private void updateRedundancyStatistics(int updatedBucketHosts) {
    int updatedRedundancy = updatedBucketHosts - 1;
    updateCurrentRedundancy(updatedRedundancy);
    if (updatedRedundancy < targetRedundancy) {
      reportUpdatedBucketCount(updatedBucketHosts);
      incrementLowRedundancy();
    } else if (updatedRedundancy == targetRedundancy) {
      decrementLowRedundancy();
      redundancyEverSatisfied = true;
    }
  }
Provides the current redundancy of the bucket for this tracker

@return number of redundant copies of the bucket for this tracker
geode-core/src/main/java/org/apache/geode/internal/cache/BucketRedundancyTracker.java