$ sudo xfs_db -c frag -r /dev/mapper/centos-root actual 49226, ideal 48729, fragmentation factor 1.01% Note, this number is largely meaningless. Files on this filesystem average 1.01 extents per file
$ sudo xfs_fsr
e4defrag -c /dev/mapper/centos-root
e4defrag /dev/mapper/centos-root