On 9/27/21 3:49 AM, Kent Overstreet wrote: > Snapshots have been merged! 9 months of work and 3k lines of new code, finally > released. Some highlights: > > - btrfs style subvolumes & snapshots interface > - snapshots are writeable > - highly scalable: number of snapshots is limited only by your disk space > - highly space efficient: no internal fragmentation issues > > Design doc here: https://bcachefs.org/Snapshots/ > > The core functionality is complete - snapshot creation and deletion works, fsck > changes are done (most of the complexity was in making fsck work without > O(number of snapshots) performance - tricky). Everything else is a todo item: > > - still need to export different st_dev for files in different subvolumes > (we'll never allocate a new inode with an inode number that collides with an > inode inother subvolume - but snapshots will naturally result in colliding > inode numbers) With my limited high level view on it - shouldn't you discuss with Neil about a solution and to avoid going the btrfs route for colliding inode numbers?
