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04-21-2010 11:35 PM
04-21-2010 11:35 PM
NTP xntpd processes
Hi all,
I hv a query reg. ntp time sync:
Lets say the system time of system "X" is 12.00 hrs and system "Y" is 11.55 hrs.Now I configure System "X" as NTP server for system Y.when I start xntpd in the system "Y" the system clock of system Y will get syncronised to system "X". Now lets consider the following situations.
1.If system X , the ntp server is unavailable for a particular period of time ,what will happen to the system clock of system Y When xntpd in system Y is running.
2. If system X , the ntp server is unavailable for a particular period of time ,what will happen to the system clock of system Y When xntpd in system Y is not running.
3.If I deconfigure System Y as Ntp client of system X and make system Y as NTP server for other servers what will happen to the time of system X .As at the time of breaking the association the time will be in sync.When I make changes in /etc/ntp.conf in system Y and restarts xntpd how quickly it will drift towards its original clock.
I hv a query reg. ntp time sync:
Lets say the system time of system "X" is 12.00 hrs and system "Y" is 11.55 hrs.Now I configure System "X" as NTP server for system Y.when I start xntpd in the system "Y" the system clock of system Y will get syncronised to system "X". Now lets consider the following situations.
1.If system X , the ntp server is unavailable for a particular period of time ,what will happen to the system clock of system Y When xntpd in system Y is running.
2. If system X , the ntp server is unavailable for a particular period of time ,what will happen to the system clock of system Y When xntpd in system Y is not running.
3.If I deconfigure System Y as Ntp client of system X and make system Y as NTP server for other servers what will happen to the time of system X .As at the time of breaking the association the time will be in sync.When I make changes in /etc/ntp.conf in system Y and restarts xntpd how quickly it will drift towards its original clock.
1 REPLY 1
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04-22-2010 04:51 AM
04-22-2010 04:51 AM
Re: NTP xntpd processes
Hi:
The NTP configuration should include a 'drift' file. The purpose of this file is to hold a calculated "drift" or difference of your server's time from a source time.
The computation of an accurate drift value takes about 1-2 days, but once established, the value in this file allows NTP to compensate for deviations in your server's clock and to maintain a reasonably correct setting even if it is divorced from any external time source for some period of time.
Regards!
...JRF...
The NTP configuration should include a 'drift' file. The purpose of this file is to hold a calculated "drift" or difference of your server's time from a source time.
The computation of an accurate drift value takes about 1-2 days, but once established, the value in this file allows NTP to compensate for deviations in your server's clock and to maintain a reasonably correct setting even if it is divorced from any external time source for some period of time.
Regards!
...JRF...
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