Filesystems and case-insensitivity

Filesystems and case-insensitivity

Example for ZFS:

    % zfs get all rpool/ROOT/default
    NAME                PROPERTY              VALUE                  SOURCE
    rpool/ROOT/default  type                  filesystem             -
    rpool/ROOT/default  creation              Sun Jun 12 10:46 2016  -
    …
    rpool/ROOT/default  utf8only              on                     -
    rpool/ROOT/default  normalization         formD                  -
    rpool/ROOT/default  casesensitivity       sensitive              -
    …

Case sensitivity is selectable. You can force it to only store valid UTF-8, and you can choose whether the UTF-8 is normalised or not. Or you can allow it to store anything. This gives you full backward compatibility with historical UNIX behaviour should you want it, or you can restrict it case sensitive normalised UTF-8. Having this selectable on a per-filesystem basis gives you a great deal of flexibility, and it defaults to something sensible (the above are the defaults).