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Maximum number of files in a directory

2018-08-25 ONE NET WIKI

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Maximum number of files in a directory depends on a specific file system.


FAT32 (File Allocation Table)

Maximum number of files: 268,173,300

Maximum number of files per directory: 216 - 1 (65,535)

Maximum file size: 2 GiB - 1 without LFS, 4 GiB - 1 with LFS


NTFS (New Technology File System)

Maximum number of files: 232 - 1 (4,294,967,295)

Maximum file size

  • Implementation: 244 - 26 bytes (16 TiB - 64 KiB)

  • Theoretical: 264 - 26 bytes (16 EiB - 64 KiB)

Maximum volume size

  • Implementation: 232 - 1 clusters (256 TiB - 64 KiB)

  • Theoretical: 264 - 1 clusters


ext2 (Second Extended File System)

Maximum number of files: 1018

Maximum number of files per directory: ~1.3 × 1020 (performance issues past 10,000)

Maximum file size

  • 16 GiB (block size of 1 KiB)

  • 256 GiB (block size of 2 KiB)

  • 2 TiB (block size of 4 KiB)

  • 2 TiB (block size of 8 KiB)

Maximum volume size

  • 4 TiB (block size of 1 KiB)

  • 8 TiB (block size of 2 KiB)

  • 16 TiB (block size of 4 KiB)

  • 32 TiB (block size of 8 KiB)


ext3 (Third Extended File System)

Maximum number of files: min(volumeSize / 213, numberOfBlocks)

Maximum file size: same as ext2

Maximum volume size: same as ext2


ext4 (Fourth Extended File System)

Maximum number of files: 232 - 1 (4,294,967,295)

Maximum number of files per directory: unlimited

Maximum file size: 244 - 1 bytes (16 TiB - 1)

Maximum volume size: 248 - 1 bytes (256 TiB - 1)

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