Reiser4 is computer file system, a new version of the ReiserFS file system, written from scratch. It has following advanced features:

  • efficient support of small files,
  • handling of large and very large directories with hundreds of millions of files,
  • flexible plugin infrastructure,
  • atomic file system modification,
  • efficient journalling through wandering logs,
  • dynamically optimized disk-layout (through allocate-on-flush, and online repacker), and
  • the integration of meta-data into the file system name-space.

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