[tz] [Tzdist-bis] [calsify] tzdist and IANA
lists at luigirosa.com
Thu Jul 18 13:27:53 UTC 2019
Daniel Migault wrote on 18/07/2019 15:07:
> >> Wouldn't it be nice to have an infrastructure similar to what the NTP
> >> pool provides for time synchronization?
My two cents of an admin of hosts (mainly Windows) that travel back and forth
thru the seven seas (namely Cruise ships).
Short version: TZ sync is a pain in the arse.
You cannot use UTC for all the hosts because, for instance, some of them show
information to the guests or are used to manage crew shifts (always expressed in
On some ships the so called "master clock" has two NTP servers: one "classic"
UTC and the other with ship time.
We cannot use ship time NTP server because NTP clients (correctly) assume that
NTP is about UTC, while the local time is just a "logical view" of NTP. If we
sync Windows hosts with ship time the result is a mess (somebody said "Kerberos"?).
We concocted a simple way to sync TZ between Windows hosts.
The "TZ Server" runs the command
tzutil /g > c:\tz\tz.txt
C:\tz is shared as TZ
Every client issue the commands
set /p TZ=<\\TZSERVER\TZ\TZ.TXT
tzutil /s "%TZ%"
The procedure is tested on Win2016, 2012R2 and Win10
Detailed info in my blog article:
The original is in Italian:
More information about the tz