public List<Path> getPaths() {
    if (historicalFileWriter == null) {
      return Lists.newArrayList(liveFileWriter.getPath());
    }
    return Lists.newArrayList(liveFileWriter.getPath(), historicalFileWriter.getPath());
  }
Add TimestampRange and earliest put timestamp to Metadata
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileWriter.java