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add warning re: changing value of dm.basesize.

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Signed-off-by: Marc Tamsky <mtamsky@gmail.com> (github: tamsky)
Upstream-commit: bd30746e07e18942cea4f2d15a45fd357c957e4f
Component: engine
This commit is contained in:
Marc Tamsky
2014-08-05 19:28:07 -07:00
parent 4e14138bbc
commit a062aab14b
1 changed files with 5 additions and 1 deletions
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6
components/engine/daemon/graphdriver/devmapper/README.md
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@ -43,7 +43,11 @@ Here is the list of supported options:
10G. Note, thin devices are inherently "sparse", so a 10G device
which is mostly empty doesn't use 10 GB of space on the
pool. However, the filesystem will use more space for the empty
case the larger the device is.
case the larger the device is. **Warning**: This value affects the
system-wide "base" empty filesystem that may already be
initialized and inherited by pulled images. Typically, a change
to this value will require additional steps to take effect: 1)
stop `docker -d`, 2) `rm -rf /var/lib/docker`, 3) start `docker -d`.
Example use: