Jörg ThalheimandThéophane Hufschmitt
f20d3726dd
tl;dr: With this 1 line change I was able to get a speedup of 1.5x on 1Gbit/s wan connections by enabling zstd compression in nginx. Also nix already supported all common compression format for http transfer, webservers usually only enable them if they are advertised through the Accept-Encoding header. This pull requests makes nix advertises content compression support for zstd, br, gzip and deflate. It's particular useful to add transparent compression for binary caches that serve packages from the host nix store in particular nix-serve, nix-serve-ng and harmonia. I tried so far gzip, brotli and zstd, whereas only zstd was able to bring me performance improvements for 1Gbit/s WAN connections. The following nginx configuration was used in combination with the [zstd module](https://github.com/tokers/zstd-nginx-module) and [harmonia](https://github.com/nix-community/harmonia/) ```nix { services.nginx.virtualHosts."cache.yourhost.com" = { locations."/".extraConfig = '' proxy_pass http://127.0.0.1:5000; proxy_set_header Host $host; proxy_redirect http:// https://; proxy_http_version 1.1; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; zstd on; zstd_types application/x-nix-archive; ''; }; } ``` For testing I unpacked a linux kernel tarball to the nix store using this command `nix-prefetch-url --unpack https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.1.8.tar.gz`. Before: ```console $ nix build && rm -rf /tmp/hello && time ./result/bin/nix copy --no-check-sigs --from https://cache.thalheim.io --to 'file:///tmp/hello?compression=none' '/nix/store/j42mahch5f0jvfmayhzwbb88sw36fvah-linux-6.1.8.tar.gz' warning: Git tree '/scratch/joerg/nix' is dirty real 0m18,375s user 0m2,889s sys 0m1,558s ``` After: ```console $ nix build && rm -rf /tmp/hello && time ./result/bin/nix copy --no-check-sigs --from https://cache.thalheim.io --to 'file:///tmp/hello?compression=none' '/nix/store/j42mahch5f0jvfmayhzwb b88sw36fvah-linux-6.1.8.tar.gz' real 0m11,884s user 0m4,130s sys 0m1,439s ``` Signed-off-by: Jörg Thalheim <joerg@thalheim.io> Update src/libstore/filetransfer.cc Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation
On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):
$ curl -L https://nixos.org/nix/install | sh
Information on additional installation methods is available on the Nix download page.
Building And Developing
See our Hacking guide in our manual for instruction on how to build nix from source with nix-build or how to get a development environment.
Additional Resources
- Nix manual
- Nix jobsets on hydra.nixos.org
- NixOS Discourse
- Matrix - #nix:nixos.org
- IRC - #nixos on libera.chat
License
Nix is released under the LGPL v2.1.