首先是将主机的IP地址，调整到RAC服务器IP地址附近，方便管理。修改目标主机IP地址到172.25.198.226。

# ifconfig ce0 172.25.198.226 netmask 255.255.0.0 broadcast 172.25.255.255

然后修改/etc/hosts文件中的IP地址。

下面将主机名也修改为配套的主机名信息racnode3：

# hostname       
supingsol
# hostname racnode3

利用hostname设置主机名后，还要分别修改/etc/hosts、/ect/nodename、/etc/hostname.ce0、/etc/net/ticlts/hosts、/etc/net/ticots/hosts、/etc/net/ticotsord/hosts这6个文件：

# more /etc/hosts
#
# Internet host table
#
127.0.0.1       localhost      
172.25.198.226  racnode3        loghost
192.168.192.109 rw     
# more /etc/nodename
racnode3
# more /etc/hostname.ce0
racnode3
# more /etc/net/ticlts/hosts
#
# Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# ident "@(#)hosts      1.3     03/12/07 SMI"
#
# NOTE: This file is no longer consulted and may be removed from a future
#       release of Solaris.
#
racnode3
# more /etc/net/ticots/hosts
#
# Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# ident "@(#)hosts      1.3     03/12/07 SMI"
#
# NOTE: This file is no longer consulted and may be removed from a future
#       release of Solaris.
#
racnode3
# more /etc/net/ticotsord/hosts
#
# Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# ident "@(#)hosts      1.3     03/12/07 SMI"
#
# NOTE: This file is no longer consulted and may be removed from a future
#       release of Solaris.
#
racnode3

下面添加用户和组信息，根据RAC节点的组信息和用户信息在当前节点创建用户和组：

# groupadd -g 100 oinstall
# groupadd -g 101 dba
# mkdir /export/home/oracle
# useradd -u 100 -g oinstall -G dba -d /export/home/oracle oracle
# chown oracle:oinstall /export/home/oracle
# mkdir /data
# chown -R oracle:oinstall /data
# id nobody
uid=60001(nobody) gid=60001(nobody)
# passwd oracle

用Oracle用户登陆，设置环境变量：

# su - oracle
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
$ vi .profile
".profile"［新文件］
umask 022
ORACLE_SID=testrac3
export ORACLE_SID
ORACLE_BASE=/data/oracle
export ORACLE_BASE
ORACLE_HOME=/data/oracle/product/10.2/database
export ORACLE_HOME
NLS_LANG='SIMPLIFIED CHINESE_CHINA.ZHS16GBK'
export NLS_LANG
PATH=$PATH:$ORACLE_HOME/bin
export PATH
DISPLAY=172.25.6.201:1.0
export DISPLAY

修改/etc/hosts文件添加public id, private id和vitual id：

# vi /etc/hosts
"/etc/hosts"［只读取］ 13 行，300 字符
#
# Internet host table
#
127.0.0.1       localhost
172.25.198.226 racnode3 loghost
172.25.198.227 racnode3-vip
10.0.0.3 racnode3-priv
172.25.198.222 racnode1
172.25.198.224 racnode1-vip
10.0.0.1 racnode1-priv
172.25.198.223 racnode2
172.25.198.225 racnode2-vip
10.0.0.2 racnode2-priv

在其他两个节点，分别添加下面的内容：

172.25.198.226 racnode3
172.25.198.227 racnode3-vip
10.0.0.3 racnode3-priv

在节点1、节点2和当前节点，编辑/export/home/oracle/.rhosts文件，内容如下：

racnode1
racnode1-vip
racnode1-priv
racnode2
racnode2-vip
racnode2-priv
racnode1
racnode1-vip
racnode1-priv
racnode2
racnode2-vip
racnode2-priv
racnode3
racnode3-vip
racnode3-priv

在当前服务器上，添加PRIVATE IP地址：

# ifconfig -a
lo0: flags=2001000849 mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
ce0: flags=1000843 mtu 1500 index 2
        inet 172.25.198.226 netmask ffff0000 broadcast 172.25.255.255
        ether 0:3:ba:2c:d8:da
# ifconfig ce1 plumb
# ifconfig ce1 10.0.0.3 netmask 255.255.255.0 broadcast 10.0.0.255 up

为了启动后，ce1可以自动配置，编辑/etc/hostname.ce1文件：

racnode3-priv

然后添加相应的掩码和广播地址，在/etc/netmasks文件后面添加：

10.0.0.0        255.255.0.0

另外需要添加默认的网关/etc/defaultrouter：

172.25.13.1

检查nscd进程是否启动：

# ps -ef|grep nscd
    root   162     1   0   3月 12 ?           1:13 /usr/sbin/nscd
    root  4498  4418   0 17:33:49 pts/1       0:00 grep nscd

如果没有启动，可以使用/etc/init.d/nscd start来启动。

在两个节点上下面检查软件包是否都已经安装：

# uname -r
5.10
# pkginfo -i SUNWarc SUNWbtool SUNWhea SUNWlibC SUNWlibm SUNWlibms SUNWsprot SUNWtoo SUNWi1of SUNWxwfnt
system      SUNWarc   Lint Libraries (usr)
system      SUNWbtool CCS tools bundled with SunOS
system      SUNWhea   SunOS Header Files
system      SUNWi1of  ISO-8859-1 (Latin-1) Optional Fonts
system      SUNWlibC  Sun Workshop Compilers Bundled libC
system      SUNWlibm  Math & Microtasking Library Headers & Lint Files (Usr)
system      SUNWlibms Math & Microtasking Libraries (Usr)
system      SUNWsprot Solaris Bundled tools
system      SUNWtoo   Programming Tools
system      SUNWxwfnt X Window System platform. required fonts

编辑/etc/system，设置核心参数：

set noexec_user_stack=1
set semsys:seminfo_semmni=100
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmsl=256
set semsys:seminfo_semvmx=32767
set shmsys:shminfo_shmmax=21474836479
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10

检查UDP协议配置：

# ndd /dev/udp udp_xmit_hiwat
57344
# ndd /dev/udp udp_recv_hiwat
57344

这个值已经很接近Oracle的推荐值了，这里就不修改了。

下面重启系统，安装的准备工作到此结束。

# init 6