dustymabe added a new comment to an issue you are following:
The main reason given for keeping "two partitions" by
default with docker-storage-setup is so that users can easily switch back to devicemapper
if there are critical issues with OverlayFS.
I would like to also point out that one other benefit would be to prevent containers from
cannibalizing your root partition.
However, there is currently no tool which actually allows users to switch back to
devicemapper without repartitioning.
IMHO in the world of container registries and such I would be less worried about the
content that exists on the machine (container images, containers etc). If there are two
LVs (and thus two partitions) one can choose DM or overlay2. If they want to switch
between the two, blow away the one that exists and start over. If you want to keep your
containers, store them somewhere else temporarily.
Therefore, the reason given for maintaining two partitions as the default is invalid.
If that reason is invalid, we should again consider making "one big partition"
the default for Overlay2 installations.
I prefer overlay2 and would like to see there be only one option so that we can have less
confusion in the future. However, giving users the choice is nice as well. Maybe there is
a way to achieve both on startup.
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