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Date: Sun, 21 Jun 2020 10:11:50 +0300
From: "Adrian Bunk" <bunk@stusta.de>
To: csimmonds <chris@2net.co.uk>
Cc: yocto@lists.yoctoproject.org
Subject: Re: [yocto] Distro upgrade strategies
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On Fri, Jun 19, 2020 at 03:35:33PM +0100, csimmonds wrote:
> I would like to add that this is a design decision. Package updates, be
> they based on rpm, deb, or ipk, are not atomic. Which means that if you
> power off during an update the system will usually not boot afterwards.

This is not true, package manager like dpkg are trying very very hard to 
make things atomic where they have to be and allow recovery from any 
kind of interruption.

I do not recall anyone ever describing such a problem with Debian
(or Ubuntu) in over 20 years as Debian user/administrator/developer.

>...
> OpenEmbedded/Yocto
> Project expect the update will be done by programming a new root
> filesystem image.
>...

Note that what you write would imply that package management must not
ever be used on OpenEmbedded/Yocto devices.

If there is any potential problem, it would equally apply to the 
situation where you are upgrading just one package for a security
update.

> HTH,
> Chris

cu
Adrian