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From: Martin Steigerwald <martin@lichtvoll.de>
To: Christoph Anton Mitterer <calestyo@scientia.net>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: how to clone a btrfs filesystem
Date: Sat, 18 Apr 2015 10:10:40 +0200
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Am Samstag, 18. April 2015, 01:08:44 schrieb Christoph Anton Mitterer:
> Hey.

Hi Christoph,

> I've seen that this has been asked some times before, and there are
> stackoverflow/etc. questions on that, but none with a really good
> answer.
>=20
> How can I best copy one btrfs filesystem (with snapshots and subvolum=
es)
> into another, especially with keeping the CoW/reflink status of all
> files?
> And ideally incrementally upgrade it later (again with all
> snapshots/subvols, and again not loosing the shared blocks between th=
ese
> files).
>=20
> send/receive apparently also works for just one subvolume,... and
> documentation is quite sparse :-/

To make it short and simple:

I am not aware of any out of the box solution for this use case.

And I think that is just why you didn=B4t found any.

I want to buy a new backup harddisk sometime in the future, and ideally=
=20
transfer the contents of the current one with all subvolumes and=20
snapshots, but I think except for some old backups that I have only the=
re=20
and I do not have the sources anymore, I will just start from scratch a=
nd=20
let it collect its own snapshots.

That said, I think it can be scripted. But I am not aware of anyone hav=
ing=20
done this. I may be missing something, so maybe someone on the list has=
 a=20
recommendation.

Ciao,
=2D-=20
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
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