Has (or had) some I/O alignment via libfgapi to be applied?

[olegkrutov]

When I tested i/o via libgfapi (gluster 9.2-1 and 10.1) I got that I can read and write literally 1 byte of data. So, since in qemu codebase i/o for libgfapi is still sector-based, I wrote a small patch for qemu that enables unaligned I/O for libgfapi backend. And this works for me. Fuse-mount performs byte-based i/o too. But what this mailing thread is about? What alignment is discussed there? What meaning of sector size is for gluster volume? Did it exist in some gluster previous versions?