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Merge pull request #24112 from docker/agent/issue-23757

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docs: address issue #23757
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David Karlsson
2026-02-28 05:39:39 +01:00
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parent 8f54d121c3 f208c6c425
commit fb692c3dc2
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2
_vale/config/vocabularies/Docker/accept.txt
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@@ -1,5 +1,7 @@
(?i)[A-Z]{2,}'?s
jq
zstd
Zstandard
untracked
ripgrep
exfiltration

16
content/manuals/build/exporters/_index.md
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@@ -252,6 +252,22 @@ the previous compression algorithm.
> The `gzip` and `estargz` compression methods use the [`compress/gzip` package](https://pkg.go.dev/compress/gzip),
> while `zstd` uses the [`github.com/klauspost/compress/zstd` package](https://github.com/klauspost/compress/tree/master/zstd).
#### zstd compression levels
When you specify `compression=zstd`, the `compression-level` parameter accepts
values from 0 to 22. BuildKit maps these values to four internal compression
levels:
| compression-level | Internal level | Approximate zstd level | Description |
| ----------------- | -------------- | ---------------------- | ------------------------------------- |
| 0-2 | Fastest | ~1 | Fastest compression, larger file size |
| 3-6 (default) | Default | ~3 | Balanced compression and speed |
| 7-8 | Better | ~7 | Better compression, slower |
| 9-22 | Best | ~11 | Best compression, slowest |
For example, setting `compression-level=5` and `compression-level=6` produces
the same compression output, since both map to the "Default" internal level.
### OCI media types
The `image`, `registry`, `oci` and `docker` exporters create container images.