if(function==ConsolFun.AVERAGE) {
// for measurement values, we define archives that are suitable for charts
rrdDef.setStep(60);
rrdDef.setStartTime(System.currentTimeMillis()/1000-1);
rrdDef.addDatasource(DATASOURCE_STATE, DsType.GAUGE, 60, Double.NaN, Double.NaN);
rrdDef.addArchive(function, 0.5, 1, 480); // 8 hours (granularity 1 min)
rrdDef.addArchive(function, 0.5, 4, 360); // one day (granularity 4 min)
rrdDef.addArchive(function, 0.5, 15, 644); // one week (granularity 15 min)
rrdDef.addArchive(function, 0.5, 60, 720); // one month (granularity 1 hour)
rrdDef.addArchive(function, 0.5, 720, 730); // one year (granularity 12 hours)
rrdDef.addArchive(function, 0.5, 10080, 520); // ten years (granularity 7 days)