文件夹和文件大小的那些事

2014-12-18

近来经常有人问一个文件夹下面最多可以放多少个文件,文件大小等问题,为了能准确回答,Google之后在stackflow上找到了比较完整的答案。

  1. FAT32:
    • 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
  2. NTFS:
    • 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
  3. ext2:
    • 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)
  4. ext3:
    • Maximum number of files: min(volumeSize / 213, numberOfBlocks)
    • Maximum file size: same as ext2
    • Maximum volume size: same as ext2
  5. ext4:
    • 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)

归根结底,这些问题与底层所处的文件系统有关。

查看原文链接http://stackoverflow.com/questions/466521/how-many-files-can-i-put-in-a-directory

Category: 笔记 Tagged: 文件系统

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