an idea about upgrades

[Steven Stern]

On 05/12/2015 01:47 PM, jd1008 wrote:
> 
> 
> On 05/12/2015 11:59 AM, Ronal B Morse wrote:
>> On 05/12/2015 11:53 AM, 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).
>>>
>>> Cheers,
>>> JD
>>>
>> JD, I get the idea, but not the mechanics. Are you saying the upgrader
>> should create an image of the system partition (ala clonezilla or
>> partimage) before starting the actual upgrade? Windows sort of does
>> this when you install a new version (and the backup store is a minor
>> pain to delete after a successful upgrade).
>>
>> RBM
>>
> No.
> Since an existing current installation has the rpm database,
> is not possible to save that in a fashion similar to what
> happens when you run fedup (which requires a reboot to
> actually finish up the upgrade).
> 
> So, a downgrade would involve the same process as the upgrade,
> but based on all the rpms saved (i.e. the downgrade would not start
> with the release iso image rpms, but would rather download the
> rpms according the list of rpms saved during fedup).
> 
> The only issue would be the conf files - and those are easy to
> backup and restore by the user prior to doing fedup.
> 
> Cheers,
> 
> JD

The opposite of "fedup"... "UpChuck", perhaps?

-- 
-- Steve