>>>>> "Sungo" == Sungo <[EMAIL PROTECTED]> writes:
Sungo> Rocco Caputo wrote:
>> I have heard conflicting stories about whether the time shift is
>> significant. Jeff Bisbee posted that systems based on UTC don't see
>> shifts in time() when DST/Standard arrive. Matt Cashner is convinced
>> that NTP prevents the problem from occurring.
Sungo> the combination of those two ideas pretty much guarantee a time shift
Sungo> less system on a well maintained box. ntp will keep the system time
Sungo> from drifting more than a few attoseconds from standard. and utc
Sungo> doesn't change. the epoch time where $ENV{TZ} is set to UTC, GMT or
Sungo> one of the other synonyms will see no time shift around the daylight
Sungo> saving time jumps.
Well, NTP generally uses adjtime(2) to get the time in sync, but
occasionally must catestrophically use settimeofday(2), which makes a
discontinuous jump. Consider a box that has gone off the net for a
day, drifting the local clock a minute or two badly, and suddenly
reconnects.
At least, that's my understanding.
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