_1:readingfrombackuppiece/u01/backup/arch_14m6qtda_1_1_20110309

channelORA_DISK_1:piecehandle=/u01/backup/arch_14m6qtda_1_1_20110309tag=ARC_BAK

channelORA_DISK_1:restoredbackuppiece1

channelORA_DISK_1:restorecomplete,elapsedtime:00:00:01

archivedlogfilename=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/arch1_8_745352047.dbfthread=1sequence=8

unabletofindarchivedlog

archivedlogthread=1sequence=9

RMAN-00571:===========================================================

RMAN-00569:===============ERRORMESSAGESTACKFOLLOWS===============

RMAN-00571:===========================================================

RMAN-03002:failureofrecovercommandat03/11/201117:32:00

RMAN-06054:mediarecoveryrequestingunknownarchivedlogforthread1withsequence9andstartingSCNof823627

RMAN>

之后会报一个错误：

RMAN-06054:mediarecoveryrequestingunknownarchivedlogforthread1withsequence9andstartingSCNof823627

这里是提醒恢复到一个未知的scn号。在alterdatabasemount之后，通过setuntilscn或者setuntiltime命令设置恢复到的scn号或时间。就可以避免这个错误。

9.用openresetlogs打开数据库

SQL>alterdatabaseopenresetlogs;

Databasealtered.

我测试的平台是11gR2的版本，在openresetlogs之后，自动在原来默认的路径创建了temp表空间和3组redo文件。

如果恢复目录和原来相同，就不用修改。

如果目录不同，我们就需要把这些文件移到我们现在的data目录。

源目录：

[oracle@qs-dmm-rh2dave]$pwd

/u01/app/oracle/oradata/dave

[oracle@qs-dmm-rh2dave]$ls

redo01.logredo02.logredo03.logtemp01.dbf

现在的目录：

[oracle@qs-dmm-rh2dave]$cd/u01/oradata/

[oracle@qs-dmm-rh2oradata]$ls

control01.ctlcontrol02.ctlcontrol03.ctlsysaux01.dbfsystem01.dbfundotbs01.dbfusers01.dbf

（1）处理onlineredolog

SQL>selectgroup#,bytes/1024/1024||'M',statusfromv$log;

GROUP#BYTES/1024/1024||'M'STATUS

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

150MINACTIVE

250MCURRENT

350MUNUSED

SQL>selectgroup#,memberfromv$logfile;

GROUP#MEMBER

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

3/u01/app/oracle/oradata/dave/redo03.log

2/u01/app/oracle/oradata/dave/redo02.log

1/u01/app/oracle/oradata/dave/redo01.log

oracle至少有2组redolog。所以我们可以将已经完成归档的redodrop掉，重新创建。

SQL>alterdatabasedroplogfilegroup3;

Databasealtered.

SQL>alterdatabaseaddlogfilegroup3('/u01/oradata/redo03.log')size50m;

Databasealtered.

SQL>altersystemswitchlogfile;

Systemaltered.

SQL>selectgroup#,bytes/1024/1024||'M',statusfromv$log;

GROUP#BYTES/1024/1024||'M'STATUS

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

150MINACTIVE

250MACTIVE

350MCURRENT

SQL>alterdatabasedroplogfilegroup1;

Databasealtered.

SQL>alterdatabaseaddlogfilegroup1('/u01/oradata/redo01.log')size50m;

Databasealtered.

SQL>altersystemswitchlogfile;

Systemaltered.

SQL>alterdatabasedroplogfilegroup2;

Databasealtered.

SQL>alterdatabaseaddlogfilegroup2('/u01/oradata/redo02.log')size50m;

Databasealtered.

SQL>selectgroup#,memberfromv$logfile;

GROUP#MEMBER

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

3/u01/oradata/redo03.log

2/u01/oradata/redo02.log

1/u01/oradata/redo01.log

（2）处理temp临时表空间

SQL>selectnamefromv$tempfile;

NAME

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

/u01/app/oracle/oradata/dave/temp01.dbf

--表空间offline

SQL>alterdatabasetempfile'/u01/app/oracle/oradata/dave/temp01.dbf'offline;

Databasealtered.

--在OS级别移动temp的数据文件

SQL>!mv/u01/app/oracle/oradata/dave/temp01.dbf/u01/oradata/temp01.dbf

--修改控制文件中temp文件的信息

SQL>alterdatabaserenamefile'/u01/app/oracle/oradata/dave/temp01.dbf'to'/u01/oradata/temp01.dbf';

Databasealtered.

--temp表空间online

SQL>alterdatabasetempfile'/u01/oradata/temp01.dbf'online;

Databasealtered.

--验证

SQL>selectnamefromv$tempfile;

NAME

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

/u01/oradata/temp01.dbf

转载于:https://blog.51cto.com/ecloud/1300571

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