docker_practice/underly/ufs.md

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##
[UnionFS](https://en.wikipedia.org/wiki/UnionFS))是一种分层、轻量级并且高性能的文件系统,它支持对文件系统的修改作为一次提交来一层层的叠加,同时可以将不同目录挂载到同一个虚拟文件系统下(unite several directories into a single virtual filesystem)。
Docker
Docker
Docker 使 AUFSAnotherUnionFS `AUFS` Git readonlyreadwritewhiteout-able, `AUFS` , ()
Docker `OverlayFS`, `AUFS`, `Btrfs`, `VFS`, `ZFS` `Device Mapper`
Linux Docker 使
|Linux | Docker 使 |
| :-- | :-- |
|Docker CE on Ubuntu | `overlay2` (16.04 +) |
|Docker CE on Debian | `overlay2` (Debian Stretch), `aufs`, `devicemapper` |
|Docker CE on CentOS | `overlay2` |
|Docker CE on Fedora | `overlay2` |
使 `overlay2` `overlay2` Docker `aufs`使