Some of ZFS ACLs doesn't work as expected

[Pavel Bychykhin]

19.08.2012 19:40, Edward Tomasz Napierała пишет:
> Wiadomość napisana przez Pavel Bychykhin w dniu 18 sie 2012, o godz. 19:48:
>> Dear community!
>>
>> After my experiments with ZFS, I concluded, that permissions "delete_child" and "delete" are ignored.
>> For the create/update/delete operation a list of "rwxp" (read_data/write_data/execute/append_data) is fully sufficient.
>
> They are not ignored, but yes, write access on a directory is enough to delete a file.
>
>> No need to specify the "delete_child" and "delete" permissions at all, or I don't understand something?
>
> Unless you need them - no, you don't.  That's why these bits are not set in a default
> case (so called 'trivial ACL', i.e. no ACL set on a file).
>

Could you please provide an example of at least one practical situation, 
where the "delete_child" and "delete" permissions would be useful?

-- 
Best regards,
Pavel