and limited to 'size' in total (if that is given). If not
given, each created file is the same size.
+file_append=bool Perform IO after the end of the file. Normally fio will
+ operate within the size of a file. If this option is set, then
+ fio will append to the file instead. This has identical
+ behavior to setting offset to the size of a file.
+
fill_device=bool
fill_fs=bool Sets size to something really large and waits for ENOSPC (no
space left on device) as the terminating condition. Only makes