Thursday, June 19, 2014

NTP tips for hadoop cluster

Below is quick tips to setup NTP server and sync the whole hadoop cluster.

1. Configure hdm as the NTP server.

vi /etc/ntp.conf:
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10

2. Configure others as NTP clients

vi /etc/ntp.conf:
server hdm.xxx.com

3. Start ntpd on all servers.

service ntpd start

4. Enable ntpd on all servers.

chkconfig ntpd on

5. Make sure NTP server has sycned with itself

ntpq -p

6. Check NTP clients

ntpdate -q hdm

7. Troubleshooting on NTP client

ntpdate -d hdm

8. Sample&Minimum /etc/ntp.conf

On server side:
driftfile /var/lib/ntp/drift
restrict 192.111.111.0 mask 255.255.255.0 nomodify notrap
restrict 127.0.0.1
restrict -6 ::1
server  127.127.1.0     # local clock
fudge   127.127.1.0 stratum 10
keys /etc/ntp/keys
On client side:
driftfile /var/lib/ntp/drift
server hdm.xxx.com prefer true iburst
keys /etc/ntp/keys

1 comment:

  1. Attend The Business Analytics Courses From ExcelR. Practical Business Analytics Courses Sessions With Assured Placement Support From Experienced Faculty. ExcelR Offers The Data Analytics Courses.
    Business Analytics Courses

    ReplyDelete

Popular Posts