DNF: why does it refresh metadata all the time

Reindl Harald h.reindl at thelounge.net
Fri Jun 20 10:19:35 UTC 2014



Am 20.06.2014 11:57, schrieb Mat Booth:
> On 20 June 2014 10:19, Reindl Harald <h.reindl at thelounge.net <mailto:h.reindl at thelounge.net>> wrote:
> 
>     Am 20.06.2014 08:55, schrieb drago01:
>     > On Thu, Jun 19, 2014 at 8:59 PM, Jared K. Smith
>     > <jsmith at fedoraproject.org <mailto:jsmith at fedoraproject.org>> wrote:
>     >> On Thu, Jun 19, 2014 at 2:01 PM, Reindl Harald <h.reindl at thelounge.net <mailto:h.reindl at thelounge.net>>
>     >> wrote:
>     >> Whether you like it or not, one of the most common complaints about yum
>     >> (especially from people coming from another package management system) is
>     >> that it seems slow because of the necessity to download the metadata.  The
>     >> DNF developers -- in trying to address this common complaint -- had solved
>     >> it by handling metadata in a different way.  They've also added settings so
>     >> that power users like you and I can tune it to better fit our particular
>     >> needs.
>     >>
>     >>> and *no* traffic is not cheap everywhere, by far not
>     >>
>     >> I probably understand this better than a lot of people on this list, as I've
>     >> been on a bandwidth-limited connection for the past nine years.  Only in the
>     >> past month have I been able to get high speed internet in my home that
>     >> wasn't limited to a few gigabytes per month.  So yes, I completely
>     >> understand that traffic isn't cheap (or fast) everywhere.
>     >
>     > It should be at least smart enough to not do it on mobile broadband
>     > (like packagekit does)
> 
>     how should it do that?
> 
>     it's imagination that any software knows anything about the internet connection
>     even 11 years ago with a 56k modem that access was shared for my LAN and so
>     the only thing the notebook knew about the inernet was "appears to be slow"
> 
> 
> IIRC, NetworkManager's DBus API should be able to give you that information

from where should it get that information if your network connection is
a Gigabit-Ethernet LAN to the router with a slow DSL upstream?

your whole machine has no idea about your WAN connection

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