On Dec 14, 2014 10:12 PM, "Kevin Kofler" <kevin.kofler(a)chello.at> wrote:
Sudhir Khanger wrote:
> Most decision are being made on two assumptions 1. people have fast and
> unlimited internet connections and 2. people have high RAM and multiple
> core CPU powerful computers. Both of these assumptions are arbitrarily
at
> best. DNF regularly downloads cache, disables delta RPM
support,
It's actually ENABLING DeltaRPM support (as the latest DNF update now
does)
that makes assumption 2. DeltaRPMs reduce download bandwidth
consumption
at
the expense of a lot of CPU power. It's a tradeoff between 1. and
2. If
you
have 1. more than 2. (as is the case for me), then DeltaRPMs actually
make
your updates slower. If you have 2. more than 1., they make your updates
faster.
I don't know why the time to rebuild rpms is important, updates are now
applied at boot time, so rpms can be rebuilt with smaller nice/ionice
before the user reboots (on Workstation product). Meanwhile bandwidth cost
money.