Comments (3)
If you have bees set up correctly it will not cross filesystem boundaries. If you don't give bees the root of a btrfs, bees should detect that immediately and refuse to process the filesystem. If something is mounted on top of the bees mount point, bees will detect that the metadata doesn't agree with the behavior of open() and refuse to process the data. Directory traversals are done with openat() and O_NOFOLLOW to avoid filesystem races, and every opened FD is checked for consistency with the expected inode. If you can get bees to stray from one btrfs filesystem to another and then run EXTENT_SAME there, I would like to know how.
Can you describe your setup in more detail?
There is one known bug with EXTENT_SAME--when there is a hole between the first and second 4K block (i.e. inline extent, hole between end of extent and second 4K block, then regular extent), EXTENT_SAME returns EINVAL. bees could theoretically check for that but it doesn't usually happen often enough to justify the extra code.
from bees.
I guess the simplest equivalent would be:
btrfs root subvol mounted on /tmp/brtfs
underneath, a subvol named jessie, so /tmp/btrfs/jessie
underneath that procfs mounted on /tmp/btrfs/jessie/proc
(so can do chroot stuff within)
When I ran bees on /tmp/btrfs, I saw proc files were being looked at.
I have bind mounted /tmp/btrfs on /tmp/x, and am running bees on /tmp/x now, and dedup seems to be proceeding.
from bees.
don't currently have a setup like this with a kernel compatible with bees, so closing for now.
from bees.
Related Issues (20)
- Used size increased by ~400GB while defragmenting HOT 2
- Mount prevent second run HOT 1
- bees seemingly cannot catch up with snapper snapshot creation HOT 16
- Initial run of bees appears to have resulted in data corruption HOT 7
- bees breaks existing reflinks? HOT 4
- bees "--loadavg=3" option causes load crazy 20+ and OOM kill HOT 1
- beesd script can't handle BEESHOME on a non-btrfs filesystem HOT 4
- Stopping one of multiple beesd services removes the /run/bees directory HOT 4
- 执行bee run之后一直卡出不动 HOT 2
- Lookup root 256 ino xxx failed: Bad address HOT 1
- Documentation: modern Ubuntu install HOT 1
- [Feature Request] Unmount mount points if beesd exits.
- [Feature Request] Beesd to run a full dedup cycle and then end HOT 6
- How to remove? HOT 10
- cancelling with CTRL+C need to be followed by umount /run/bees/mnt/$UUID HOT 3
- build fails on Fedora 40
- Demystifying needed options with QubesOS pool in btrfs reflink (multiple cow snapshots rotating, beesd dedup and load avg hitting 65+ on 12 cores setup) HOT 4
- btrfs send size HOT 3
- one question: multiple cloned sets, two proposals: de-duplicate on write, 'only new' option, HOT 5
- How to Force Rescan after increasing Hash Table Size? HOT 4
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from bees.