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Adding Quota option for ZFS (#1135) 

* Adding Quota option

Try to explain how you can use quota on ZFS as it was implemented/discussed in #3804.

* Requested changes from @johndmulhausen
This commit is contained in:
Andreas Steinel 2017-01-25 00:41:52 +01:00 committed by John Mulhausen
parent bb81ccb937
commit 781a582fff
1 changed files with 12 additions and 0 deletions
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engine/userguide/storagedriver/zfs-driver.md
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@ -320,3 +320,15 @@ performance. This is because they bypass the storage driver and do not incur
any of the potential overheads introduced by thin provisioning and any of the potential overheads introduced by thin provisioning and
copy-on-write. For this reason, you should place heavy write workloads on data copy-on-write. For this reason, you should place heavy write workloads on data
volumes. volumes.
## Limiting your container's writable storage quota
If you want to use quota on a per docker image/zfs dataset basis, you can use
the `--storage-opt` option:
--storage-opt size=256M
which limits the space your container can write/change (implemented with the
ZFS attribute `available`). This means that if you have e.g. a database docker
image of 256 MB and you use the aforementioned option, you end up with a
container of size 512 MB and 256 MB free.