code: def fast_sync_snapshot_decompress( snapshot_path, output_dir ):
      
      if not tarfile.is_tarfile(snapshot_path):
          return {'error': 'Not a tarfile-compatible archive: {}'.format(snapshot_path)}
  
      if not os.path.exists(output_dir):
          os.makedirs(output_dir)
  
      with tarfile.TarFile.bz2open(snapshot_path, 'r') as f:
          tarfile.TarFile.extractall(f, path=output_dir)
  
      return {'status': True}
docs: Given the path to a snapshot file, decompress it and 
      write its contents to the given output directory
  
      Return {'status': True} on success
      Return {'error': ...} on failure