Originally Posted by MartyByrde
(APFS replication utility is ASR, I believe).

When in doubt, go to the horse's mouth (in Terminal ~ % man asr ) and you get...

Originally Posted by BSD System Manager's Manual
ASR(8) BSD System Manager's Manual ASR(8)

NAME
asr -- Apple Software Restore; copy volumes (e.g. from disk images)

SYNOPSIS
asr verb [options]
asr restore[exact] --source source --target target [options]
asr server --source source --config configuration [options]
asr restore --source asr://source --file file [options]
asr imagescan --source image [options]
asr help | version

DESCRIPTION
asr efficiently copies disk images onto volumes, either directly or via a
multicast network stream. asr can also accurately clone volumes without
the use of an intermediate disk image.

In its first form, asr copies source (usually a disk image, potentially
on an HTTP server) to target. source can be specified using a path in
the filesystem, or an http or https URL. It can also be an asr:// URL to
indicate a multicast source. asr can also be invoked with its second
form to act as a multicast server. In its third form, asr will restore a
multicast disk image to a file instead of disk volume. In its fourth
form, asr prepares a disk image to be restored efficiently, adding whole-
volume checksum information. help and version provide usage and version
information, respectively.

<snip>


If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein