On Wed, Nov 17, 2010 at 7:12 AM, Bart Noordervliet <bart@xxxxxxxxxxxxxxxx> wrote: > On Wed, Nov 17, 2010 at 15:31, Hugo Mills <hugo-lkml@xxxxxxxxxxxxx> wrote: >> On Tue, Nov 16, 2010 at 10:19:45PM -0500, Chris Ball wrote: >>> == Changing RAID levels == >>> >>> We need ioctls to change between different raid levels. ÂSome of these >>> are quite easy -- e.g. for RAID0 to RAID1, we just halve the available >>> bytes on the fs, then queue a rebalance. >> >> Â I would be interested in the rebalancing ioctls, and in RAID level >> management. I'm still very much trying to learn the basics, though, so >> I may go very slowly at first... >> >> Â 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. > That would inherently solve the need to convert between dup and raid1 as well. Why those are separate and why dup does not become raid1 when there are N > 1 drives is beyond me. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
