def mark_log(self, filename='system.log'):
        log_file = os.path.join(self.get_path(), 'logs', filename)
        if not os.path.exists(log_file):
            return 0
        with open(log_file) as f:
            f.seek(0, os.SEEK_END)
            return f.tell()
Returns "a mark" to the current position of this node Cassandra log.
dataset/ETHPy150Open pcmanus/ccm/ccmlib/node.py/Node.mark_log