From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: wish for Linux MD mirrored raid types Date: Mon, 9 May 2011 05:40:36 +0200 Message-ID: <20110509034036.GA17111@www2.open-std.org> References: <20110506071752.GA22063@www2.open-std.org> <20110508181445.GB7629@maude.comedia.it> <4DC70A44.5050101@meetinghouse.net> 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: <4DC70A44.5050101@meetinghouse.net> Sender: linux-raid-owner@vger.kernel.org To: Miles Fidelman Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Sun, May 08, 2011 at 05:25:24PM -0400, Miles Fidelman wrote: > Luca Berra wrote: > >On Fri, May 06, 2011 at 09:17:52AM +0200, Keld J=F8rn Simonsen wrote= : > >>I would like linux MD raid10 functionality to be part of the Linux = MD > >>RAID1 module, and be called raid1. This is in accordance with the > >then we need rename the current raid1 functionality to 'mirror'. in > >order to avoid further confusion. > >besides, current raid10 does not support resizing, so the feature > >should be added before ditching 'mirror' > > >=20 > The current md RAID1 does exactly what RAID1 is supposed to do. I changed my mind a little. I think we should follow SNIA wrt. RAID1 - all that SNIA would say is RAID1 we also should be able to do as RAID1 - that would include raid10-offset which directly was implemented in the Linux kernel because of the SNIA RAID1 specification. It should also include raid10-= far in so far it is a raid1 type - say a raid10,f2 with only 2 disks.=20 Then we should keep the raid10 stuff. > The md RAID10 is a very specific, and unique approach that has=20 > similarities to, but is distinct from, RAID1+0, RAID0+1, RAID5, and R= AID6. Yes, Linux MD raid10 is a very distinct type. We should talk with SNIA = to get it recognized. > What say we leave the names alone. Just beause one person is confuse= d is=20 > no reason to further confuse things. The confusion is not just one person. The confusion is unbelievable com= mon,=20 and has proven to be very hard to eliminate. If we align with the SNIA standard, and further get the standard to align with us, then we should have a chance in say 5 years to have reduced the confusion considerably= =2E Best regards Keld -- 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