• File size measurements show the distribution of size of files.
• Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
• It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

• There are 71 files with 6,728 lines of code.
• 0 very long files (0 lines of code)
• 1 long files (731 lines of code)
• 8 medium size files (2,077 lines of codeclsfd_ftr_w_mp_ins)
• 20 small files (2,946 lines of code)
• 42 very small files (974 lines of code)

There are 2 files with lines longer than 120 characters. In total, there are 2 long lines.

File	# lines	# units	# long lines
ExportTool.java in backup-command/src/main/java/org/apache/iotdb/backup/command	276	5	1
CsvFileValidationService.java in backup-core/src/main/java/org/apache/iotdb/backup/core/service	247	7	1