Hi,

Yes this is a known issue -- an mtime can be in the future, and an
rctime won't go backwards. There was an earlier attempt to allow
fixing the rctimes but this got stuck and needs effort to bring it up
to date: https://github.com/ceph/ceph/pull/37938

Cheers, dan

On Sun, Dec 18, 2022 at 12:23 PM Stolte, Felix <f.sto...@fz-juelich.de> wrote:
>
> Hi guys,
>
> i want to use ceph.dir.rctime for backup purposes. Unfortunately there are 
> some files in our filesystem which have a ctime of years in the future. This 
> is reflected correctly by ceph.dir.rctime. I changed the the time of this 
> files to now (just did a touch on the file), but rctime stays the same. I 
> waited one day and remounted the filesytem, but the value of rctime stays the 
> same.
>
> It is possible to update the ceph.dir.rctime in some way or is it hard coded, 
> that rctime will never be decreased?
>
> Regards
> Felix
>
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