From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Noordervliet Subject: Re: Update to Project_ideas wiki page Date: Wed, 17 Nov 2010 16:12:29 +0100 Message-ID: References: <20101117143103.GA2401@selene> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: Hugo Mills , Chris Ball , linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20101117143103.GA2401@selene> List-ID: On Wed, Nov 17, 2010 at 15:31, Hugo Mills wro= te: > On Tue, Nov 16, 2010 at 10:19:45PM -0500, Chris Ball wrote: >> =3D=3D Changing RAID levels =3D=3D >> >> We need ioctls to change between different raid levels. =C2=A0Some o= f these >> are quite easy -- e.g. for RAID0 to RAID1, we just halve the availab= le >> bytes on the fs, then queue a rebalance. > > =C2=A0 I would be interested in the rebalancing ioctls, and in RAID l= evel > management. I'm still very much trying to learn the basics, though, s= o > I may go very slowly at first... > > =C2=A0 Hugo. Can I suggest we combine this new RAID level management with a modernisation of the terminology for storage redundancy, as has been discussed previously in the "Raid1 with 3 drives" thread of March this year? I.e. abandon the burdened raid* terminology in favour of something that makes more sense for a filesystem. Mostly this would involve a discussion about what terms would make most sense, though some changes in the behaviour of btrfs redundancy modes may be warranted if they make things more intuitive. I could help you make these changes in your patches, or write my own patches against yours, though I'm also completely new to kernel development. Best regards, Bart -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html