Function GetCachePercentages

x/x.go:1307–1335

GetCachePercentages returns the slice of cache percentages given the "," (comma) separated cache percentages(integers) string and expected number of caches.

(cpString string, numExpected int)

// GetCachePercentages returns the slice of cache percentages given the "," (comma) separated
// cache percentages(integers) string and expected number of caches.
func GetCachePercentages(cpString string, numExpected int) ([]int64, error) {
	cp := strings.Split(cpString, ",")
	// Sanity checks
	if len(cp) != numExpected {
		return nil, errors.Errorf("ERROR: expected %d cache percentages, got %d",
			numExpected, len(cp))
	}

	var cachePercent []int64
	percentSum := 0
	for _, percent := range cp {
		x, err := strconv.Atoi(percent)
		if err != nil {
			return nil, errors.Errorf("ERROR: unable to parse cache percentage(%s)", percent)
		}
		if x < 0 {
			return nil, errors.Errorf("ERROR: cache percentage(%s) cannot be negative", percent)
		}
		cachePercent = append(cachePercent, int64(x))
		percentSum += x
	}

	if percentSum != 100 {
		return nil, errors.Errorf("ERROR: cache percentages (%s) does not sum up to 100",
			strings.Join(cp, "+"))
	}

	return cachePercent, nil
}

// ParseCompression returns badger.compressionType and compression level given compression string
// of format compression-type:compression-level