The cloud object stores do not offer support the complete set of of hadoop fs commands. In particular, the commands to create, delete and rename snapshots are all unsupported; the -appendToFile and -truncate likewise unavailable: the objects are immutable, once written.

Unless the filesystem supports permissions and acls as HDFS, some or all of the permissions operations will be unsupported: -chgrp, -chmod, -chown, -getfacl, -getfattr, -setfacl, and -setfattr.

the -setrep command is usually ignored, while the -df command returns a spurious value (8 Exabytes)

bin/hadoop fs -df adl://alice.azuredatalakestore.net/
Filesystem Size Used Available Use%
adl://alice.azuredatalakestore.net 9223372036854775807 0 9223372036854775807 0%