+/*
+ * Data points received from the logger are sometimes corrupted by noise.
+ * This effects not only the measured values, but also sensor IDs and timestamps.
+ * Since rrdtool cannot skip back in time, a random timestamp in the future can
+ * cause all further measurements to be dropped. To minimize impact of these
+ * problems, we drop data points which are too far in the past or in the future.
+ *
+ * Furthermore, you can ignore data from unrecognized sensors, i.e., those
+ * which are not handled by correct_point().
+ */
+#define MAX_PAST_TIME 30*86400
+#define MAX_FUTURE_TIME 300
+#undef IGNORE_UNKNOWN_SENSORS
+