@Override
    public FSDataOutputStream append(Path path, int bufferSize,
                                     Progressable progressable
                                     ) throws IOException {
      statistics.incrementWriteOps(1);
      checkAccess();
      return create(path, FsPermission.getDefault(), true, bufferSize,
          (short) 3, 256 * 1024, progressable);
    }
WARNING: detele(Path...) don't actually delete
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestInputOutputFormat.java