UFS files in a directory limit?

[Peter Jeremy]

On 2010-Mar-24 06:53:22 +1100, Bruce Evans <brde at optusnet.com.au> wrote:
>On Sun, 21 Mar 2010, Kirk McKusick wrote:
>> The only limit on the size of a directory is the number of files that
>> you can have in the filesystem. There is a limit of 2^16 directories
>                                                       2^15-1
>> within a directory due to the limit on the number of hard links.

If we're going to be pedantic, it's 2^15-3 sub-directories: There's a
maximum of 2^15-1 hardlinks.  One is used for the directory's name in
its parent directory, one is used for the '.' entry in the directory
itself and one-per-sub-directory is needed for the '..' entry in each
sub-directory.

(And a single file could theoretically have up to 2^15-1 hardlinks
within a single directory - though this would not be particularly
sensible).

-- 
Peter Jeremy
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