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Re: [Ntp] Circular dependencies

Philip Prindeville <philipp@redfish-solutions.com> Sun, 17 January 2021 02:19 UTC

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From: Philip Prindeville <philipp@redfish-solutions.com>
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Date: Sat, 16 Jan 2021 19:19:31 -0700
Cc: Watson Ladd <watsonbladd@gmail.com>, NTP WG <ntp@ietf.org>
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To: Hal Murray <hmurray@megapathdsl.net>
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Subject: Re: [Ntp] Circular dependencies
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> On Nov 11, 2020, at 5:02 PM, Hal Murray <hmurray@megapathdsl.net> wrote:
> 
> 2) Systems like the Raspberry Pi that have a real file system but no battery 
> backed clock.  We can store the time in the file system.  This works as long 
> as the systems are powered up often enough to keep the time in the file system 
> close enough.


I had to do this... ran a cron job to save the time every 5 minutes.

The issue isn't how often you're booted.  It's how long you've been shut down (i.e. how old is your last snapshot of the time).

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