docker-for-mac: add a FAQ about reducing the qcow2 size #1100
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In Docker for Mac 1.12 the only way to free space on the host is to delete the qcow2 which means all containers and images have to be rebuilt. In Docker for Mac 1.13 there is preliminary support for shrinking the qcow2 file non-destructively using "TRIM" (as also used on SSDs). Unfortunately this isn't (yet) fully automatic -- it runs in the background and requires the app to be occasionally restarted. Related to [docker/for-mac#371] Signed-off-by: David Scott <dave.scott@docker.com>
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/cc @londoncalling -- what do you think? |
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@djs55 looks good, I will get this in today, along with updates for the Beta's release notes. I might go ahead and add a link to the issue within the FAQ if that's okay. |
Signed-off-by: Victoria Bialas <victoria.bialas@docker.com>
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LGTM, merging! |
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Proposed changes
Add a FAQ about reducing the size of the qcow2 on Docker for Mac.
In Docker for Mac 1.12 the only way to free space on the host is to delete the qcow2 which means all containers and images have to be rebuilt.
In Docker for Mac 1.13 there is preliminary support for shrinking the qcow2 file non-destructively using "TRIM" (as also used on SSDs). Unfortunately this isn't (yet) fully automatic -- it runs in the background and requires the app to be occasionally restarted.
In future versions I'm hoping to make this happen automatically in the background.
Related issues
See [docker/for-mac#371]