Re: Time delaying (or time lagging)

[happymaster23 <happymaster23@xxxxxxxxx>]

...and sorry, I have forgot to include printout from ntptrace, so:

localhost.localdomain: stratum 2, offset 0.000029, synch distance 0.949418
tak.cesnet.cz: stratum 1, offset 0.000000, synch distance 0.002272, refid 'GPS'

2008/9/8 happymaster23 <happymaster23@xxxxxxxxx>

Thank you very much,

all is working perfectly. I am using ntp.nic.cz (CZ NIC is cz TLD registry), tak.cesnet.cz (CESNET is czech academic network) and 1.cz.pool.ntp.org. I think, that this servers are good? Am I right? Or is better to use more NTP servers?

Thanks

2008/9/6 John R Pierce <pierce@xxxxxxxxxxxx>

happymaster23 wrote:

Hello everyone,

I have problem with time delaying on my CentOS powered server. I have tried to set time in BIOS and in OS (with saving time to BIOS), but time still delaying, so after month is about five minutes delayed. In past I was using this box with Windows and there wasn´t this time problem, but I cant warrant, that there are no hardware issues. So I was decided, that easiest way to fix this problem will be setting up the NTP. I have found many howtos, but I don´t believe them. So my question is: How to clearly set NTP in CentOS 5?

  # yum install ntp

then, edit /etc/ntp.conf, and at a minimum specify some ntp servers and restrict access to localhost...

  restrict 127.0.0.1
  restrict -6 ::1

  # Use public servers from the pool.ntp.org project.
  # Please consider joining the pool (http://www.pool.ntp.org/join.html).
  server ntp1.sf-bay.org
  server ntp2.sf-bay.org
  server reloj.kjsl.com
  server ntp1.mainecoon.com
  server ntp2.mainecoon.com
  server time.berkeley.netdot.net



(note, those are the LOCAL TO ME ntp servers that *I* am using, you should undoubtedly use others as appropriate, or use the pool servers... see http://ntp.isc.org/bin/view/Servers/WebHome for guidelines)...

finally...

  # chkconfig ntpd on
  # service ntpd start

and wait about 20 mins for it to sync up, and verify functionality with ntptrace...

  # ntptrace
  localhost.localdomain: stratum 3, offset 0.004351, synch distance 0.088396
  zorro.sf-bay.org: stratum 2, offset 0.000543, synch distance 0.044773
  clock.via.net: stratum 1, offset 0.000027, synch distance 0.000446, refid 'GPS'

if your systems clock is particularlly funky, it may be a good idea to edit, /etc/sysconfig/ntpd  and set SYNC_HWCLOCK=yes rather than no.
(this tells it to set your HW CMOS clock when it sets the system clock during the initial synchronization)


_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos

_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos