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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
committed by Tibor Vass
parent 0a6f1be9ce
commit 28a1369b30
1 changed files with 7 additions and 5 deletions
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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 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 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 some serious kernel crashes. However, `aufs` allows containers to share
that allows containers to share executable and shared library memory, so is a executable and shared library memory, so is a useful choice when running
useful choice when running thousands of containers with the same program or thousands of containers with the same program or libraries.
libraries.
The `devicemapper` driver uses thin provisioning and Copy on Write (CoW) The `devicemapper` driver uses thin provisioning and Copy on Write (CoW)
snapshots. For each devicemapper graph location – typically 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). 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 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. `dockerd -s overlay` to use it.
> **Note:** > **Note:**