linux-kernel - Re: [dm-devel] Re: ANNOUNCE: mdadm 3.0 - A tool for managing Soft RAID under Linux

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Message-Id: <1244133536.5541.48.camel@o>
Date:	Thu, 04 Jun 2009 18:38:56 +0200
From:	Heinz Mauelshagen <heinzm@...hat.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	device-mapper development <dm-devel@...hat.com>,
	Jeff Garzik <jeff@...zik.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-raid@...r.kernel.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arjan van de Ven <arjan@...radead.org>,
	Ed Ciechanowski <ed.ciechanowski@...el.com>,
	Jacek Danecki <jacek.danecki@...el.com>
Subject: Re: [dm-devel] Re: ANNOUNCE: mdadm 3.0 - A tool for managing Soft 
 RAID under Linux

On Wed, 2009-06-03 at 10:26 -0700, Dan Williams wrote:
> On Wed, Jun 3, 2009 at 7:42 AM, Heinz Mauelshagen <heinzm@...hat.com> wrote:
> > On Wed, 2009-06-03 at 13:56 +1000, Neil Brown wrote:
> >> As for integrating the two code bases.... people have been suggesting
> >> that for years, but I suspect few of them have looked deeply at the
> >> practicalities.  Apparently it was suggested at the recent "storage
> >> summit".  However as the primary md and dm developers were absent, I
> >> have doubts about how truly well-informed that conversation could have
> >> been.
> >
> > Agreed, we'd need face-time and talk issues through in order to come up
> > with any such plan for md+dm integration.
> >
> 
> What are your general impressions of dmraid using md kernel
> infrastructure for raid level support?

At the time of the dmraid project start, we already had libdevmapper
which was suitable to handle in-kernel device manipulation with no
adequate on the MD side so it was the appropriate interface to use.

Cheers,
Heinz

> 
> Thanks,
> Dan

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