Accelerating btrfs

If the kernel zlib is compiled with support for the Integrated Accelerator for zEDC, you can enable it for btrfs through a mount option.

Red Hat Enterprise Linux 9.2 LPAR mode z/VM guest KVM guest

By default, btrfs requests compression level 3, but the Integrated Accelerator for zEDC provides compression level 1. If compression level 1 is acceptable for your purposes, mount your instance of btrfs with the compress=zlib:1 option.