From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Mason <chris.mason@oracle.com>
Subject: Re: Notes on support for multiple devices for a single filesystem
Date: Wed, 17 Dec 2008 16:26:24 -0500
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Cc: Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@infradead.org>, adilger@sun.com,
	sfr@canb.auug.org.au, linux-kernel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
To: Kay Sievers <kay.sievers@vrfy.org>
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <ac3eb2510812171320i414d89d4x9840954275774d51@mail.gmail.com>
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On Wed, 2008-12-17 at 22:20 +0100, Kay Sievers wrote:
> On Wed, Dec 17, 2008 at 21:58, Chris Mason <chris.mason@oracle.com> wrote:
> > On Wed, 2008-12-17 at 11:53 -0800, Andrew Morton wrote:
> >
> > There are other bits and pieces like high speed front end caching
> > devices that would be difficult in MD/LVM, but since I don't have that
> > coded yet I suppose they don't really count...
> 
> Features like the very nice and useful directory-based snapshots would
> also not be possible with simple block-based multi-devices, right?

At least for btrfs, the snapshotting is independent from the
multi-device code, and you still get snapshotting on single device
filesystems.

-chris