def _parse_metrics(self, message):
        results = []
        for line in message.split("\n"):
            # If the line is blank, we ignore it
            if len(line) == 0: continue

            # Parse the line, and skip it if its invalid
            try:
                (key, value, metric_type, flag) = parser.parse_line(line)
            except ValueError:
                self.logger.error("Invalid line syntax: %s" % line)
                continue

            # Create the metric and store it in our results
            if metric_type in metrics.METRIC_TYPES:
                # Create and store the metric object
                metric = metrics.METRIC_TYPES[metric_type](key, value, flag)
                results.append(metric)
            else:
                # Ignore the bad invalid metric, but log it
                self.logger.error("Invalid metric '%s' in line: %s" % (metric_type, line))

        return results
If an extra volume is created for a dataset, that volume isn't used.
dataset/ETHPy150Open kiip/statsite/statsite/collector.py/Collector._parse_metrics--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/acceptance/endtoend/test_dataset.py/DatasetAPITests.test_extra_volume