Em junho 5, 2020 16:58 Eli Schwartz escreveu:
If Arch Linux were to add repositories containing split debug packages for all our x86_64 packages, this would obviously add a fair amount of space to the mirror requirements. It could possibly double or triple the size taken by non-data packages. I don't have real-world numbers for how much space it would take up, but I do have some comparisons.
For my custom repo as a sample, which I do upload debug packages for, I am using 2.9Gi of space, and 1.7Gi comes from debug packages.
On the other side of things, our biggest 2 official packages are cuda, 4137.96 MiB of proprietary blobs that aren't currently stripped and therefore even if we did split it into a debug package it wouldn't increase space usage at all, and kicad-library-3d, 5171.97 MiB of pure data in /usr/share, which is not eligible for debug packages anyway.
A naive list of packages which would probably generate debug packages:
$ expac -H M '%m %n %a' | grep -v 'any$' | sort --human-numeric-sort [...] 1109.50 MiB emscripten x86_64 1136.27 MiB python-tensorflow x86_64 1145.23 MiB python-tensorflow-opt x86_64 1286.69 MiB python-pytorch-cuda x86_64 1289.44 MiB python-pytorch-opt-cuda x86_64 1518.42 MiB ghc-static x86_64 2589.23 MiB python-tensorflow-cuda x86_64 2597.38 MiB python-tensorflow-opt-cuda x86_64 3757.68 MiB tensorflow-cuda x86_64 3765.75 MiB tensorflow-opt-cuda x86_64 4137.96 MiB cuda x86_64
(Basically all of the really big stuff is tensorflow/cuda/machine learning bits. We could selectively disable debug packages for two PKGBUILDs and avoid all the worst offenders, if we needed to. heh.)
Packages which definitely would not (there's some big, high-profile packages here, and my custom repo doesn't reflect this sort of spread at all):
$ expac -H M '%m %n %a' | grep -v 'any$' | sort --human-numeric-sort [...] 1202.02 MiB texlive-fontsextra any 1307.98 MiB texlive-fontsextra any 2006.67 MiB 0ad-data any 3112.39 MiB nltk-data any 5171.97 MiB kicad-library-3d any
...
Anyway, providing these symbols would be generally desirable for users, and ideally it would work opt-out to make it easier for users to get access to them. It's something we've generally wanted to do, see for example https://bugs.archlinux.org/task/38755 And it's possible we may actually, at long last, get around to implementing this.
So, question to mirror admins: if Arch was to add debug repositories, would you be okay syncing them? And should it be opt-in or opt out?
The answers to these questions will influence the direction I will take in trying to devise a satisfactory resolution to this outstanding infrastructure request. So I would love to get some input from the people who would be affected by such a change.
Hi Eli, Did we even investigate debuginfod? I really don't think we should add -debug packages. I have been taking a look at it, and it couples well with our reproducible effort, since build id's are used to search for symbols on the debuginfod server. Regards, Giancarlo Razzolini