Hi Luís, Am 18.08.2021 um 19:02 schrieb Luis Henriques: > Sebastian Knust <sknust@xxxxxxxxxxxxxxxxxxxxxxx> writes: > >> Hi, >> >> I am running a Ceph Oc,topus (15.2.13) cluster mainly for CephFS. Moving (with >> mv) a large directory (mail server backup, so a few million small files) within >> the cluster takes multiple days, even though both source and destination share >> the same (default) file layout and - at least on the client I am performing the >> move on - are located within the same mount point. >> >> I also see that the move is done by recursive copying and later deletion, as I >> would only expect between different file systems / mount points. > > A reason for that to happen could be the usage of quotas in the > filesystem. If you have quotas set in any of the source or destination > hierarchies the rename(2) syscall will fail with -EXDEV (the "Invalid > cross-device link" error). And I guess that 'mv' will then revert to > the less efficient recursive copy. > > A possible solution would be to temporarily remove the quotas > (i.e. setting them to '0'), and setting them back after the rename. > > Cheers, That's it! Setting quota temporarily to 0 allows for immediate move by rename. Thanks a lot. Cheers Sebastian _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |