HEADER_LEN
char buf[HEADER_LEN];
if ((status_file_len < (off_t)HEADER_LEN) || (status_file_len
< (off_t)(HEADER_LEN + sizeof(HostInfo) * status_info->noOfHosts)) )
write(status_fd, buf, HEADER_LEN);
status_file_len = HEADER_LEN;