[CentOS] Any downside to mount -o noatime?

Fri Feb 11 02:29:31 UTC 2022
Kenneth Porter <shiva at sewingwitch.com>

--On Thursday, February 10, 2022 8:15 PM -0600 Chris Adams 
<linux at cmadams.net> wrote:

> Unless you never write to the disk, that will still be lost in the noise
> of writes.

Consider a weekly backup of /usr with checksumming of the contents. A 
partition that only changes with updates, so in principle it could be 
mounted read-only except when I yum update. Although of course since it's 
not SUPPOSED to change, an incremental backup should only be done after 
that yum update. The main value I can see with atime on /usr is to identify 
trash that I'm not using and that should be uninstalled.

> But if it still bothers you, use rsync --open-noatime.

That would be handy if I actually needed atime! I hadn't noticed that one. 
Although I'm reading that the containing directory's atime does get updated.