Re: Question on difference between dnf upgrade versus clean install?

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On 2020-05-29 01:58, Michael D. Setzer II via users wrote:
> I've got 5 Fedora machines at my house. Recently 
> upgraded a couple since FC30 was becoming EOL.
>
> Some I did a clean install. New Hard disk, and install 
> from iso. Usually, that takes about 1/2 hour for whole 
> process. Including install of OS, and then install of a 
> number of other packages I use that are not installed by 
> default.
>
> Did update on my notebook machine as well using dnf 
> system update. This system has some more packages 
> installed. Showed 5070 versus about 2000+ for the 
> clean install. Download process took about 30 minutes, 
> but then the reboot and upgrade process took just over 
> 14 hours. Total was 14 hours 50 minutes. 
>
> Not clear why it would take 15 times as long? Checked 
> while running, and dnf was running at 100%, but just 
> using 1 cpu. Notebook has dual cpus. Don't know if 
> others just run it, and check when done, but seems to 
> be a bigger difference in time than it should be.

I do not know why your upgrade would have taken so long.  I just upgraded an
F30 VM to F32.  It is a pretty vanilla Workstation install.  The VM's disks are actually
hosted on a NAS over nfs and are traditional spinning HW.

I upgraded via "dnf system-upgrade".  The number of packages upgraded was 1656.
The download phase took 9 minutes 10 seconds.  The upgrade phase took a few ticks
over 25 minutes.

I would think that checking

dnf system-upgrade log

and seeing if one area in particular was responsible for the excessive time may be
helpful.

Another recent upgrade of an old notebook from F31->F32, Core2 Duo CPU, with 2626
packages upgraded took 58 minutes.  That notebook does have an SSD.

-- 
The key to getting good answers is to ask good questions.
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