private static long getDirSize(FileSystem fs, AcidUtils.ParsedDirectory dir) throws IOException {
    return dir.getFiles(fs, Ref.from(false)).stream().map(HadoopShims.HdfsFileStatusWithId::getFileStatus)
        .mapToLong(FileStatus::getLen).sum();
  }
Check for that special case when minor compaction is supported or not.
<ul>
  <li>The table is Insert-only OR</li>
  <li>Query based compaction is not enabled OR</li>
  <li>The table has only acid data in it.</li>
</ul>
@param tblProperties The properties of the table to check
@param dir The {@link AcidDirectory} instance pointing to the table's folder on the filesystem.
@return Returns true if minor compaction is supported based on the given parameters, false otherwise.
ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/CompactorUtil.java