systems. If it is selected but not supported, the

<application>pg_upgrade</application> run will error. At present, it

is supported on Linux (kernel 4.5 or later) with Btrfs and XFS (on

file systems created with reflink support, which is not the default

for XFS at this writing), and on macOS with APFS.

file systems created with reflink support), and on macOS with APFS.

</para>

</listitem>

</varlistentry>