On Saturday 02 of July 2011 19:04:43 Andi Kleen wrote: > > The two big features of btrfs are self-healing and online fsck, those > > have to > > Are they?
they are scheduled to be, just like RAID5/6, mixed RAID in single FS... > > be implemented in kernel space. > > Why? There have been online fscks in user space in the past, > e.g. the various schemes using LVM snapshots for ext* and > other related work on the BSD FFS. I don't see any principal > reason why it couldn't be done for btrfs either. Doing a fsck on LVM snapshot of btrfs: 1. is impossible (UUIDs) 2. won't fix errors I have to note that I don't know how FFS fsck is implemented. > A good fsck is quite complex and you are unlikely to want all > that code in kernel space. complete one, yes, but it's not quite pointless, ZFS does it like this and admins rather like it -- Hubert Kario QBS - Quality Business Software ul. Ksawerów 30/85 02-656 Warszawa POLAND tel. +48 (22) 646-61-51, 646-74-24 fax +48 (22) 646-61-50 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
