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Fix aufs docs

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Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
This commit is contained in:
Qiang Huang 2016-07-15 13:57:38 +08:00
parent 9df2a825ba
commit 92dfbc1e2d
1 changed files with 7 additions and 5 deletions
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12
docs/reference/commandline/dockerd.md
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@ -210,10 +210,9 @@ drivers: `aufs`, `devicemapper`, `btrfs`, `zfs`, `overlay` and `overlay2`.
The `aufs` driver is the oldest, but is based on a Linux kernel patch-set that
is unlikely to be merged into the main kernel. These are also known to cause
some serious kernel crashes. However, `aufs` is also the only storage driver
that allows containers to share executable and shared library memory, so is a
useful choice when running thousands of containers with the same program or
libraries.
some serious kernel crashes. However, `aufs` allows containers to share
executable and shared library memory, so is a useful choice when running
thousands of containers with the same program or libraries.
The `devicemapper` driver uses thin provisioning and Copy on Write (CoW)
snapshots. For each devicemapper graph location – typically
@ -235,7 +234,10 @@ cached only once. Use `dockerd -s zfs`. To select a different zfs filesystem
set `zfs.fsname` option as described in [Storage driver options](#storage-driver-options).
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
Linux kernel as of [3.18.0](https://lkml.org/lkml/2014/10/26/137). `overlay`
also supports page cache sharing, this means multiple containers accessing
the same file can share a single page cache entry (or entries), it makes
`overlay` as efficient with memory as `aufs` driver. Call
`dockerd -s overlay` to use it.
> **Note:**