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add note to docs about overlay + btrfs 

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)
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Jessica Frazelle 2014-12-08 10:18:17 -08:00 committed by Tibor Vass
parent 41d3d7dc72
commit e6d8a17cf5
1 changed files with 4 additions and 1 deletions
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docs/sources/reference/commandline/cli.md
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@ -180,7 +180,10 @@ share executable memory between devices. Use `docker -d -s btrfs -g /mnt/btrfs_p
The `overlay` is a very fast union filesystem. It is now merged in the main
Linux kernel as of [3.18.0](https://lkml.org/lkml/2014/10/26/137).
Call `docker -d -s overlay` to use it.
Call `docker -d -s overlay` to use it.
> **Note:**
> It is currently unsupported on `btrfs` or any Copy on Write filesystem
> and should only be used over `ext4` partitions.
#### Storage driver options