Due to some recent conversations I’ve had in both forum and other about online defragmenting file systems,
It seems the following are available on openSUSE…
EXT4 - e4defrag has existed in the existed in the e2fsprogs kernel module since 2012, which is apparently an updated version of the earlier e2defrag. Should automatically be available without any package installation, with MAN page.
BTRFS - There are many possible methods, some of the following is from the Arch Wiki BTRFS
The following compresses and defrags files in the root partition
btrfs filesystem defragment -r -v -clzo /
BTRFS supports the mount option (can be added to your fstab) “autodefrag”
The following command defrags the root partition manually
btrfs filesystem defragment -r /
Although there is a “btrfs-defrag.py” utillty in the btrfsprogs package source (github), it doesn’t seem to be part of the current openSUSE package.