I have 4 computers on a LAN that need to have their system clocks closely synchronized within a ms or so if possible. I have just installed a GPS based time server (ESE-104A) on the LAN. At this point the LAN is connected to a router and the internet but the router will not be connected to the internet when operational.
In operation the whole system will be started when power is applied to the machines, NTP server, and router.
How can I set Ubuntu to sync every so many minutes and calculate what the period should be?
How can I get an idea of how long it takes to settle down and what the quality of the time keeping is?
I found a reference, from around 2000 perhaps, that suggests that the hwclock should be synched from the system time only at shut down. Should I do this and how?
What log files should I keep?
Here's the results of "ntpq -
remote refid st t when poll reach delay offset jitter *nts .M-@M-(^AM-R. 1 u 29 128 377 38.912 -7.739 7.195
Here's my ntp.conf (I use IPv4 only)
driftfile /etc/ntp.drift statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable server 192.168.1.210 restrict -4 default kod notrap nomodify nopeer noquery restrict -6 default kod notrap nomodify nopeer noquery restrict 127.0.0.1 restrict ::1
Please be gentle, I'm an ecologist - not a SYSADMIN.