Tonight we enabled Bucket Versioning and configured a Lifecycle Rule to delete the non-default object version after 30 days. See enable bucket versioning · NixOS/infra@9cf1919 · GitHub for details.
Then we deleted everything contained in the following datasets. This should amount to roughly 100 TiB, so something like 10% of the total S3 size.
- datasets/narinfos-nixos-images-2026-01-06T01-13Z.parquet · brianmcgee/nix-cache-dataset at main
- datasets/narinfos-nixos-images-dangling-refs-2026-01-06T01-13Z.parquet · brianmcgee/nix-cache-dataset at main
The result is that the default version served by cache.nixos.org will return a HTTP 404 response. The non-default version is still around and can be restored within the next 30 days should the deletion cause severe issues.
The data will automatically be removed after 2026-03-21.
We thank @brianmcgee for making this happen!