On 28/09/2021 01:34, Sven Oehme wrote:

the workload is as simple as one can imagine :

scp -rp /space/01/ /space/20/
where space/01 is a ext4 filesystem with several >100gb files in it,
/space/20 is the btrfs destination

its single threaded , nothing special

Thanks for the info, I'm trying to recreate the issue locally.