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| zatm8 | Does anyone here tries to build Content Addressed binary cache? There was some experimental nixos cache, but it seems to be long dead. I would like to know current status of adopting Ca-derivations. | 19:30:21 |
 ajs124 | You mean https://github.com/zhaofengli/attic? | 19:34:29 |
| zatm8 | No, it's nix daemon feature rather then cache: https://nixos.wiki/wiki/Ca-derivations | 19:37:16 |
| zatm8 | I’ve been experimenting with integrating OTA updates with Nix’s local-overlay-store. The lower layer is the active A/B slot (a SquashFS image containing /nix/store), and the upper layer is a writable ext4 store used by containers. After a slot switch, a reconcile pass repairs the upper layer by downloading missing store paths. While working on this, I found that the same input-addressed store path can have different realisations on different hosts, so the narHash recorded in the lower-store DB could disagree with the bytes shipped in the image, causing nix copy to fail with a hash mismatch. CA-derivations fixed this class of issues for me, but I really don't know how many people using them and what's the status of this feature. | 19:51:44 |
| zatm8 | * No, it's nix daemon feature rather than cache: https://nixos.wiki/wiki/Ca-derivations | 19:59:14 |
