public List<File> getSnapshotFileInfo() throws IOException {
    File snapshotLogFile = getSnapshotLogFile();

    if (snapshotLogFile == null) {
      return searchDataFilesRecursively(snapshotPath);
    } else {
      return getSnapshotFileWithLog(snapshotLogFile);
    }
  }
1. Clear origin data 2. Move snapshot data to data dir 3. Load data region

@return
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/snapshot/SnapshotLoader.java