ZPAQ: Extreme compression up to 20% smaller than LZMA, but ultra slow at compression AND decompression.Compressed by a number of other compressors chosen for different reasons, in order of likelihood of usefulness:.Compressed by LZMA (default), which gives excellent compression at approximately twice the speed of bzip2 compression.The lrzip modifications make it scale according to memory size. Lrzip uses an extended version of rzip, which does a first pass long distance redundancy reduction. To completely extract an archived directory: Note that it will be considerably slower but will handle file of any size: If the file you compress is bigger than that, add the -U switch to enable on disk mapping. This will produce an LZMA compressed archive bar.lrz from a file named bar:įor extreme compression, add the -z switch which enables ZPAQ but takes notably longer than LZMA:įor extremely fast compression and decompression, use the -l switch for LZO:īy default, lrzip can use up to your available ram size to remember the file block history. This will produce an LZMA compressed archive from a directory named foo: plain LZMA compression in normal "LZMA compressed archives". Note that the compression algorithms are used after the rzip-like precompressing of the archive, instead of e.g. The advantage can be chosen to be either size (much smaller than bzip2) or speed (much faster than bzip2).Ĭompression of directories (recursive) requires lrztar, which first tars the directory, then compresses the single file just like tar does when users compress with gzip or xz ( tar zcf. The larger the file and the more memory you have, the better the compression advantage this will provide, especially once the files are larger than 100MB. Long Range ZIP (or Lzma RZIP) is a compression program optimised for large files, consisting mainly of an extended rzip step for long-distance redundancy reduction and a normal compressor (LZMA, LZO, gzip, bzip2, or ZPAQ) step.
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