From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heinz Mauelshagen Subject: Re: [PATCH 000 of 5] md: Introduction Date: Fri, 20 Jan 2006 19:38:40 +0100 Message-ID: <20060120183840.GB2799@redhat.com> References: <26A66BC731DAB741837AF6B2E29C1017D47EA0@xmb-hkg-413.apac.cisco.com> <17358.52476.290687.858954@cse.unsw.edu.au> <43D00FFA.1040401@cfl.rr.com> <17360.5011.975665.371008@cse.unsw.edu.au> <43D02033.4070008@cfl.rr.com> <17360.9233.215291.380922@cse.unsw.edu.au> <43D04828.8010107@cfl.rr.com> <20060120105306.GY22163@marowsky-bree.de> Reply-To: mauelshagen@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <20060120105306.GY22163@marowsky-bree.de> Sender: linux-raid-owner@vger.kernel.org To: Lars Marowsky-Bree Cc: Phillip Susi , Neil Brown , Jan Engelhardt , "Lincoln Dale (ltd)" , Michael Tokarev , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, "Steinar H. Gunderson" List-Id: linux-raid.ids On Fri, Jan 20, 2006 at 11:53:06AM +0100, Lars Marowsky-Bree wrote: > On 2006-01-19T21:17:12, Phillip Susi wrote: >=20 > > I am under the impression that dm is simpler/cleaner than md. That= =20 > > impression very well may be wrong, but if it is simpler, then that'= s a=20 > > good thing.=20 >=20 > That impression is wrong in that general form. Both have advantages a= nd > disadvantages. >=20 > I've been an advocate of seeing both of them merged, mostly because I > think it would be beneficial if they'd share the same interface to > user-space to make the tools easier to write and maintain. >=20 > However, rewriting the RAID personalities for DM is a thing only a fo= ol > would do without really good cause. Thanks Lars ;) > Sure, everybody can write a > RAID5/RAID6 parity algorithm. But getting the failure/edge cases stab= le > is not trivial and requires years of maturing. >=20 > Which is why I think gentle evolution of both source bases towards so= me > common API (for example) is much preferable to reinventing one within > the other. >=20 > Oversimplifying to "dm is better than md" is just stupid. >=20 >=20 >=20 > Sincerely, > Lars Marowsky-Br=E9e >=20 > --=20 > High Availability & Clustering > SUSE Labs, Research and Development > SUSE LINUX Products GmbH - A Novell Business -- Charles Darwin > "Ignorance more frequently begets confidence than does knowledge" >=20 > - > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html Regards, Heinz -- The LVM Guy -- =3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 Cluster and Storage Development 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D= -=3D-=3D-=3D- - To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html