> On 20 May 2021, at 15:18, Eirik Rye <r...@trojka.no> wrote:
>
> I assume there are some sparseness or block size related shenanigans going on
> here instead, causing differences in reported physical usage by `du` (syscall
> `newfstatat()`) compared to `ls` (syscall `lstat()`) and dovecot.
>
> The filesystem quota system in Linux, which is what we're migrating from,
> apparently uses the same calculation method as `du`, which adds to the
> confusion.
Oh, a lot of messages in these folders appear to be hardlinks to the same
inodes (duplicates). Dovecot's vsize-calculation doesn't care that messages are
referencing the same inodes, but `du` and Linux' quota calculation obviously
does.
That explains everything, then. Apologies again for the bother.
- Eirik
