Posix Compatible
Mapfs supports the majority of Posix Standards, but NOT ALL.
| POSIX Items | Standards | Mapfs |
| rename | Yes | No |
| overwrite Non-Empty file | Yes | No |
| file locking | Yes | No |
| file/folder's birth time | Yes | No |
| folder length | folder is a special file, occupies at least 4KB | folder's length is 0 byte. |
| atime | file/folder's last access time | No |
| ctime | file/folder's status change time | ctime is always the same as mtime |
|
setattr: uid/gid/atime/mtime chmod/chown utimens |
Change file/folder's attributes | Noop |
| truncate | Change file length | No |
| symlink | symbolic link | No |
| device file, FIFO file, socket | special type of files | No |
| link | hard link | No |
| statfs | Yes | Return a large enough result |