Long Range ZIP

Long Range ZIP is a compression program that can achieve very high compression ratios and speed when used with large files. It uses the combined compression algorithms of lzma for maximum compression, lzo for maximum speed, and the long range redundancy reduction of rzip.

It is designed to scale with increases with RAM size, improving compression further. A choice of either size or speed optimizations allows for either better compression than even lzma can provide, or better speed than gzip, but with bzip2 sized compression levels.

What is new in this release:

• This version adds various fixes for the lrztar wrapper.

What is new in version 0.614:

• A fix for a broken lrztar in 0.613 was committed.

What is new in version 0.613:

• This version fixes a bug which made massive files show an incorrect md5 value on decompression, compression of ultra-small files to corrupt archives, compilation on various platforms, and a crash related to using -S.

What is new in version 0.612:

• Minor formatting improvement to delete misaligned %.
• Implement progress counter on zpaq compress/decompress per thread within the Reader function.
• Add some lrzip style defines and optimisations to the lrzip functions inlibzpaq.h
• Re-instantiate the lzo compresses test for zpaq compression.
• Remove redundant code.
• Delete now-unused zpipe code.
• Implement virtual write support for bufWrite to speed up zpaq support and simplify the virtual read function for bufRead.
• Add virtual read() support to the bufRead class to speed up encoding/decoding via the zpaq library.
• Use libzpaq backend for decompression.
• Move zpaq compression to new libzpaq library back end.
• Merge branch 'master' into zpaq
• Add minimal libzpaq compilation support.
• Move to libzpaq directory.
• Import libzapq files.
• Fix Lrzip.h not being installed into include directory and make distcheck failing
• SEPTEMBER 2011, version 0.607 Con Kolivas
• Updated lzma library to version 920.
• Fixed a rare unable-to-decompress corner case.
• Added lrzip completion script.
• Updated makefile to more portable posix version.
• Hopefully fixed compilation on FreeBSD not supporting memopen.
• Added lots more debugging information about offsets in max verbose mode.
• Removed error and warning messages that are spammy or harmless.

What is new in version 0.610:

• A new liblrzip library allows lrzip compression and decompression to be added to other applications.
• The rzip stage is now faster when files are large enough to require the sliding mmap feature and in unlimited mode.
• A bug where multiple files being compressed or decompressed from the one command line could have become corrupted was fixed.
• The modification date of the decompressed file is now set to that of the lrzip archive.
• Compilation warnings were fixed.
• lrztar now works with directories with spaces in their names.

What is new in version 0.608:

• Faster rzip stage through use of selective data access functions.
• The bash completion script is no longer installed by default, so as to not conflict with distribution bash completion packages.
• More compilation fixes for non-Linux platforms.
• Minor cleanups.

What is new in version 0.607:

• A rare case of not being able to decompress archives was fixed.
• The lzma library was updated to version 920.
• A bash completion script for lrzip was added.
• More debugging info was added in maximum verbose mode.
• Fewer messages occur without verbose mode.
• FreeBSD and POSIX compilation fixes were committed.

What is new in version 0.606:

• lrzuntar broke as lrzip doesn't automatically use stdout now, so use lrzcat in the lrztar script instead.

What is new in version 0.605:

• Addition of explicit lrzcat symlink which automatically sets "-d -o -"
• Revert automatic output to stdout due to addition of explicit lrzcat executable, and to be consistent with gzip.
• Fix counter from being zeroed on every loop in rzip.c which was creating excess progress output.
• Update GNU license.
• Set aside at least page_size of zeroes when compressing a chunk, thus allowing files that are otherwise too small to compress with lrzip to be compressed. The zeroes will just be dropped on decompression.
• Add explicit checks to cope with zero sized files as well.
• Remove the arbitrary 128 byte minimum size restriction on archives now that any size file can be safely archived.
• Set the eof flag when reading older file format files to not hang on zero
• byte sized archives.
• Update the percentage counter when getting file info to not overflow with tiny files.
• Set the maximum file mode to 0666 to avoid setting the executable bit when permissions are not carried over (such as from STDIO).