Redhat 6 Oracle 11g RAC Installation notes

Redhat 6 Oracle 11g RAC Installation notes

I recently installed 11g RAC on RedHat 6. I have encountered several precautions to share with you:

Install Oracle 11gR2 (x64) in CentOS 6.4)

Steps for installing Oracle 11gR2 in vmwarevm

Install Oracle 11g XE R2 In Debian
 
1. SWAP must be greater than or equal to 16 GB; otherwise, an error is reported during the pre-check. Modification Method
 
Mkdir-p/home/swap

Dd if =/dev/zero of =/home/swap/swapfile bs = 1024 count = 16777216

Mkswap/home/swap/swapfile

Swapon/home/swap/swapfile
Edit/etc/fstab
/Home/swap/swapfile swap defaults 0 0
 

2. Set the host name/etc/hosts. Do not set the name to too long. It is better to set it to <5 characters. Otherwise, the computer name must be repeated during installation.
# 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. Set the IP address. Check that ONBOOT = YES so that the IP address can be started randomly.

# 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. Several important Kernel Parameters
Kernel. shmmax value must be greater than SGA
Kernel. shmmni = 8192 in version 110204, if it is set to 4 K, the memory overflow will be reported when the second machine runs root. sh.
Net. ipv4.ip _ local_port_range = 9000 65000 cannot be set to 1024 65000
Fs. file-max = 6815744
Fs. aio-max-nr = 1048576
 
5. Multi-path configuration, udev Mode
1) Use multipath
Find the DM_UUID corresponding to datalun according to the following information:
[Root @ rac2 ~] # For I in datalun datalunp1 datalunp2 datalunp3; do printf "% 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
Then, based on the following information, determine the correspondence between dm * And datalun.
For I in datalunp1 datalunp2 datalunp3; do printf "% s \ n" "$ I" "$ (ls-ll/dev/mapper/$ I)"; done
 
Datalunp1 lrwxrwxrwx. 1 root 7 Dec 21/dev/mapper/datalunp1-> ../dm-3
 
Datalunp2 lrwxrwxrwx. 1 root 7 Dec 21/dev/mapper/datalunp2-> ../dm-4
 
Datalunp3 lrwxrwxrwx. 1 root 7 Dec 21/dev/mapper/datalunp3-> ../dm-5
Create the/etc/udev/rules. d/99-oracle-asmdevices.rules file. The definition is as follows:
# 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"
 

Note: after the two machines are restarted, sometimes the aliases of dm in/dev/mapper/dm * are inconsistent. You can copy the/etc/multipath command from another machine. conf, and then restart to solve the problem.

Grant Permissions
Chown grid: asmadmin/dev/dm-* (3-11)
Chmod 777/dev/mapper/datalunp * (1-9)
 

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