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add concrete store examples, reword note on file system

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Valentin Gagarin 2022-04-28 01:15:27 +02:00
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doc/manual/src/architecture/store/store.md
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@ -4,11 +4,18 @@ A Nix store is a collection of [store objects](objects.md) and associated operat
These store objects can hold arbitrary data, and Nix makes no distinction if they are used as build inputs, build results, or build plans. These store objects can hold arbitrary data, and Nix makes no distinction if they are used as build inputs, build results, or build plans.
Store objects are accessible in a file system through [store paths](paths.md). A Nix store allows to add and retrieve store objects.
Every store has a *store directory*, which contains that store’s objects and is a prefix of their store paths. It can perform builds, that is, transform build inputs using instructions from the build plans into build outputs.
It defaults to `/nix/store`, but is in principle arbitrary. It also keeps track of *references* between data and can therefore garbage-collect unused store objects.
A Nix store can perform builds, that is, transform build inputs using instructions from the build plans into build outputs. It also keeps track of *references* between data and can therefore garbage-collect unused store objects. There exist different types of stores, which all follow this model.
Examples:
- store on the local file system
- remote store accessible via SSH
- binary cache store accessible via HTTP
Every store with a file system representation has a *store directory*, which contains that store’s objects accessible through [store paths](paths.md).
The store directory defaults to `/nix/store`, but is in principle arbitrary.
## A Rosetta stone for the Nix store. ## A Rosetta stone for the Nix store.