From: david@lang.hm
To: George Lambert <marchon@gmail.com>
Cc: cerowrt-devel@lists.bufferbloat.net
Subject: Re: [Cerowrt-devel] cerowrt 3.3.8-17: nice latency improvements, some issues with bind
Date: Mon, 20 Aug 2012 13:48:34 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.02.1208201344400.23568@asgard.lang.hm> (raw)
In-Reply-To: <CAC938DiarPg3OHOtPO1T8+LeG_jux526btzT1MGoBT4VKhSmgA@mail.gmail.com>
On Mon, 20 Aug 2012, George Lambert wrote:
> Check and set the time by syncing to NTP Servers - not user supplied times
> if the network
> is available. to see if they have set times > those set by NTP Server
In theory you are right, in practice you are not.
it's not uncommon for systems to point at a local set of timeservers (GPS
based for example), sometimes things go wrong with those servers, and so
people configure a local fallback (because they need the clocks on the
systems to remain consistant for things like kerberos to keep working).
This leads to a failure mode where if something goes wrong on that system,
the time can get set via NTP to some time in the future.
There needs to be a way to recover from such conditions.
The recent problems that people had with leap seconds is an indication
that even if you do use Internet NTP servers, sometimes things go wrong.
David Lang
next prev parent reply other threads:[~2012-08-20 20:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-13 6:08 [Cerowrt-devel] cerowrt 3.3.8-17 is released Dave Taht
2012-08-13 16:06 ` Maciej Soltysiak
2012-08-13 16:20 ` Dave Taht
2012-08-15 17:23 ` Sebastian Moeller
2012-08-15 22:53 ` dpreed
2012-08-15 22:57 ` William Katsak
2012-08-16 4:54 ` Sebastian Moeller
2012-08-16 11:08 ` William Katsak
2012-08-16 17:02 ` dpreed
2012-08-20 18:17 ` Sebastian Moeller
2012-08-16 4:51 ` Sebastian Moeller
2012-08-16 4:58 ` Dave Taht
2012-08-16 6:09 ` Sebastian Moeller
2012-08-20 18:13 ` Sebastian Moeller
2012-08-16 4:08 ` Dave Taht
2012-08-16 5:15 ` Sebastian Moeller
2012-08-20 18:24 ` Sebastian Moeller
2012-08-21 2:33 ` dpreed
2012-08-21 2:44 ` Marchon
2012-08-21 5:28 ` Sebastian Moeller
2012-08-22 18:23 ` dpreed
2012-08-22 18:54 ` Dave Taht
2012-08-22 19:23 ` Kenneth Finnegan
2012-08-22 20:44 ` Dave Taht
2012-08-21 5:23 ` Sebastian Moeller
2012-08-17 8:52 ` [Cerowrt-devel] cerowrt 3.3.8-17: nice latency improvements, some issues with bind Török Edwin
2012-08-17 18:05 ` Dave Taht
2012-08-17 19:05 ` Török Edwin
2012-08-17 19:52 ` Dave Taht
2012-08-17 20:13 ` Török Edwin
2012-08-18 20:16 ` Michael Richardson
2012-08-20 20:16 ` david
2012-08-20 20:41 ` George Lambert
2012-08-20 20:48 ` david [this message]
2012-08-20 21:27 ` George Lambert
2012-08-20 23:19 ` Michael Richardson
2012-08-21 22:03 ` Maciej Soltysiak
2012-08-21 22:31 ` George Lambert
2012-08-22 1:21 ` Michael Richardson
2012-08-18 9:38 ` Török Edwin
2012-08-18 10:20 ` [Cerowrt-devel] [Bloat] " Jonathan Morton
2012-08-18 17:07 ` [Cerowrt-devel] " Dave Taht
2012-08-25 13:56 ` Török Edwin
2012-08-25 18:09 ` Dave Taht
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