mkzftree

creates compressed filesystem trees

TLDR

Compress directory tree

$ mkzftree [input/] [output/]

Set compression level (1-9, default 9)

$ mkzftree -z [6] [input/] [output/]

Force compression of every file (even if larger after compression)

$ mkzftree -f [input/] [output/]

Verbose output

$ mkzftree -v [input/] [output/]

Parallelize compression with N threads

$ mkzftree -p [4] [input/] [output/]

Uncompress a zisofs tree back to plain files

$ mkzftree -u [input/] [output/]

SYNOPSIS

mkzftree [options] input output

mkzftree creates compressed directory trees suitable for use with transparent decompression on ISO 9660 (zisofs) filesystems. Files in the output tree are individually compressed using zlib, and the directory structure is preserved.The compressed trees are designed to be used with mkisofs (or genisoimage) with the `-z` option to create ISO images where files are transparently decompressed at read time on Linux systems with zisofs support.

PARAMETERS

INPUT

Source directory (or file with -F).

OUTPUT

Destination directory/file.

-z, --level LEVEL

Compression level 1-9 (default: 9). Lower is faster, higher compresses more.

-f, --force

Always compress, even if the result is larger than the original.

-u, --uncompress

Uncompress a previously compressed tree.

-p, --parallelism N

Number of parallel compression threads.

-F, --file

Treat INPUT as a single file rather than a directory tree.

-x, --one-filesystem

Do not cross filesystem boundaries; create directory stubs at mount points.

-X, --strict-one-filesystem

Do not cross filesystem boundaries and do not create stubs.

-l, --local

Do not recurse into subdirectories (still creates the directories).

-s, --sloppy

Relax preservation of file modes, times, and ownership.

-v, --verbose

Increase verbosity.

-q, --quiet

Suppress all messages including errors.

-h, --help

Display help information.

-w, --version

Display version information.

CAVEATS

Part of zisofs-tools. Transparent decompression requires Linux kernel zisofs support. Only useful for ISO 9660 filesystem creation; not a general-purpose compression tool.

HISTORY

mkzftree is part of zisofs-tools for creating transparent compression on ISO9660 filesystems.