Hardlinks are not handled and causes errors on the destination files:
source:
/a/b hardlinked to /a/c
dsync /a /target

[2020-10-31T05:44:52] [39] [/path/src/common/mfu_flist_copy.c:330] ERROR: Failed to change ownership on /target/c' lchown() (errno=2 No such file or directory) [2020-10-31T05:44:52] [39] [/path/src/common/mfu_flist_copy.c:356] ERROR: Failed to change permissions on /target/c' chmod() (errno=2 No such file or directory)
And one more for utime

And /target/b and /target/c ends up as separate files, sometimes with one of them (c in the above case) having incorrect timestamps.

Currently running mpifileutils 0.10.1