近期在Redhat 6上安装11g RAC,碰到几个注意事项,汇总一下,供大家分享:
近期在RedHat 6上安装11g RAC,碰到几个注意事项,汇总一下,供大家分享:
在CentOS 6.4下安装Oracle 11gR2(x64)
Oracle 11gR2 在VMWare虚拟机中安装步骤
Debian 下 安装 Oracle 11g XE R2
1、SWAP一定要>=16G,否则在预检中报错。修改方式
mkdir -p /home/swap
dd if=/dev/zero of=/home/swap/swapfile bs=1024 count=16777216
mkswap /home/swap/swapfile
swapon /home/swap/swapfile
编辑/etc/fstab
/home/swap/swapfile swap swap defaults 0 0
2、设置主机名 /etc/hosts,名称不要设置过长,最好 # vi /etc/hosts
127.0.0.1 localhost
192.168.172.58 rac1 rac1-pub
10.0.0.58 rac1-priv
192.168.172.56 rac1-vip
192.168.172.59 rac2 rac2-pub
10.0.0.59 rac2-priv
192.168.172.117 rac2-vip
192.168.172.55 rac-scan
3、设置IP,,检查注意ONBOOT=YES,以便IP能随机启动
#vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=3398bf27-74b9-4e77-89e4-da0e33896cfe
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
4、几个需要注意的内核参数
kernel.shmmax 设置值必须大于SGA
kernel.shmmni = 8192 在110204版本中,如果设置为4K,在第二台机器执行root.sh时会报内存溢出
net.ipv4.ip_local_port_range = 9000 65000 不能设为1024 65000
fs.file-max = 6815744
fs.aio-max-nr = 1048576
5、多路径配置,udev模式
1)使用multipath
根据下面的显示,找到datalun对应的DM_UUID
[root@rac2 ~]# for i in datalun datalunp1 datalunp2 datalunp3; do printf "%s %s\n" "$i" "$(udevadm info --query=all --name=/dev/mapper/$i |grep -i dm_uuid)"; done
datalun E: DM_UUID=mpath-36001438009b064ce0000500000160000
datalunp1 E: DM_UUID=part1-mpath-36001438009b064ce0000500000160000
datalunp2 E: DM_UUID=part2-mpath-36001438009b064ce0000500000160000
datalunp3 E: DM_UUID=part3-mpath-36001438009b064ce0000500000160000
然后根据下面的显示,确定dm*与datalun的对应关系
for i in datalunp1 datalunp2 datalunp3; do printf "%s %s\n" "$i" "$(ls -ll /dev/mapper/$i)"; done
datalunp1 lrwxrwxrwx. 1 root root 7 Dec 21 21:08 /dev/mapper/datalunp1 -> ../dm-3
datalunp2 lrwxrwxrwx. 1 root root 7 Dec 21 21:08 /dev/mapper/datalunp2 -> ../dm-4
datalunp3 lrwxrwxrwx. 1 root root 7 Dec 21 21:08 /dev/mapper/datalunp3 -> ../dm-5
创建/etc/udev/rules.d/99-oracle-asmdevices.rules文件,定义内容如下:
# vi /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="dm-3",ENV{DM_UUID}=="part1-mpath-36001438009b064ce0000500000160000",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-4",ENV{DM_UUID}=="part2-mpath-36001438009b064ce0000500000160000",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-5",ENV{DM_UUID}=="part3-mpath-36001438009b064ce0000500000160000",OWNER="grid",GROUP="asmadmin",MODE="0660"
注意:重启两台机器后,有时出现/dev/mapper/dm*下,dm对应的别名顺序不一致,可以通过拷贝另一台机器/etc/multipath.conf,再重启解决
赋权限
chown grid:asmadmin /dev/dm-*(3-11)
chmod 777 /dev/mapper/datalunp*(1-9)
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