Verify that the following startup commands are included on all nodes in the cluster!

Up to this point, you have read in great detail about the parameters and resources that need to be configured on all nodes for the Oracle10g RAC configuration. This section will ler you " take a deep breath" and recap those parameters, commands, and entries (in previous sections of this document) that need to happen on each node when the machine is booted.

For each of the startup files below, entries in gray should be included in each startup file.

/etc/modprobe.conf

(All parameters and values to be used by kernel modules.)

alias eth0 b44
alias eth1 tulip
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
options sbp2 exclusive_login=0
alias scsi_hostadapter sbp2
options hangcheck-timer hangcheck_tick=30 hangcheck_margin=180

/etc/sysctl.conf

(We wanted to adjust the default and maximum send buffer size as well as the default and maximum receive buffer size for the interconnect. This file also contains those parameters responsible for configuring shared memory, semaphores, and file handles for use by the Oracle instance.)

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 0

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0

# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1

# Default setting in bytes of the socket receive buffer
net.core.rmem_default=262144

# Default setting in bytes of the socket send buffer
net.core.wmem_default=262144

# Maximum socket receive buffer size which may be set by using
# the SO_RCVBUF socket option
net.core.rmem_max=262144

# Maximum socket send buffer size which may be set by using
# the SO_SNDBUF socket option
net.core.wmem_max=262144

# +---------------------------------------------------------+
# | SHARED MEMORY                                           |
# +---------------------------------------------------------+
kernel.shmmax=2147483648

# +---------------------------------------------------------+
# | SEMAPHORES                                              |
# | ----------                                              |
# |                                                         |
# | SEMMSL_value  SEMMNS_value  SEMOPM_value  SEMMNI_value  |
# |                                                         |
# +---------------------------------------------------------+
kernel.sem=250 32000 100 128

# +---------------------------------------------------------+
# | FILE HANDLES                                            |
# ----------------------------------------------------------+
fs.file-max=65536

/etc/hosts

(All machine/IP entries for nodes in our RAC cluster.)

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1        localhost.localdomain   localhost
# Public Network - (eth0)
192.168.1.100    linux1
192.168.1.101    linux2
# Private Interconnect - (eth1)
192.168.2.100    int-linux1
192.168.2.101    int-linux2
# Public Virtual IP (VIP) addresses for - (eth0)
192.168.1.200    vip-linux1
192.168.1.201    vip-linux2
192.168.1.106    melody
192.168.1.102    alex
192.168.1.105    bartman

/etc/hosts.equiv

(Allow logins to each node as the oracle user account without the need for a password.)

+linux1 oracle
+linux2 oracle
+int-linux1 oracle
+int-linux2 oracle

/etc/rc.local

(Loading the hangcheck-timer kernel module.)

#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local

# +---------------------------------------------------------+
# | HANGCHECK TIMER                                         |
# | (I do not believe this is required, but doesn't hurt)   |
# ----------------------------------------------------------+

/sbin/modprobe hangcheck-timer