Re: gross DNF bandwidth inefficiency if filesystem space limited

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Dne 3.8.2015 v 17:45 Kevin Fenzi napsal(a):
> On Mon, 3 Aug 2015 17:29:30 +0200
> Vít Ondruch <vondruch@xxxxxxxxxx> wrote:
>
>> This is actually not true. 
> Well, as I noted in my reply, I wasn't actually sure what was being
> proposed here. 
>
>> The repodata should contain just the latest
>> version, but if I have slightly older version of metadata already
>> downloaded, I would be probably fine with installation of slightly
>> older version of package.
> So, you are proposing we do things exactly as we are now, but also keep
> around all previous copies of the packages in the repos (but not in the
> repodata)? 

Keep the previous copies for some period of time, e.g. for one week.

>
> I'm not sure if that setup would work with dnf. I think it requires
> whatever mirror(s) it uses to match the metadata. If you have a older
> metadata and the mirror you hit has been updated, I think dnf will say
> that the repodata doesn't match and try another. 

I don't think so. At leas I interpret Richard's comment [1] differently.
I think that Gnome Software (DNF) fetches the metadata once a day, then
during that day, update is executed, based on the metadata got earlier.
Unfortunately, during period between fetching of metadata and the actual
update, the packages might not be available anymore, since the
repository content changed.


Vít



[1] https://lists.fedoraproject.org/pipermail/devel/2015-July/212998.html

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