I have a 256GB SSD disk on which I converted my ext4 root FS to btrfs. I erased the ext4 backup subvolume, enabled compression and defragmented recursively to enable it on all files.
btrfs fi df / has an output that worries me though:
Data: total=148.00GB, used=106.11GB System: total=32.00MB, used=16.00KB Metadata: total=65.00GB, used=2.04GB
If I understand the output correctly, 65GB (1/4 of my disk!) is reserved for meta-data and not available for storing files. If this is correct, it would be a huge waste of my disk space. Am I understanding correctly? Can the metadata-allocated portion of my disk be resized?