object
method mr_buffer_size : int
method mr_buffer_size_tight : int
method mr_shm_high : int64
method mr_shm_low : int64
method mr_sort_size : int
method mr_task_load_limit : float
method mr_task_nodes : string list
method mr_task_port : int
method mr_task_tmpdir : string
method nn_clustername : string
method nn_nodes : string list
end
