Oracle技术之RMAN 异机复制数据库

RMAN 异机复制和同机复制操作步骤是一样的，不同的是我们需要把备份的文件copy到辅助库上实验平台： RedHat linux 4.7 + Oracle 10g目标库信息：ORACLE_BASE: /u01/app/oracleORACLE_HOME: /u01/app/oracle/product/10.2.0/db_1ORACLE_SID：orclIP: 192.168.1.20辅助库信息：ORACLE_BASE: /u01/app/oracleORACLE_HOME: /u01/app/oracle/product/10.2.0/db_1ORACLE_SID：orclIP: 192.168.1.21我们以实例名相同的为例，实例名不同也一样，在pfile里修改对应参数就可以了。步骤如下：（1）构建辅助数据库目录结构（2）创建pfile，并复制到辅助数据库，修改相关内容（3）创建辅助实例口令文件（4）RMAN 备份源库（5）添加配置监听（6）将源库备份文件拷贝到辅助库相同位置（7）用pfile文件，将辅助数据库启动到nomount 状态（8）执行RMAN duplicate命令复制数据库（9）创建spfile文件（10）在磁带上恢复备份（11）使用DBNEWID程序生成新的DBID一、构建辅助数据库目录结构1、Oracle data 目录[oracle@localhost oracle]$ mkdir oradata[oracle@localhost oracle]$ lsoradata oraInventory product[oracle@localhost oracle]$ cd oradata/[oracle@localhost oracle]$ mkdir orcl2、其他目录[oracle@localhost oracle]$ pwd/u01/app/oracle[oracle@localhost oracle]$ mkdir admin[oracle@localhost oracle]$ lsadmin oradata oraInventory product[oracle@localhost oracle]$ cd admin[oracle@localhost admin]$ ls[oracle@localhost admin]$ mkdir orcl[oracle@localhost admin]$ lsorcl[oracle@localhost admin]$ cd orcl[oracle@localhost orcl]$ mkdir adump[oracle@localhost orcl]$ mkdir bdump[oracle@localhost orcl]$ mkdir cdump[oracle@localhost orcl]$ mkdir dpdump[oracle@localhost orcl]$ mkdir pfile[oracle@localhost orcl]$ mkdir udump[oracle@localhost orcl]$ lsadump bdump cdump dpdump pfile udump二、创建pfile，复制到辅助数据库，并修改相关参数1、在源库上创建pfile 文件SQL> conn sys/admin@orcl as sysdba;Connected.SQL> create pfile from spfile;File created.2、用scp 命令将pfile 文件传到辅助库。要放在$ORACLE_HOME/dbs目录下，不然ORACLE 不识别。[oracle@db1 orcl]$ cd /u01/app/oracle/product/10.2.0/db_1/dbs[oracle@db1 dbs]$ lshc_DAVE.dat initdw.ora lkDAVE orapworcl spfileorcl.orahc_orcl.dat init.ora lkORCL snapcf_orcl.finitDAVE.ora initorcl.ora orapwDAVE spfileDAVE.ora[oracle@db1 dbs]$ scp initorcl.ora 192.168.1.21:/$ORACLE_HOME/dbsThe authenticity of host "192.168.1.21 （192.168.1.21）" can"t be established.RSA key fingerprint is 1a:20:7a:05:bd:e0:ac:04:21:02:b1:72:01:69:40:d6.Are you sure you want to continue connecting （yes/no） yesWarning: Permanently added "192.168.1.21" （RSA） to the list of known hosts.oracle@192.168.1.21"s password:initorcl.ora 100% 1108 1.1KB/s 00:003、在辅助库上确认文件是否传送过来[oracle@localhost orcl]$ cd $ORACLE_HOME/dbs[oracle@localhost dbs]$ lsinitdw.ora init.ora initorcl.ora4、在辅助库上修改pfile参数[oracle@localhost dbs]$ more initorcl.oraorcl.__db_cache_size=167772160orcl.__java_pool_size=4194304orcl.__large_pool_size=4194304orcl.__shared_pool_size=62914560orcl.__streams_pool_size=0*.audit_file_dest="/u01/app/oracle/admin/orcl/adump"*.background_dump_dest="/u01/app/oracle/admin/orcl/bdump"*.compatible="10.2.0.1.0"*.control_file_record_keep_time=14*.control_files="/u01/app/oracle/oradata/orcl/control01.ctl","/u01/app/oracle/oradata/orcl/control02.ctl","/u01/app/oracle/oradata/orcl/control03.ctl"*.core_dump_dest="/u01/app/oracle/admin/orcl/cdump"*.db_block_size=8192*.db_domain=""*.db_file_multiblock_read_count=16*.db_name="orcl"*.db_recovery_file_dest="/u01/app/oracle/flash_recovery_area"*.db_recovery_file_dest_size=2147483648*.dispatchers="（PROTOCOL=TCP）（SERVICE=orclXDB）"*.job_queue_processes=10*.log_archive_dest_1="location=/u01/archivelog"*.open_cursors=300*.pga_aggregate_target=81788928*.processes=150*.remote_login_passwordfile="EXCLUSIVE"*.sga_target=246415360*.undo_management="AUTO"*.undo_tablespace="UNDOTBS1"*.user_dump_dest="/u01/app/oracle/admin/orcl/udump"说明，在这里我没有做修改，因为我异机复制实例名相同，存储位置也相同。如果说你复制的不同的话，就需要修改相关的实例名。如果存储位置不同的话，还需要添加以下参数，对数据文件位置进行转换。db_file_name_convert = （"/u01/app/oracle/oradata/orcl","/u01/app/oracle/oradata/DAVE"）三、创建辅助实例ORCL 的口令文件[oracle@localhost dbs]$ cd $ORACLE_HOME/bin[oracle@localhost bin]$ orapwd file=$ORACLE_HOME/dbs/orapworcl password=admin[oracle@localhost bin]$ cd $ORACLE_HOME/dbs[oracle@localhost dbs]$ lsinitdw.ora init.ora initorcl.ora orapworclwindows下oracle默认的位置是$ORACLE_HOME/database目录，文件名格式是pwdSID.ora。linux下oracle默认的位置是$ORACLE_HOME/dbs目录，文件名格式是orapwSID。创建完后，数据库需要重启动，新的口令文件才能生效。四、RMAN 备份源库（orcl）[oracle@db1 backup]$ rman target sys/admin@orclRecovery Manager: Release 10.2.0.1.0 - Production on Sun Jul 18 18:26:16 2010Copyright （c） 1982, 2005, Oracle. All rights reserved.connected to target database: ORCL （DBID=1248423599）RMAN>RUN {allocate channel c1 type disk;allocate channel c2 type disk;BACKUP FORMAT "/u02/backup/orcl_%U_%T" skip inaccessible filesperset 5 DATABASE TAG orcl_hot_db_bk;sql "alter system archive log current";BACKUP FORMAT "/u02/backup/arch_%U_%T" skip inaccessible filesperset 5 ARCHIVELOG ALL DELETE INPUT;backup current controlfile tag="bak_ctlfile" format="/u02/backup/ctl_file_%U_%T";backup spfile tag="spfile" format="/u02/backup/ORCL_spfile_%U_%T";release channel c2;release channel c1;}五、添加，配置监听1、在辅助库的Listener.ora 文件中，添加如下内容（看机器监听情况，也可能主库也要配置）能达到两边互相连通就OK如：sqlplus sys/oracle@targetorcl as sysdba 另外tnsping xxxx命令测试。SID_LIST_LISTENER =（SID_LIST =（SID_DESC =（SID_NAME = PLSExtProc）（ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1）（PROGRAM = extproc））（SID_DESC =（GLOBAL_DBNAME = orcl）（ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1）（SID_NAME = orcl）））2、修改辅助库的tnsnames.ora 文件，添加如下内容TARGETORCL =（DESCRIPTION =（ADDRESS_LIST =（ADDRESS = （PROTOCOL = TCP）（HOST = 192.168.1.20）（PORT = 1521）））（CONNECT_DATA =（SERVICE_NAME = orcl）））ORCL =（DESCRIPTION =（ADDRESS_LIST =（ADDRESS = （PROTOCOL = TCP）（HOST = localhost）（PORT = 1521）））（CONNECT_DATA =（SERVICE_NAME = orcl）））3、修改源库的tnsnames.ora 文件，添加如下内容：AUXORCL =（DESCRIPTION =（ADDRESS_LIST =（ADDRESS = （PROTOCOL = TCP）（HOST = 192.168.1.21）（PORT = 1521）））（CONNECT_DATA =（SERVER = DEDICATED）（SERVICE_NAME = orcl）））六、将源库的备份拷贝到辅助数据库的相同位置这里有两种方法，一种直接在辅助库上建相同的目录结构，在用SCP 命令把这些备份文件copy过去，但是这样会占用大量的网络资源。还有一种就是建好目录结构后用NFS直接Mount上去。在这里我们用后面一种方法试一下。1、在辅助库上建相同的备份目录结构因为我们在源库上备份是备份到/u02/backup目录中的，所以我们在辅助库上也建这个目录[root@localhost /]# mkdir -p /u02/backup[root@localhost /]# chown oracle /u02[root@localhost /]# chmod 777 /u022、将源库的备份挂载到辅助库上（1）在源库上将/u02/backup 目录添加到共享[root@db1 ~]# more /etc/exports/u02/backup 192.168.1.21（rw,async,anonuid=65534,anongid=65534）[root@db1 ~]# service nfs start（2）在辅助库上挂载源库的目录，注意，mount命令必须以root用户执行[root@localhost /]# mount -t nfs -o rw,bg,hard,nointr,rsize=32768,wsize=32768,tcp,vers=3,timeo=600,actimeo=010.85.10.1:/u02/backup /u02/backup-- 注意：在挂载NFS的时候，一定要加上-t -o 参数，不然在RMAN 复制的时候会报错：--ORA-27054: NFS file system where the file is created or resides is not mounted with correct options[root@localhost /]# cd /u02/backup/[root@localhost backup]# lsarch_3klj4676_1_1_20100718 orcl_3hlj45vf_1_1_20100718arch_3llj4676_1_1_20100718 orcl_3ilj465c_1_1_20100718ctl_file_3mlj467h_1_1_20100718 orcl_3jlj4661_1_1_20100718orcl_3glj45vf_1_1_20100718 ORCL_spfile_3nlj467k_1_1_201007183、启动辅助库至nomount 状态，注意使用pfile参数启动[oracle@localhost dbs]$ sqlplus /nologSQL*Plus: Release 10.2.0.1.0 - Production on Tue Jul 20 03:53:53 2010Copyright （c） 1982, 2005, Oracle. All rights reserved.SQL> conn / as sysdbaConnected to an idle instance.SQL> startup nomount pfile=/dbs/initorcl.oraORACLE instance started.Total System Global Area 247463936 bytesFixed Size 1218772 bytesVariable Size 79693612 bytesDatabase Buffers 163577856 bytesRedo Buffers 2973696 bytesSQL> exit -- 启动后就退出session，因为在duplicata的时候不能有session连接Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - ProductionWith the Partitioning, OLAP and Data Mining options八、RMAN 连??到目标实例和辅助实例，运行duplicate 命令复制数据库[oracle@db1 ~]$ rman target sys/admin@orcl auxiliary sys/admin@auxorcl;（这条命令是在主库执行的）Recovery Manager: Release 10.2.0.1.0 - Production on Sun Jul 18 20:41:19 2010Copyright （c） 1982, 2005, Oracle. All rights reserved.connected to target database: ORCL （DBID=1248423599）connected to auxiliary database: ORCL （not mounted）RMAN> duplicate target database to ORCL nofilenamecheck2> logfile3> "/u01/app/oracle/oradata/orcl/redo01.dbf" size 50m,4> "/u01/app/oracle/oradata/orcl/redo02.dbf" size 50m,5> "/u01/app/oracle/oradata/orcl/redo03.dbf" size 50m;注：这个地方有2个地方需要说明：（1） Nofilenamecheck 参数：如果在复制时，位置不同时，我们会用参数db_file_name_convert 对文件位置进行转换。但是在这个复制示例中我们用的是相同的位置。所以这里必须加上nofilenamecheck参数。该参数通知复制操作不必在执行还原操作前确认文件名是不同的。如果没有指定nofilenamecheck参数，rman会给出如下错误：RMAN-05001: auxiliary filename /u01/app/oracle/oradata/orcl/example01.dbf conflicts with a file used by the target databaseRMAN-05001: auxiliary filename /u01/app/oracle/oradata/orcl/users01.dbf conflicts with a file used by the target database（2） logfile 参数：在完成复制进程并执行最有一条open resetlogs命令时，RMAN 必须为辅助数据库构建全新的日志文件。如上面命令所示，我们可以在duplicate 命令中指定logfile参数，并指定使用的日志文件的大小，数目和位置。还可以在pfile里指定log_file_name_convert 参数来进行转换。这种方法相对而言要简单一点。但因为我们在RMAN 同机复制数据库的例子中用的就是这种方法，所以就换种方法来测试。Starting Duplicate Db at 18-JUL-10using target database control file instead of recovery catalogallocated channel: ORA_AUX_DISK_1channel ORA_AUX_DISK_1: sid=155 devtype=DISKcontents of Memory Script:{set until scn 733545;set newname for datafile 1 to "/u01/app/oracle/oradata/orcl/system01.dbf";set newname for datafile 2 to "/u01/app/oracle/oradata/orcl/undotbs01.dbf";set newname for datafile 3 to "/u01/app/oracle/oradata/orcl/sysaux01.dbf";set newname for datafile 4 to "/u01/app/oracle/oradata/orcl/users01.dbf";set newname for datafile 5 to "/u01/app/oracle/oradata/orcl/example01.dbf";restorecheck readonlyclone database ;}executing Memory Scriptexecuting command: SET until clauseexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEStarting restore at 18-JUL-10using channel ORA_AUX_DISK_1channel ORA_AUX_DISK_1: starting datafile backupset restore -- 开始restore 数据文件channel ORA_AUX_DISK_1: specifying datafile（s） to restore from backup setrestoring datafile 00002 to /u01/app/oracle/oradata/orcl/undotbs01.dbfrestoring datafile 00003 to /u01/app/oracle/oradata/orcl/sysaux01.dbfrestoring datafile 00005 to /u01/app/oracle/oradata/orcl/example01.dbfchannel ORA_AUX_DISK_1: reading from backup piece /u02/backup/orcl_3plj4ejl_1_1_20100718channel ORA_AUX_DISK_1: restored backup piece 1piece handle=/u02/backup/orcl_3plj4ejl_1_1_20100718 tag=ORCL_HOT_DB_BKchannel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:48channel ORA_AUX_DISK_1: starting datafile backupset restorechannel ORA_AUX_DISK_1: specifying datafile（s） to restore from backup setrestoring datafile 00001 to /u01/app/oracle/oradata/orcl/system01.dbfrestoring datafile 00004 to /u01/app/oracle/oradata/orcl/users01.dbfchannel ORA_AUX_DISK_1: reading from backup piece /u02/backup/orcl_3olj4ejk_1_1_20100718channel ORA_AUX_DISK_1: restored backup piece 1piece handle=/u02/backup/orcl_3olj4ejk_1_1_20100718 tag=ORCL_HOT_DB_BKchannel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:14Finished restore at 18-JUL-10sql statement: CREATE CONTROLFILE REUSE SET DATABASE "ORCL" RESETLOGS ARCHIVELOG-- 创建源库的控制文件，然后根据这个文件进行相关的恢复MAXLOGFILES 16MAXLOGMEMBERS 3MAXDATAFILES 100MAXINSTANCES 8MAXLOGHISTORY 292LOGFILEGROUP 1 "/u01/app/oracle/oradata/orcl/redo01.dbf" SIZE 50 M ,GROUP 2 "/u01/app/oracle/oradata/orcl/redo02.dbf" SIZE 50 M ,GROUP 3 "/u01/app/oracle/oradata/orcl/redo03.dbf" SIZE 50 MDATAFILE"/u01/app/oracle/oradata/orcl/system01.dbf"CHARACTER SET WE8ISO8859P1contents of Memory Script:{switch clone datafile all;}executing Memory Scriptreleased channel: ORA_AUX_DISK_1datafile 2 switched to datafile copyinput datafile copy recid=1 stamp=724831148 filename=/u01/app/oracle/oradata/orcl/undotbs01.dbfdatafile 3 switched to datafile copyinput datafile copy recid=2 stamp=724831148 filename=/u01/app/oracle/oradata/orcl/sysaux01.dbfdatafile 4 switched to datafile copyinput datafile copy recid=3 stamp=724831148 filename=/u01/app/oracle/oradata/orcl/users01.dbfdatafile 5 switched to datafile copyinput datafile copy recid=4 stamp=724831148 filename=/u01/app/oracle/oradata/orcl/example01.dbfcontents of Memory Script:{set until scn 733545;recoverclone databasedelete archivelog ;}executing Memory Scriptexecuting command: SET until clauseStarting recover at 18-JUL-10allocated channel: ORA_AUX_DISK_1channel ORA_AUX_DISK_1: sid=155 devtype=DISKstarting media recoverychannel ORA_AUX_DISK_1: starting archive log restore to default destinationchannel ORA_AUX_DISK_1: restoring archive logarchive log thread=1 sequence=46channel ORA_AUX_DISK_1: reading from backup piece /u02/backup/arch_3tlj4er7_1_1_20100718channel ORA_AUX_DISK_1: restored backup piece 1piece handle=/u02/backup/arch_3tlj4er7_1_1_20100718 tag=TAG20100718T205809channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01channel ORA_AUX_DISK_1: starting archive log restore to default destinationchannel ORA_AUX_DISK_1: restoring archive logarchive log thread=1 sequence=45channel ORA_AUX_DISK_1: reading from backup piece /u02/backup/arch_3slj4er7_1_1_20100718channel ORA_AUX_DISK_1: restored backup piece 1piece handle=/u02/backup/arch_3slj4er7_1_1_20100718 tag=TAG20100718T205809channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:02archive log filename=/u01/archivelog/1_45_720642866.dbf thread=1 sequence=45channel clone_default: deleting archive log（s）archive log filename=/u01/archivelog/1_45_720642866.dbf recid=2 stamp=724831155archive log filename=/u01/archivelog/1_46_720642866.dbf thread=1 sequence=46channel clone_default: deleting archive log（s）archive log filename=/u01/archivelog/1_46_720642866.dbf recid=1 stamp=724831153media recovery complete, elapsed time: 00:00:02Finished recover at 18-JUL-10contents of Memory Script:{shutdown clone;startup clone nomount ;-- 如果此时，辅助实例上有session连在上面，将一直等到session退出才能执行，如果等了很长时间还没有执行，不妨检查一下，有没有session连在数据库上。}executing Memory Scriptdatabase dismountedOracle instance shut downconnected to auxiliary database （not started）Oracle instance startedTotal System Global Area 247463936 bytesFixed Size 1218772 bytesVariable Size 79693612 bytesDatabase Buffers 163577856 bytesRedo Buffers 2973696 bytessql statement: CREATE CONTROLFILE REUSE SET DATABASE "ORCL" RESETLOGS ARCHIVELOG-- 创建新的控制文件MAXLOGFILES 16MAXLOGMEMBERS 3MAXDATAFILES 100MAXINSTANCES 8MAXLOGHISTORY 292LOGFILEGROUP 1 "/u01/app/oracle/oradata/orcl/redo01.dbf" SIZE 50 M ,GROUP 2 "/u01/app/oracle/oradata/orcl/redo02.dbf" SIZE 50 M ,GROUP 3 "/u01/app/oracle/oradata/orcl/redo03.dbf" SIZE 50 MDATAFILE"/u01/app/oracle/oradata/orcl/system01.dbf"CHARACTER SET WE8ISO8859P1contents of Memory Script:{set newname for tempfile 1 to"/u01/app/oracle/oradata/orcl/temp01.dbf";switch clone tempfile all;catalog clone datafilecopy "/u01/app/oracle/oradata/orcl/undotbs01.dbf";catalog clone datafilecopy "/u01/app/oracle/oradata/orcl/sysaux01.dbf";catalog clone datafilecopy "/u01/app/oracle/oradata/orcl/users01.dbf";catalog clone datafilecopy "/u01/app/oracle/oradata/orcl/example01.dbf";switch clone datafile all;}executing Memory Scriptexecuting command: SET NEWNAMErenamed temporary file 1 to /u01/app/oracle/oradata/orcl/temp01.dbf in control filecataloged datafile copy datafile copy filename=/u01/app/oracle/oradata/orcl/undotbs01.dbf recid=1 stamp=724831185cataloged datafile copy datafile copy filename=/u01/app/oracle/oradata/orcl/sysaux01.dbf recid=2 stamp=724831186cataloged datafile copy datafile copy filename=/u01/app/oracle/oradata/orcl/users01.dbf recid=3 stamp=724831186cataloged datafile copy datafile copy filename=/u01/app/oracle/oradata/orcl/example01.dbf recid=4 stamp=724831186datafile 2 switched to datafile copyinput datafile copy recid=1 stamp=724831185 filename=/u01/app/oracle/oradata/orcl/undotbs01.dbfdatafile 3 switched to datafile copyinput datafile copy recid=2 stamp=724831186 filename=/u01/app/oracle/oradata/orcl/sysaux01.dbfdatafile 4 switched to datafile copyinput datafile copy recid=3 stamp=724831186 filename=/u01/app/oracle/oradata/orcl/users01.dbfdatafile 5 switched to datafile copyinput datafile copy recid=4 stamp=724831186 filename=/u01/app/oracle/oradata/orcl/example01.dbfcontents of Memory Script:{Alter clone database open resetlogs;}executing Memory Scriptexecuting Memory Scriptdatabase openedFinished Duplicate Db at 18-JUL-10九、创建spfile，并验证数据库通过上面8步的操作，复制操作已经完成。我们现在创建一个spfile。SQL> create spfile from pfile="/u01/app/oracle/product/10.2.0/db_1/dbs/initorcl.ora";File created.SQL> select name from v$database;NAME---------ORCLSQL> select tablespace_name,file_name from dba_data_files;TABLESPACE_NAME FILE_NAME------------------------------ -------------------------------------------------SYSTEM /u01/app/oracle/oradata/orcl/system01.dbfUNDOTBS1 /u01/app/oracle/oradata/orcl/undotbs01.dbfSYSAUX /u01/app/oracle/oradata/orcl/sysaux01.dbfUSERS /u01/app/oracle/oradata/orcl/users01.dbfEXAMPLE /u01/app/oracle/oradata/orcl/example01.dbf十、在远程服务器上复制磁带备份如果在远程服务器上复制磁带备份，必须配置辅助通道，以反映介质管理器的需求。除了指定介质管理器和用于常规通道的类或池外，还必须指定目标客户端名称，如下所示：RMAN> configure auxiliary channel 1 device type sbt parms="env=（nb_ora_serv=db1,nb_ora_client=db2）";十一、使用DBNEWID 适用程序的不完全复制复制时最令人不满意的一点是不存在"可重启的复制"，也就是说，如果在执行还原所有文件的步骤（复制进程中最常出错）时出错。比如在恢复操作期间出错，就必须再次重启复制进程并重新还原文件。我们无法修复复制进程（如使丢失的归档日志可用），只能重新开始整个过程。将resote optimization 选项设置为on， rman 就不会在还原位置中再次还原具有相同数据文件头SCN信息文件。这也适合用于复制操作。如果复制操作还原一个文件，然后重新启动该复制操作，RMAN 将不会再次还原该文件。然后，如果将一个归档日志应用于该文件，则会再次还原该归档日志。在Oracle 10g中，使用DBNEWID使用程序可以部分修复恢复进程，这个使用程序以安全和可控的方式为复制的数据库指定新的DBID。我们可以手工恢复复制的数据库，准备所有元素，然后再次运行DBNEWID实用程序完成由复制操作启动的进程。这就允许我们至少可以手工完成复制操作。DBNEWID 使用程序的用法很简单。首先，必须确认在使用实用程序前生成了有效的备份，尽管要执行验证备份的进程，但是在修改DBID期间仍然可能会遇到不可恢复的错误。确认备份有效后，还必须在一致的状态中关闭数据库，然后将数据库切换回加载状态。使用示例如下：SQL> shutdown immediateDatabase closed.Database dismounted.ORACLE instance shut down.SQL> startup mount;ORACLE instance started.Total System Global Area 247463936 bytesFixed Size 1218772 bytesVariable Size 79693612 bytesDatabase Buffers 163577856 bytesRedo Buffers 2973696 bytesDatabase mounted.SQL> ！[oracle@localhost u01]$ nid target=/DBNEWID: Release 10.2.0.1.0 - Production on Tue Jul 20 07:20:37 2010Copyright （c） 1982, 2005, Oracle. All rights reserved.Connected to database ORCL （DBID=1252611919）Connected to server version 10.2.0Control Files in database:/u01/app/oracle/oradata/orcl/control01.ctl/u01/app/oracle/oradata/orcl/control02.ctl/u01/app/oracle/oradata/orcl/control03.ctlChange database ID of database ORCL （Y/[N]） => yProceeding with operationChanging database ID from 1252611919 to 1252672326Control File /u01/app/oracle/oradata/orcl/control01.ctl - modifiedControl File /u01/app/oracle/oradata/orcl/control02.ctl - modifiedControl File /u01/app/oracle/oradata/orcl/control03.ctl - modifiedDatafile /u01/app/oracle/oradata/orcl/system01.dbf - dbid changedDatafile /u01/app/oracle/oradata/orcl/undotbs01.dbf - dbid changedDatafile /u01/app/oracle/oradata/orcl/sysaux01.dbf - dbid changedDatafile /u01/app/oracle/oradata/orcl/users01.dbf - dbid changedDatafile /u01/app/oracle/oradata/orcl/example01.dbf - dbid changedDatafile /u01/app/oracle/oradata/orcl/temp01.dbf - dbid changedControl File /u01/app/oracle/oradata/orcl/control01.ctl - dbid changedControl File /u01/app/oracle/oradata/orcl/control02.ctl - dbid changedControl File /u01/app/oracle/oradata/orcl/control03.ctl - dbid changedInstance shut downDatabase ID for database ORCL changed to 1252672326.All previous backups and archived redo logs for this database are unusable.Database is not aware of previous backups and archived logs in Recovery Area.Database has been shutdown, open database with RESETLOGS option.Succesfully changed database ID.DBNEWID - Completed succesfully.更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=12Oracle技术之用RMAN克隆数据库Oracle基础教程之通过RMAN复制数据库相关资讯 RMAN RMAN异机复制数据库

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