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@@ -1,3 +1,5 @@ +See the file INSTALL for compilation and installation instructions. + Description Plzip is a massively parallel (multi-threaded) implementation of lzip. Plzip @@ -20,7 +22,7 @@ faster than lzip, at the cost of a slightly reduced compression ratio (0.4 to 2 percent larger compressed files). Note that the number of usable threads is limited by file size; on files larger than a few GB plzip can use hundreds of processors, but on files smaller than 1 MiB plzip is no faster -than lzip (even at compression level -0). +than lzip (not even at compression level -0). For creation and manipulation of compressed tar archives tarlz can be more efficient than using tar and plzip because tarlz is able to keep the @@ -40,11 +42,10 @@ decompressed in parallel. The lzip file format is designed for data sharing and long-term archiving, taking into account both data integrity and decoder availability: - * The lzip format provides very safe integrity checking and some data - recovery means. The program lziprecover can repair bit flip errors - (one of the most common forms of data corruption) in lzip files, and - provides data recovery capabilities, including error-checked merging - of damaged copies of a file. + * The program lziprecover can repair bit flip errors (one of the most + common forms of data corruption) in lzip files, and provides data + recovery capabilities, including error-checked merging of damaged + copies of a file. * The lzip format is as simple as possible (but not simpler). The lzip manual provides the source code of a simple decompressor along with a @@ -66,9 +67,8 @@ makes it safer than compressors returning ambiguous warning values (like gzip) when it is used as a back end for other programs like tar or zutils. Plzip automatically uses for each file the largest dictionary size that does -not exceed neither the file size nor the limit given. Keep in mind that the -decompression memory requirement is affected at compression time by the -choice of dictionary size limit. +not exceed neither the file size nor the limit given. The dictionary size +used for decompression is the same dictionary size used for compression. When compressing, plzip replaces every file given in the command line with a compressed version of itself, with the name "original_name.lz". @@ -102,8 +102,11 @@ LANGUAGE NOTE: Uncompressed = not compressed = plain data; it may never have been compressed. Decompressed is used to refer to data which have undergone the process of decompression. +Plzip uses Arg_parser for command-line argument parsing: +http://www.nongnu.org/arg-parser/arg_parser.html + -Copyright (C) 2009-2024 Antonio Diaz Diaz. +Copyright (C) 2009-2025 Antonio Diaz Diaz. This file is free documentation: you have unlimited permission to copy, distribute, and modify it. |