Subject: Re: Two RAID1 mirrors are faster than three
From: Anders Karlsson <anders@trudheim.com>
To: Paul P Komkoff Jr <i@stingr.net>
Cc: LKML <linux-kernel@vger.kernel.org>
In-Reply-To: <20030512054130.GA1318@stingr.net>
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Date: 12 May 2003 08:23:15 +0100
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On Mon, 2003-05-12 at 06:41, Paul P Komkoff Jr wrote:

> Replying to Anders Karlsson:
> > downtime on it. You then quiesce the database, split off the second cop=
y
> > from the mirror, mount that as a separate filesystem and back that up
> > while the original with its first copy has already stepped back into
> > full use.
>=20
> Why do not use snapshots for this?

Snapshots was not around then. AFAIK snapshotting in the LVM is a recent
thing. I know people were doing backups by splitting off the 2nd copy in
a mirror some eight years ago.

/Anders

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