운영체제 ext4 최대 디렉토리 수와 파일갯수가 궁금합니다..

설명으로는 후자가 맞는 것으로 보입니다.(64,998개까지 가능)

출처: https://man7.org/linux/man-pages/man5/ext4.5.html 의 dir_nlink 부분

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Normally, ext4 allows an inode to have no more than 65,000

hard links.  This applies to regular files as well as

directories, which means that there can be no more than

64,998 subdirectories in a directory (because each of the

'.' and '..' entries, as well as the directory entry for

the directory in its parent directory counts as a hard

link).  This feature lifts this limit by causing ext4 to

use a link count of 1 to indicate that the number of hard

links to a directory is not known when the link count

might exceed the maximum count limit.