[question] "copy-on-write" in ext4

[Ivan Zorin]

Hello, everybody. I have a question to ext4 filesystem developers. Could 
you tell me please, have you planned to implement (no matter, how soon) 
in ext4 some "copy-on-write" feature? If you have, then how it will be 
looks like (and how soon :-) ?
If you haven't, then did you think about ability to implement such 
feature and how it could be?
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