get_unordered_scanners

一次性获取多个scanner，用于整个table的数据扫描。可以通过scan_options参数指定扫描的模式。

  1. def get_unordered_scanners(self, max_split_count, scan_options):
  2.     """
  3.     Get scanners for the whole pegasus table.
  5.     :param max_split_count: (int) max count of scanners will be returned.
  6.     :param scan_options: (ScanOptions) configurable scan options.
  7.     :return: (list) instance of PegasusScanner list.
  8.              each scanner in this list can scan separate part of the whole pegasus table.
  9.     """