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zardoz 2014-07-08 12:26:59 +00:00 • committed by admin
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[[!comment format=mdwn
username="zardoz"
ip="134.147.14.84"
subject="comment 5"
date="2014-07-08T12:26:58Z"
content="""
Something to keep in mind for some point in the future: btrfs supports an efficient method by which one can inquire exactly which files have changed since a specified point in time, where the point in time is measured by a unit called «generation».
A program can request the current «generation» index, and later ask btrfs which files have changed after that index, without needing to walk the file-system. This is currently implemented in the user-space program «btrfs filesystem find-new». While it’s called «find-new», this not only find newly created files, but also changed files.
Currently, it seems one needs to be super-user to use «find-new», because it lists changed files for complete subvolumes, but since generations are stored per-file, in the future there will likely be a user-space method for regular users.
"""]]