1、登录数据库：执行alter system set cluster_database = false scope=spfile;

2、关闭node1和node2数据库：shutdown immediate; 3、启动node1至mount状态：startup mount; 4、执行关闭归档：alter database noarchivelog; 5、开启数据库：alter database open; 6、在node1执行：alter system set cluster_database=true scope=spfile; 7、关闭数据库：shutdown immediate; 8、启动node1数据库：startup 9、启动node2数据库：startup