an idea about upgrades

[jd1008]

On 05/13/2015 06:20 PM, Matthew Miller wrote:
> On Tue, May 12, 2015 at 11:53:38AM -0600, jd1008 wrote:
>> It would be a great idea if Fedora would provide
>> a way to downgrade to the immediately previous release
>> (from which the upgrade was performed), if the user
>> decides (for some reason) to return to the previous
>> release. This would completely obviate the need to
>> do a backup, and restore - especially for a 1TB or
>> more drives (I have a 4TB drive, for example).
> So, as has been noted, this is hard with RPM, because RPM has a lot of
> assumptions that backwards isn't something one needs to care about. The
> snapshot approaches are one solution. However, there _is_ another idea
> we're kicking around. Take a look at Project Atomic —
> http://www.projectatomic.io/ — and its Fedora Atomic incarnation (best
> to start with F22, as we had to make an incompatible change,
> ironically). This allows seamless "atomic" change between current,
> updated, or earlier releases.
>
> Right now, this is focused specifically on a narrow use case: running a
> server where your application runs in a container (with Docker and
> Kubernetes). However, the basic rpm-ostree technology that's used for
> Atomic updates could be used for other situations as well.
Thanx Mat.
Will check it out.

Cheers,

JD