參考文件：
How to remove/delete a node from Grid Infrastructure Clusterware when the node has failed (文件 ID 1262925.1)
 
刪除資料庫例項：
可以使用dbca圖形介面刪除
也可以使用dbca靜默方式刪除rac1中的資料庫例項：
[oracle@rac2 bin]$ dbca -silent -deleteInstance -nodeList rac1 -gdbName orcl -instanceName orcl1 -sysDBAUserName sys -sysDBAPassword oracle
Deleting instance
1% complete
2% complete
6% complete
13% complete
20% complete
26% complete
33% complete
40% complete
46% complete
53% complete
60% complete
66% complete
Completing instance management.
100% complete
 
 
更新RAC節點資訊：
[oracle@rac2 bin]$ echo $ORACLE_HOME
/oracle/app/oracle/product/11.2.0/db_1/oui/bin/
 
[oracle@hisrac02 bin]$  ./runInstaller -updateNodeList ORACLE_HOME=/oracle/app/oracle/product/11.2.0/db_1 "CLUSTER_NODES=hisrac02" 
Starting Oracle Universal Installer...
 
Checking swap space: must be greater than 500 MB.   Actual 62924 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /oracle/app/oraInventory
 
 
檢視叢集節點資訊：
[root@hisrac02 bin]#  ./crsctl stat res -t |grep vip
ora.hisrac02.vip
ora.scan1.vip
 
刪除rac1節點的vip：
[root@hisrac02 bin]# ./srvctl remove vip -i rac1 -f
 
檢視叢集節點資訊：
[root@hisrac02 bin]# ./olsnodes -s -t
hisrac01        Inactive        Unpinned
hisrac02        Active  Unpinned
 
從叢集中刪除節點1：
[root@hisrac2 bin]# ./crsctl delete node -n hisrac01
CRS-4661: Node rac1 successfully deleted.
 
更新叢集節點資訊：
[grid@hisrac02 bin]$  ./runInstaller -updateNodeList ORACLE_HOME=/oracle/app/oracle/product/11.2.0/db_1 "CLUSTER_NODES=hisrac02" 
Starting Oracle Universal Installer...
 
Checking swap space: must be greater than 500 MB.   Actual 62929 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /oracle/app/oraInventory
'UpdateNodeList' was successful.
 
檢查確認僅剩餘hisrac02節點：
[grid@hisrac02 bin]$ olsnodes
hisrac02
 
 
至此，從叢集中清理hisrac01資訊完畢。

oracle 11g rac新增節點前之清除節點資訊

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