code: private static void updateJobConfForLocalSettings(JobConf conf) {
      String localSetCompressionEnabled = conf.get(COMPRESS_ENABLE);
      if(localSetCompressionEnabled != null) {
        conf.set(MR_COMPRESS_ENABLE, localSetCompressionEnabled);
      }
  
      String localSetCompressionType = conf.get(COMPRESS_TYPE);
      if(localSetCompressionType != null) {
        conf.set(MR_COMPRESS_TYPE, localSetCompressionType);
      }
  
      String localSetCompressionCodec = conf.get(COMPRESS_CODEC);
      if(localSetCompressionCodec != null) {
        conf.set(MR_COMPRESS_CODEC, localSetCompressionCodec);
      }
    }
docs: We can allow overriding the compression settings for just this scheme here