def set_device_read_ahead(read_ahead, devices=None):
    if devices is None:
        devices = config['block_devices']
    execute(common.set_device_read_ahead, read_ahead, devices)
Set device read ahead.
dataset/ETHPy150Open datastax/cstar_perf/tool/cstar_perf/tool/benchmark.py/set_device_read_ahead