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Merge pull request #9282 from SvenDowideit/explain-VIRTUAL-SIZE

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Explain what the VIRTUAL SIZE means
Upstream-commit: ff327f9d576fea42713e88a6a50ef2a3f47d219f
Component: engine
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Sven Dowideit
2014-11-27 12:19:09 +10:00
parent a849101a28 1d30429df6
commit 8ca77e6e26
1 changed files with 4 additions and 0 deletions
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components/engine/docs/sources/reference/commandline/cli.md
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@ -796,6 +796,10 @@ decrease disk usage, and speed up `docker build` by
allowing each step to be cached. These intermediate layers are not shown
by default.
The `VIRTUAL SIZE` is the cumulative space taken up by the image and all
its parent images. This is also the disk space used by the contents of the
Tar file created when you `docker save` an image.
An image will be listed more than once if it has multiple repository names
or tags. This single image (identifiable by its matching `IMAGE ID`)
uses up the `VIRTUAL SIZE` listed only once.