Home Database Mysql Tutorial RAC之RedHat裸设备启动配置

RAC之RedHat裸设备启动配置

Jun 07, 2016 pm 04:46 PM
database

通过安装rac 10g for redhat as 4与rac 10g for redhat as 5发现配置裸设备的自启动不同下面列出两种版本下的配置1.linux redhat

通过安装rac 10g for RedHat as 4与rac 10g for redhat as 5发现配置裸设备的自启动不同

下面列出两种版本下的配置

1.linux redhat as 4

Edit the /etc/sysconfig/rawdevices file, adding the following lines. (增加裸设备映射)

/dev/raw/raw1 /dev/sdb1

/dev/raw/raw2 /dev/sdc1

//改变裸设备拥有者和组

chown Oracle:oinstall /dev/raw/raw1

chown oracle:oinstall /dev/raw/raw2

//改变设备访问权限

chmod 600 /dev/raw/raw1

chmod 600 /dev/raw/raw2

修改/etc/udev/permissions.d/50-udev.permissions,

[root@rac1 ~]# vi /etc/udev/permissions.d/50-udev.permissions

# raw devices

ram*:root:disk:0660

#raw/*:root:disk:0660

raw/*:oracle:dba:0660    机器启动时能自动加载给oracle用户使用。

2.linux redhat as 5

因为rh5中取消了rawdevices服务,要使用裸设备的话,需要做以下配置。

[root@raw1 ~]#vi /etc/udev/rules.d/60-raw.rules

添加以下部分的内容

ACTION=="add", KERNEL=="sdb1", RUN+="/bin/raw /dev/raw/raw1 %N"

-r9El:h'KDp3u0ACTION=="add", ENV{MAJOR}=="8", ENV{MINOR}=="1", RUN+="/bin/raw /dev/raw/raw2 %M %m"

//然后运行启动设备命令

[root@raw1 ~]# start_udev

starting udev: [  OK  ]

补充:

今天遇到了个问题,就是做ASM实例的时候用的一个硬盘,分成2个分区安装ASM的时候,ACTION=="add", ENV{MAJOR}=="8", ENV{MINOR}=="1", RUN+="/bin/raw /dev/raw/raw2 %M %m" 这里面的ENV{MINOR}=="1" 设置不对的情况下启动不了裸设备,如何正确设置呢?

突然想起来,裸设备支持到255个,每个硬盘16个分区,那么我挂载的是一个硬盘,在这个硬盘上分了3个分区,那么从设备号就是17,18,19,如何看从设备分区号呢,也可以通过这样查看,,进到DEV查看:ll /dev/* 看到你的分区的属性里有 8 17,8 18的字样即是了,想想大多数文档里做RAC的时候,都是采用3个虚拟机硬盘实现的,再设置的时候都是以 17,33,49 这样的从设备号进行配置的和挂载硬盘的,更加确认了我的思路。

linux

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