[Oracle RAC 11.2 Installation on Oracle Linux 5.8 x86_64]: Configuring time synchronization services

Time settings

Server:

node1, node2, storage

Specify available ntp servers

# vi /etc/ntp.conf

server 0.rhel.pool.ntp.org
server 1.rhel.pool.ntp.org
server 2.rhel.pool.ntp.org

Make changes to the ntpd parameters file

# vi /etc/sysconfig/ntpd

replace

# Drop root to id 'ntp:ntp' by default.
OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid"

with

# Drop root to id 'ntp:ntp' by default.
# OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid"
OPTIONS="-x -u ntp:ntp -p /var/run/ntpd.pid"

# service ntpd restart