Hardlink problem when balancing the pool

[racerlucas]

When I tried to balance the pool by mergerfs.balance, something like this happended:
before:
disk 1: 90% full
/srv/disk1/.BT/Video/Movie
--movie1.mkv
--movie2.mkv
/srv/disk1/Video/Movie
--movie1.mkv(hardlinked, no actual space occupied)
--movie2.mkv(hardlinked, no actual space occupied)
disk 2: 80% full

after:
disk 1: 90% full
/srv/disk1/.BT/Video/Movie
--movie1.mkv
--movie2.mkv
disk 2: 90% full
/srv/disk2/Video/Movie
--movie1.mkv(actual space occupied)
--movie2.mkv(actual space occupied)

is that a bug? or I can fix that by changing some settings?

[trapexit]

No, it's not a bug. mergerfs.balance is just a simple tool. It's not intended for general use and does not do anything to attempt to preserve links. It literally scans the filesystem with the least % free space for the first file it finds and moves it to the filesystem with the most % free space. That's it. It was expressly designed for people to run once if they wanted mfs policy or similar and forgot to change from the default epmfs. If you want custom behaviors for moving stuff around you have to do it yourself. Everyone has there own expectations.