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        String path =
            "/home/fit/szs/data/data/sequence/root.sg/0/"
                + chunkNum
                + "/test"
                + fileIndex
                + ".tsfile";
        File f = FSFactoryProducer.getFSFactory().getFile(path);
        if (f.exists()) {
          f.delete();
        }

        try (TsFileWriter tsFileWriter = new TsFileWriter(f)) {
          // only one timeseries
          tsFileWriter.registerTimeseries(
              new Path(Constant.DEVICE_PREFIX, Constant.SENSOR_1),
              new UnaryMeasurementSchema(Constant.SENSOR_1, TSDataType.INT64, TSEncoding.RLE));

          // construct TSRecord
          for (int i = 1; i <= chunkNum * 100; i++) {
            TSRecord tsRecord = new TSRecord(i, Constant.DEVICE_PREFIX);
            DataPoint dPoint1 = new LongDataPoint(Constant.SENSOR_1, i);
            tsRecord.addTuple(dPoint1);
            // write TSRecord
            tsFileWriter.write(tsRecord);
            if (i % 100 == 0) {
              tsFileWriter.flushAllChunkGroups();
            }
          }
        }