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Hello all.
I'm researching the subject, which is 'on-line de-duplicating' the space
consumed by cached docker images and pushed into a local
private registry on the same host, like using fs with COW (btrfs/zfs?).
There is related bug for TripleO [0].

Could you please share some ideas or perhaps solutions already
implemented somewhere? It seems there is not much info wrt this topic
available on the web.

[0] https://bugs.launchpad.net/bugs/1694709

-- 
Best regards,
Bogdan Dobrelya,
Irc #bogdando