关闭第一个节点：
通过 ssh 方式登录至主机上，执行如下命令：
$ emctl stop dbconsole
$ srvctl stop instance -d jzcddb -i jzcddb1 -o immediate
$ srvctl stop nodeapps -n sxcddb1
# crsctl stop crs
开启第一个节点：
通过 ssh 方式登录至主机上，执行如下命令：
# crsctl start crs
检查数据库启动是否正常
$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.jzcddb.db application ONLINE ONLINE sxcddb2
ora....b1.inst application ONLINE ONLINE sxcddb1
ora....b2.inst application ONLINE ONLINE sxcddb2
ora....B1.lsnr application ONLINE ONLINE sxcddb1
ora....db1.gsd application ONLINE ONLINE sxcddb1
ora....db1.ons application ONLINE ONLINE sxcddb1
ora....db1.vip application ONLINE ONLINE sxcddb1
ora....B2.lsnr application ONLINE ONLINE sxcddb2
ora....db2.gsd application ONLINE ONLINE sxcddb2
ora....db2.ons application ONLINE ONLINE sxcddb2
ora....db2.vip application ONLINE ONLINE sxcddb2
$ sqlplus / as sysdba
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE
关闭第二个节点：
通过 ssh 方式登录至主机上，执行如下命令：
$ emctl stop dbconsole
$ srvctl stop instance -d jzcddb -i jzcddb2 -o immediate
$ srvctl stop nodeapps -n sxcddb2
# crsctl stop crs
开启第二个节点：
通过 ssh 方式登录至主机上，执行如下命令：
# crsctl start crs
检查数据库启动是否正常
$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.jzcddb.db application ONLINE ONLINE sxcddb2
ora....b1.inst application ONLINE ONLINE sxcddb1
ora....b2.inst application ONLINE ONLINE sxcddb2
ora....B1.lsnr application ONLINE ONLINE sxcddb1
ora....db1.gsd application ONLINE ONLINE sxcddb1
ora....db1.ons application ONLINE ONLINE sxcddb1
ora....db1.vip application ONLINE ONLINE sxcddb1
ora....B2.lsnr application ONLINE ONLINE sxcddb2
ora....db2.gsd application ONLINE ONLINE sxcddb2
ora....db2.ons application ONLINE ONLINE sxcddb2
ora....db2.vip application ONLINE ONLINE sxcddb2
$ sqlplus / as sysdba
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE