On 11/8/21 5:02 AM, Fabio Valentini wrote: > On Sat, Nov 6, 2021 at 11:47 PM Marius Schwarz <fedora...@cloud-foo.de> 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. > > How would you suggest to do that? > > From what I can tell, drpms are most useful if you update your system > daily (because deltas are only kept from one compose, and need storage > space) - but unless you have thousands of packages installed, the few > hundred KB - a few MB of download savings you get from drpms every day > (at most) are drowned out by the size of the daily repository metadata > download to even get those drpms. And if you update less often to > reduce the frequency with which you need to download the big repo > metadata, you might not get drpms for any updates at all. > > So I don't think that there's *any* scenario where using drpms results > in a net reduction in MBs that need to be downloaded over time, > because either > - failed drpm reconstructions cause whole packages to be redownloaded anyway, > - very few packages have drpms in every update push, > - drpms are only kept for a very limited amount of time and limited > number of packages, > - savings from drpm usage is on the order of at most a few MB per > update per day, and less if not updating every day, but > - repository metadata downloads are reaching ~100MB / day, depending > on how many repos are enabled. > > So ... am I missing something, or do drpms actually make things worse > in *every* respect right now? > - more MBs downloaded per update / per day in every scenario I can think of, > - more computationally intensive to reconstruct locally, > - needs compute time and storage space in Fedora build system, > - makes compose process more complicated. > > Fabio
I don’t think you are missing anything. Sincerely, Demi Marie Obenour
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