public boolean isDateTieredStoragePolicyEnable() {
    return dateTieredStoragePolicyEnable;
  }
@return Block locality ratio, the ratio at which we will include old regions with a single
        store file for major compaction. Used to improve block locality for regions that
        haven't had writes in a while but are still being read.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionConfiguration.java