[Dovecot] time going back
Timo Sirainen
tss at iki.fi
Mon Oct 29 22:33:43 EET 2007
On Mon, 2007-10-29 at 03:35 +0100, Marcin Gryszkalis wrote:
> btw, while checking results of nightly DST change I re-sync-ed one of my boxes
> to ntp server with rdate and got
>
> Oct 28 10:32:48 sas dovecot: Time just moved backwards by 1099 seconds. This
> might cause a lot of problems, so I'll just kill myself now.
>
> 1099 seconds is ~18 minutes
>
> How much is too much for dovecot?
More than 5 seconds and Dovecot kills itself. <=5 seconds and Dovecot
logs a warning and sleeps until it's back in present.
> Do you think using -a on rdate would not cause such effect?
>
> fyi rdate(8):
> -a Use the adjtime(2) call to gradually skew the local time to the
> remote time rather than just hopping.
It wouldn't, but it would probably take quite a long time.
Why don't you just run ntpd to keep the time correct all the time?
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