Linux操作系统中运行Oracle RAC 10.2.0.4双节点(ora1和ora2)。ora1的两块盘损坏导致系统故障，剩下一个ora2正常运行并继续对外提供服务。重做完系统后，如何保证在应用不停机的情况下快速恢复RAC 的两节点环境呢？方法如下:

1、ora1重做操作系统(版本、系统参数保持一致)；

2、ora1上配置Oracle环境(ASM、裸设备等)；

3、ora1上创建Oracle用户(UID以及GID与ora2保持一致)并配置互信访问机制；

4、将ora2节点的Oracle家目录进行打包并传到ora1节点，如下：

[root@ora2~]#tar-cfu01.tar/u01/app

[root@ora2~]#scpu01.tarora1:/root

5、ora1上解压u01.tar并运行CRS的root.sh脚本：

运行root.sh就会重新将一些配置信息写入的/etc/init.d 等目录中。OCR 中因为已经有这个节点的资源了，所以会自动显示成功配置。

[root@ora1/]#tar-xf/root/u01.tar

[root@ora1/]#cd/u01/app/crs

[root@ora1crs]#./root.sh

WARNING:directory'/u01/app'isnotownedbyroot

WARNING:directory'/u01'isnotownedbyroot

CheckingtoseeifOracleCRSStackisalreadyconfigured

/etc/oracledoesnotexist.Creatingitnow.

SettingthepermissionsonOCRbackupdirectory

SettingupNSdirectories

OracleClusterRegistryconfigurationupgradedsuccessfully

WARNING:directory'/u01/app'isnotownedbyroot

WARNING:directory'/u01'isnotownedbyroot

clscfg:EXISTINGconfigurationversion3detected.

clscfg:version3is10GRelease2.

SuccessfullyaccumulatednecessaryOCRkeys.

Usingports:CSS=49895CRS=49896EVMC=49898andEVMR=49897.

node:

node1:ora1ora1-privora1

node2:ora2ora2-privora2

clscfg:Argumentscheckoutsuccessfully.

NOKEYSWEREWRITTEN.Supply-forceparametertooverride.

-forceisdestructiveandwilldestroyanyprevIoUscluster

configuration.

OracleClusterRegistryforclusterhasalreadybeeninitialized

Startupwillbequeuedtoinitwithin30seconds.

Addingdaemonstoinittab

ExpectingtheCRSdaemonstobeupwithin600seconds.

CSSisactiveonthesenodes.

ora1

ora2

CSSisactiveonallnodes.

WaitingfortheOracleCRSDandEVMDtostart

OracleCRSStackinstalledandrunningunderinit(1M)

Runningvipca(silent)forconfiguringnodeapps

CreatingVIPapplicationresourceon(0)nodes.

CreatingGSDapplicationresourceon(0)nodes.

CreatingONSapplicationresourceon(0)nodes.

StartingVIPapplicationresourceon(2)nodes...

StartingGSDapplicationresourceon(2)nodes

StartingONSapplicationresourceon(2)nodes

DONE.

6、复制ora2的/etc/oratab至ora1：

[root@ora2~]#ls-l/etc/oratab

-rw-rw-r--1oracleroot765Oct302009/etc/oratab

[root@ora2~]#cat/etc/oratab

.........

+ASM2:/u01/app/oracle/product/10.2.0/db_1:N

odb:/u01/app/oracle/product/10.2.0/db_1:N

[root@ora2~]#scp/etc/oratabora1:/etc/

[root@ora1~]#chownoracle:root/etc/oratab

//编辑/etc/oratab文件，将里面的+ASM2修改为+ASM1.

[root@ora1~]#cat/etc/oratab

.........

+ASM1:/u01/app/oracle/product/10.2.0/db_1:N

odb:/u01/app/oracle/product/10.2.0/db_1:N

7、运行RDBMS的root.sh脚本：

[root@ora1~]#cd/u01/app/oracle/product/10.2.0/db_1/

[root@ora1db_1]#./root.sh

RunningOracle10root.shscript...

Thefollowingenvironmentvariablesaresetas:

ORACLE_OWNER=oracle

ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1

Enterthefullpathnameofthelocalbindirectory:[/usr/local/bin]:

Copyingdbhometo/usr/local/bin...

Copyingoraenvto/usr/local/bin...

Copyingcoraenvto/usr/local/bin...

Entrieswillbeaddedtothe/etc/oratabfileasneededby

DatabaseConfigurationAssistantwhenadatabaseiscreated

Finishedrunninggenericpartofroot.shscript.

Nowproduct-specificrootactionswillbeperformed.

8、修改$ORACLE_HOME/network/admin/listener.ora文件，将ora2的相关信息替换为ora1的。另外，监听名称不再是默认的listener了，而是listener_ora1。

9、创建$ORACLE_HOME/dbs/下的spfile以及密码文件。

[oracle@ora1~]$cd$ORACLE_HOME/dbs

[oracle@ora1dbs]$cpinitodb2.orainitodb1.ora

[oracle@ora1dbs]$cpinit+ASM2.orainit+ASM1.ora

[oracle@ora1dbs]$cporapw+ASM2orapw+ASM1

[oracle@ora1dbs]$cporapwodb2orapwodb1

10、启动所有rac资源:

[oracle@ora1~]$crs_start-all

Attemptingtostart`ora.odb.odb_taf.odb1.srv`onmember`ora1`

Attemptingtostart`ora.ora1.LISTENER_ORA1.lsnr`onmember`ora1`

Startof`ora.odb.odb_taf.odb1.srv`onmember`ora1`succeeded.

Startof`ora.ora1.LISTENER_ORA1.lsnr`onmember`ora1`succeeded.

[oracle@ora1~]$crs_stat-t-v

NameTypeR/RAF/FTTargetStateHost

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

ora.odb.dbapplication0/00/1ONLINEONLINEora2

ora....b1.instapplication0/50/0ONLINEONLINEora1

ora....b2.instapplication0/50/0ONLINEONLINEora2

ora...._taf.csapplication0/00/1ONLINEONLINEora1

ora....db1.srvapplication0/00/0ONLINEONLINEora1

ora....db2.srvapplication0/00/0ONLINEONLINEora2

ora....SM1.asmapplication0/50/0ONLINEONLINEora1

ora....A1.lsnrapplication0/50/0ONLINEONLINEora1

ora.ora1.gsdapplication0/50/0ONLINEONLINEora1

ora.ora1.onsapplication0/30/0ONLINEONLINEora1

ora.ora1.vipapplication0/00/0ONLINEONLINEora1

ora....SM2.asmapplication0/50/0ONLINEONLINEora2

ora....A2.lsnrapplication0/50/0ONLINEONLINEora2

ora.ora2.gsdapplication0/50/0ONLINEONLINEora2

ora.ora2.onsapplication0/30/0ONLINEONLINEora2

ora.ora2.vipapplication0/00/0ONLINEONLINEora2

到此，ora1已成功添加进RAC环境。

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