Re: deltarpm usefulness?

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On Sat, 2021-11-06 at 23:46 +0100, Marius Schwarz wrote:
> Am 11.08.21 um 22:03 schrieb Marek Marczykowski-Górecki:
> > - there is also argument that people's connection bandwidth
> > nowadays
> >     tends to be fast enough to make the package rebuilding actually
> >     slower than downloading the whole package (but that really vary
> > between
> >     different installations)
> 
> Since we now have Linux on smartphonesd, i heavily disagree with this
> assumption and advocate to expand the drpm usage.
I'm afraid that in its current implementation deltarpm is simply not
very efficient, I usually see <5% saved when doing updates on my Fedora
laptop. I would not expect this to differ too much from a a Fedora
running on eq. PinePhone or other mobile device.

What could work well already is using ostree or ostree based Fedora
distro on a phone - that has efficient delta-based updates built in
and used by default. So using say Silverblue/Kinoite or similar on a
phone could be much more efficient than using deltarpm + you get
additional benefits of being able to roll back at any time, which could
be useful on such a new Fedora platform.

Also flatpaks are ostree based & should get the same delta download and
de-duplication benefits automatically. So using as many flatpaks as
possible on a Fedora running mobile phone could also help quite a bit.

> 
> best regards,
> Marius Schwarz
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