while (!fin.eof()) {
    field_name[0] = '\0';
    fin >> field_name;
    if (0) {
    }
    PARAM(hotset_size)
    PARAM(hotset_frequency)
    PARAM(touch_data)
    PARAM(use_lseek)
    PARAM(write_after)
    PARAM(write_skip)
    PARAM(disk_size)
    PARAM(seq_read_percent)
    PARAM(seq_write_percent)
    PARAM(rand_read_percent)
    PARAM(seq_read_size)
    PARAM(seq_write_size)
    PARAM(rand_read_size)
    PARAM(run_time)
    PARAM(chains)
    PARAM(threads_per_disk)
    PARAM(delete_disks)
    else if (strcmp(field_name, "disk_path") == 0)
    {
      assert(n_disk_path < MAX_DISK_THREADS);
      fin >> field_value;
      disk_path[n_disk_path] = strdup(field_value);
      cout << "reading disk_path = " << disk_path[n_disk_path] << endl;
      n_disk_path++;
    }
  }