[Dovecot] ntp revisited (so what to do ?)
Per Jessen
per at computer.org
Mon May 9 11:25:35 EEST 2011
Stan Hoeppner wrote:
> On 5/9/2011 1:31 AM, Per Jessen wrote:
>> Stan Hoeppner wrote:
>
>>> This is not correct. You're assuming that ntpd doesn't perform
>>> sanity checks on the system time when the daemon starts, which is
>>> not the case.
>>
>> The sanity check may be disabled with -g in which case using
>> ntpdate/sntp/ntpd -q at start up becomes pointless.
>
> 'ntpdate -q' has always been 'pointless', unless you just want to look
> at the offset without modifying the clock.
Sure, I meant 'ntpd -q'.
> Mt nptd server is Debian Squeeze atop kernel 2.6.34.1, running ntp
> 4.2.6.p2+dfsg-1+b1. The machine is home grown w/ an 11 year old Abit
> main board. 0.003 seconds offset, not too shabby. ;) I've seen
> offset with 4 leading zeros (after the decimal) in the past. I've
> never seen less than two leading zeros. For most applications on my
> network, time this accurate is overkill, but it's nice to have.
For me, it's more important that all machines (local & remote) are
running the same time. Locally I sync to DCF77, externally I use the
datacentre-provided NTP source. Anyway, we're way OT.
/Per Jessen, Zürich
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