From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Inserting Calendar.Time in a database
Date: Wed, 25 Aug 2004 11:25:28 +0200
Date: 2004-08-25T11:25:28+02:00 [thread overview]
Message-ID: <34dzl9dpx3w0.4ghwziy6e7p9$.dlg@40tude.net> (raw)
In-Reply-To: 412c4958_1@baen1673807.greenlnk.net
On Wed, 25 Aug 2004 09:18:40 +0100, Martin Dowie wrote:
> Dmitry A. Kazakov wrote:
>> It is a requirement when UTC is used for time stamping.
>
> sounds more like a requierment of your system than of UTC itself to me, i.e.
> each loggable event must be uniquely tagged. You can always have a suitably
> faster counter (with a know Fx and usually '0' at power on :-) and then add
> this to a UTS synchronisation event.
This works only locally. Consider a distributed data acquisition and
control system. You measure some data at physically distinct places. The
sensors and actors are interconnected using say Ethernet. Ada is the best
candidate for implementing nodes of the system, right? Now, how would you
ensure data consistency across the system? A practical example, is a
mileage dynamometer. A test runs for weeks. Maximal data frequency is say 1
kHz.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2004-08-25 9:25 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-05 13:44 Inserting Calendar.Time in a database Jano
2004-08-05 15:21 ` Dmitry A. Kazakov
2004-08-05 21:19 ` Martin Dowie
2004-08-06 6:31 ` Jano
2004-08-06 11:32 ` Peter Hermann
2004-08-06 11:40 ` Duncan Sands
2004-08-08 11:10 ` Jano
2004-08-06 7:48 ` Dmitry A. Kazakov
2004-08-06 9:28 ` Martin Dowie
2004-08-06 10:44 ` Dmitry A. Kazakov
2004-08-07 9:50 ` Martin Dowie
2004-08-07 20:32 ` Dmitry A. Kazakov
2004-08-08 8:35 ` Martin Dowie
2004-08-08 11:03 ` Simon Wright
2004-08-09 7:46 ` Dmitry A. Kazakov
2004-08-09 17:54 ` Nick Roberts
2004-08-10 7:33 ` Dmitry A. Kazakov
2004-08-10 8:36 ` John B. Matthews
2004-08-10 18:51 ` Nick Roberts
2004-08-11 1:14 ` John B. Matthews
2004-08-19 4:10 ` Jano
2004-08-19 4:10 ` Jano
2004-08-09 11:52 ` Frank J. Lhota
2004-08-08 10:46 ` Simon Wright
2004-08-09 8:02 ` Dmitry A. Kazakov
2004-08-24 19:25 ` Randy Brukardt
2004-08-25 7:24 ` Dmitry A. Kazakov
2004-08-25 8:18 ` Martin Dowie
2004-08-25 9:25 ` Dmitry A. Kazakov [this message]
2004-08-25 9:42 ` Martin Dowie
2004-08-26 5:26 ` Simon Wright
2004-08-26 0:49 ` Randy Brukardt
2004-08-26 9:30 ` Dmitry A. Kazakov
2004-08-26 10:11 ` Martin Dowie
2004-08-26 10:58 ` Dmitry A. Kazakov
2004-08-26 12:32 ` Martin Dowie
2004-08-26 16:26 ` Dmitry A. Kazakov
2004-08-26 17:23 ` Martin Dowie
2004-08-26 18:55 ` Randy Brukardt
2004-08-26 20:04 ` Dmitry A. Kazakov
2004-08-26 5:22 ` Simon Wright
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