ps -ef|grep pmon

你就知道你当前登陆机器的运行中的ORACLE_SID了

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客户端连接RAC

三台主机的IP映射必须写在hosts

连接scan的机器，必须用主机名连接，后跟global database name

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rac的hosts文件，一定要写

127.0.0.1 ?localhost ? localhost

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清除RAC环境

rm -rf /u01/11.2.0/grid/*

rm -rf /u01/app/oracle/*

rm -rf /u01/app/grid/*

rm -rf /u01/app/oraInventory/*

rm -rf /etc/ora*

chown -R oracle:oinstall /u01/app

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修改裸设备权限

chown oracle:asmadmin /dev/sdb1

chmod 777 /dev/sdb1

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增加VIP

srvctl add nodeapps -n rac2 -A 192.168.0.102/255.255.255.0/eth1

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修改VIP地址

srvctl modify nodeapps -n rac1 -A 192.168.0.101/255.255.255.0/eth1

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重新配置SCAN-IP的步骤：

查看SCAN-IP配置:
[root@rac1 bin]# ./srvctl config scan
SCAN name: scan-ip, Network: 1/10.0.4.0/255.255.255.0/eth0
SCAN VIP name: scan1, IP: /scan-ip/192.168.175.233

关闭SCAN-IP和SCAN_LISTENER服务：
[root@rac1 bin]# ./srvctl stop scan_listener
[root@rac1 bin]# ./srvctl stop scan
[root@rac1 bin]# ./srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is not running
[root@rac1 bin]# ./srvctl status scan_listener
SCAN Listener LISTENER_SCAN1 is enabled
SCAN listener LISTENER_SCAN1 is not running

修改SCAN-IP配置：
[root@rac1 bin]# ./srvctl modify scan -n scan-ip#/etc/hosts里的SCAN-IP名字
[root@rac1 bin]# ./srvctl config scan
SCAN name: scan-ip, Network: 1/