hello,
i'm playing with bcachefs , as it's nice to see that there is another
powerful cow filesystem in development.
i would like to make sure that it is not affected by
https://bugzilla.kernel.org/show_bug.cgi?id=99171 , which is about
drbd/mdraid/btrfs/lvm suffering from raid mirror inconsistencies under
special circumstances when written to using O_DIRECT.
at least i can see that development of bcachefs has focus on O_DIRECT
https://patchwork.kernel.org/project/linux-fsdevel/patch/[email protected]/
one question to make sure that my testing gives reliable result:
does "bcachefs data scrub /fs" scrub both sides of the mirror in
parallel AND while doing that, does it compare, if data blocks on each
device really are the same / have the same checksum , so that we would
see if O_DIRECT writes go wrong , probably reaching only one side of the
mirror ?
root@debian13:~# bcachefs data scrub /bcachefs
Starting scrub on 2 devices: sdb sdc
device checked corrected uncorrected total
sdb 518 MiB 0 B 0 B 518 MiB 100%
complete
sdc 518 MiB 0 B 0 B 518 MiB 100%
complete
Roland
sysadmin
p.s.:
i'm not subscribed to this list, so please keep me CC'd.
