Hello Chris,
> There is a btrfs ioctl to clone individual files, and this could be used
> to implement an online dedup. But, since it is happening from userland,
> you can't lock out all of the other users of a given file.
> So, the dedup application would be responsible for making sure a given
> file was not being changed while the dedup scan was running.
I see, does that mean that I can not do ,,dedup'' for files that are
currently opened by a userland program?
Thomas
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