From: Kevin Corry <corryk@us.ibm.com>
To: Steven Dake <sdake@mvista.com>, Doug Ledford <dledford@redhat.com>
Cc: Joel Becker <Joel.Becker@oracle.com>,
Neil Brown <neilb@cse.unsw.edu.au>,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: RFC - new raid superblock layout for md driver
Date: Thu, 21 Nov 2002 14:35:59 -0600 [thread overview]
Message-ID: <02112114355903.06518@boiler> (raw)
In-Reply-To: <3DDD46E0.9040909@mvista.com>
On Thursday 21 November 2002 14:49, Steven Dake wrote:
> Doug,
>
> Yup this would be ideal and I think this is what EVMS tries to do,
> although I haven't tried it.
This is indeed what EVMS's new design does. It has user-space plugins that
understand a variety of on-disk-metadata formats. There are plugins for LVM
volumes, for MD RAID devices, for partitions, as well as others. The plugins
communicate with the MD driver to activate MD devices, and with the
device-mapper driver to activate other devices.
As for whether DM and MD kernel drivers should be merged: I imagine it could
be done, since DM already has support for easily adding new modules, but I
don't see any overwhelming reason to merge them right now. I'm sure it will
be discussed more when 2.7 comes out. For now they seem to work fine as
separate drivers doing what each specializes in. All the integration issues
that have been brought up can usually be dealt with in user-space.
--
Kevin Corry
corryk@us.ibm.com
http://evms.sourceforge.net/
next prev parent reply other threads:[~2002-11-21 20:35 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-20 4:09 RFC - new raid superblock layout for md driver Neil Brown
2002-11-20 10:03 ` Anton Altaparmakov
2002-11-20 23:02 ` Neil Brown
2002-11-22 0:08 ` Kenneth D. Merry
2002-12-09 3:52 ` Neil Brown
2002-12-09 23:50 ` large await discrepancies Joe Pruett
2002-12-10 15:59 ` Joe Pruett
2002-12-12 15:30 ` Joe Pruett
2002-12-10 6:28 ` RFC - new raid superblock layout for md driver Kenneth D. Merry
2002-12-11 0:07 ` Neil Brown
2002-11-20 13:58 ` Bill Rugolsky Jr.
2002-11-20 23:17 ` Neil Brown
2002-11-20 14:09 ` Alan Cox
2002-11-20 23:11 ` Neil Brown
2002-11-21 0:30 ` Alan Cox
2002-11-21 0:10 ` John Adams
2002-11-21 0:30 ` Alan Cox
2002-11-20 16:03 ` Joel Becker
2002-11-20 23:31 ` Neil Brown
2002-11-21 1:46 ` Doug Ledford
2002-11-21 19:34 ` Joel Becker
2002-11-21 19:54 ` Doug Ledford
2002-11-21 19:57 ` Steven Dake
2002-11-21 20:38 ` Doug Ledford
2002-11-21 20:49 ` Steven Dake
2002-11-21 20:35 ` Kevin Corry [this message]
2002-11-21 21:29 ` Alan Cox
2002-11-21 21:22 ` Doug Ledford
2002-11-21 20:53 ` Kevin Corry
2002-11-21 21:55 ` Doug Ledford
2002-11-21 23:49 ` DM vs MD (Was: RFC - new raid superblock layout for md driver) Luca Berra
2002-11-21 20:06 ` RFC - new raid superblock layout for md driver Joel Becker
2002-11-21 23:35 ` Luca Berra
2002-11-22 10:13 ` Joe Thornber
2002-12-02 21:38 ` Neil Brown
2002-12-03 8:24 ` Luca Berra
2002-11-20 17:05 ` Steven Dake
2002-11-20 23:30 ` Lars Marowsky-Bree
2002-11-20 23:48 ` Neil Brown
2002-11-21 0:29 ` Steven Dake
2002-11-21 15:23 ` John Stoffel
2002-11-21 19:36 ` Joel Becker
2002-11-22 7:11 ` Jeremy Fitzhardinge
-- strict thread matches above, loose matches on Subject: below --
2002-11-20 15:55 Steve Pratt
2002-11-20 23:24 ` Neil Brown
2002-11-20 23:47 Lars Marowsky-Bree
2002-11-21 0:31 ` Neil Brown
2002-11-21 0:35 ` Steven Dake
2002-11-21 1:10 ` Alan Cox
2002-12-08 22:35 ` Neil Brown
2002-11-21 19:39 ` Joel Becker
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