예제 #1
0
func whisperWorker() {
	for path := range whisperFiles {
		fd, err := os.Open(path)
		if err != nil {
			fmt.Fprintf(os.Stderr, "ERROR: Failed to open whisper file '%s': %s\n", path, err.Error())
			if !skipWhisperErrors {
				return
			}
		}
		w, err := whisper.OpenWhisper(fd)
		if err != nil {
			fmt.Fprintf(os.Stderr, "ERROR: Failed to open whisper file '%s': %s\n", path, err.Error())
			if !skipWhisperErrors {
				return
			}
		}

		var earliestArchiveTimestamp uint32

		numTotalPoints := uint32(0)
		for i := range w.Header.Archives {
			numTotalPoints += w.Header.Archives[i].Points
		}
		points := make(map[uint32]whisper.Point)

		// iterate over archives from high-res to low-res, remembering
		// the earliest timestamp and filtering out those rows from
		// subsequent archives so as to never have duplicates.

		for i, archive := range w.Header.Archives {
			allPoints, err := w.DumpArchive(i)
			if err != nil {
				fmt.Fprintf(os.Stderr, "ERROR: Failed to read archive %d in '%s', skipping: %s\n", i, path, err.Error())
				if !skipWhisperErrors {
					return
				}
			}

			var earliestTimestamp uint32 = 0
			var latestTimestamp uint32 = 0
			n := 0
			for _, point := range allPoints {
				// we have to filter out the "None" records (where we didn't fill in data) explicitly here!
				if point.Timestamp != 0 {
					if earliestArchiveTimestamp == 0 || point.Timestamp < earliestArchiveTimestamp {

						point.Value = point.Value
						points[point.Timestamp] = point
						n += 1
						if earliestTimestamp > point.Timestamp || earliestTimestamp == 0 {
							earliestTimestamp = point.Timestamp
						}
						if latestTimestamp < point.Timestamp || latestTimestamp == 0 {
							latestTimestamp = point.Timestamp
						}
					}
				}
			}

			// And now we need to remove all points that are latest - retention
			if earliestTimestamp < latestTimestamp-archive.SecondsPerPoint*archive.Points {
				earliestArchiveTimestamp = latestTimestamp - archive.SecondsPerPoint*archive.Points
			} else {
				earliestArchiveTimestamp = earliestTimestamp
			}

			n = 0
			for ts, _ := range points {
				if ts < earliestArchiveTimestamp {
					delete(points, ts)
					n += 1
				}
			}
		}

		w.Close()

		serie := &abstractSerie{path, points}
		series <- serie
	}
	whisperWorkersWg.Done()
}
func whisperWorker() {
	for path := range whisperFiles {
		fd, err := os.Open(path)
		if err != nil {
			fmt.Fprintf(os.Stderr, "ERROR: Failed to open whisper file '%s': %s\n", path, err.Error())
			if skipWhisperErrors {
				continue
			} else {
				exit <- 2
			}
		}
		w, err := whisper.OpenWhisper(fd)
		if err != nil {
			fmt.Fprintf(os.Stderr, "ERROR: Failed to open whisper file '%s': %s\n", path, err.Error())
			if skipWhisperErrors {
				continue
			} else {
				exit <- 2
			}
		}
		pre := time.Now()

		var duration time.Duration
		var points []whisper.Point
		if all {
			numTotalPoints := uint32(0)
			for i := range w.Header.Archives {
				numTotalPoints += w.Header.Archives[i].Points
			}
			points = make([]whisper.Point, 0, numTotalPoints)
			// iterate in backwards archive order (low res to high res)
			// so that if you write points of multiple archives to the same series, the high res ones will overwrite the low res ones
			for i := len(w.Header.Archives) - 1; i >= 0; i-- {
				allPoints, err := w.DumpArchive(i)
				if err != nil {
					fmt.Fprintf(os.Stderr, "ERROR: Failed to read archive %d in '%s', skipping: %s\n", i, path, err.Error())
					if skipWhisperErrors {
						continue
					} else {
						exit <- 2
					}
				}
				for _, point := range allPoints {
					// we have to filter out the "None" records (where we didn't fill in data) explicitly here!
					if point.Timestamp != 0 {
						points = append(points, point)
					}
				}
			}
			duration = time.Since(pre)
		} else {
			// not sure how it works, but i've emperically verified that this ignores null records, which is what we want
			// i.e. if whisper has a slot every minute, but you only have data every 3 minutes, we'll only process those records
			_, points, err = w.FetchUntil(fromTime, untilTime)
			duration = time.Since(pre)
			if err != nil {
				fmt.Fprintf(os.Stderr, "ERROR: Failed to read file '%s' from %d to %d, skipping: %s (operation took %v)\n", path, fromTime, untilTime, err.Error(), duration)
				if skipWhisperErrors {
					w.Close()
					continue
				} else {
					exit <- 2
				}
			}
		}

		w.Close()

		whisperReadTimer.Update(duration)
		serie := &abstractSerie{path, points}
		influxSeries <- serie
	}
	whisperWorkersWg.Done()
}