reasonably uniform, but not cryptographically strong,
hashing of the filename. (default)
.TP
-.B space
-This can only be set on plain directory default striping.
-Newly created sub-directories will be distributed on all
-MDTs by MDT space usage. Note that this is suggested to
-be set on lustre ROOT, so that all sub-directories under
-lustre ROOT are distributed among all MDTs.
-.TP
.B all_char
Sum of ASCII characters modulo number of MDTs. This
provides weak hashing of the filename, and is suitable