On 2020-05-23 23:47, backu...@kosowsky.org wrote:
Regarding your comment:
 However, I don't think it makes sense to
"fix" it, since a backup shouldn't add metadata that changes each time you
backup some data that hasn't changed.

Actually, the whole point of --ignore-dir-times is that the dir mod
time is not changed each time you rsync.

Behavior is as follows:
1. When created, the mod time is set to 'rsync' run time
2. This mod time is *not* changed on subsequent 'rsyncs' unless a
   change to the directory contents occurs in which case the
   directory timestamp is updated to the *current* time

Indeed, one reason to use --ignore-dir-times is to avoid changing the
mod time every time the directory mod time changes.

This is different from the absence of --times that changes the mod time of
files/links/devices to the current time on every rsync since the files
show up as changed (unless you also use --ignore-times)

This behavior can be verified by using rsync.
Also, it can be gleaned from the following pulled from the man pages:

--ignore-dir-times and --omit-dir-times are two different options


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