[CentOS] Re: du, df (other tools?) way of reporting file/system sizes

There is GlusterFS involved here in my setup. That qcow2, but all in general, was created on fuse-mounted gluster volume - how that fact plays into this, it should not at all, unless there are issues/bugs in Gluster. One thing I wonder about - when go loose with speculations - how mounting gluster volume might affect this, might result in such "misalignment" I'm experiencing glusterfs errors depending on how I mount gluster volume(replica) and like with du/df, one box/peer - in three peer gluster cluster - which is error-free, is the box which reports sizes with sparses counted in.