sslug-teknik team mailing list archive

[Peter Makholm <peter@xxxxxxxxxxx>]

Frank Vestergaard Pedersen <frank@xxxxxxxxxx> writes:

> Hvor mange filer kan et dir mountet på en ext3 partition max indeholde ?

Fra /usr/src/linux/Documentation/filesystems/ext2.txt, afsnitet
'Limitations':

  There is an upper limit of 32768 subdirectories in a single directory.

  There is a "soft" upper limit of about 10-15k files in a single
  directory with the current linear linked-list directory
  implementation.  This limit stems from performance problems when
  creating and deleting (and also finding) files in such large
  directories.  Using a hashed directory index (under development)
  allows 100k-1M+ files in a single directory without performance
  problems (although RAM size becomes an issue at this point).

  The (meaningless) absolute upper limit of files in a single
  directory (imposed by the file size, the realistic limit is
  obviously much less) is over 130 trillion files.  It would be higher
  except there are not enough 4-character names to make up unique
  directory entries, so they have to be 8 character filenames, even
  then we are fairly close to running out of unique filenames.

-- 
 Peter Makholm     |              Emacs is the only modern general-purpose
 peter@xxxxxxxxxxx |               operating system that doesn't multitask
 http://hacking.dk |