lzip/tarlz
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Merging upstream version 0.19.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
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Daniel Baumann 2025-02-17 21:15:39 +01:00
parent 84460224b0
commit b53e340348
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
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README
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@ -1,13 +1,15 @@
Description
Tarlz is a massively parallel (multi-threaded) combined implementation of
the tar archiver and the lzip compressor. Tarlz creates, lists, and extracts
archives in a simplified and safer variant of the POSIX pax format
compressed with lzip, keeping the alignment between tar members and lzip
members. The resulting multimember tar.lz archive is fully backward
compatible with standard tar tools like GNU tar, which treat it like any
other tar.lz archive. Tarlz can append files to the end of such compressed
archives.
the tar archiver and the lzip compressor. Tarlz uses the compression library
lzlib.
Tarlz creates tar archives using a simplified and safer variant of the POSIX
pax format compressed in lzip format, keeping the alignment between tar
members and lzip members. The resulting multimember tar.lz archive is fully
backward compatible with standard tar tools like GNU tar, which treat it
like any other tar.lz archive. Tarlz can append files to the end of such
compressed archives.
Keeping the alignment between tar members and lzip members has two
advantages. It adds an indexed lzip layer on top of the tar archive, making
@ -16,7 +18,7 @@ amount of data lost in case of corruption. Compressing a tar archive with
plzip may even double the amount of files lost for each lzip member damaged
because it does not keep the members aligned.
Tarlz can create tar archives with five levels of compression granularity;
Tarlz can create tar archives with five levels of compression granularity:
per file (--no-solid), per block (--bsolid, default), per directory
(--dsolid), appendable solid (--asolid), and solid (--solid). It can also
create uncompressed tar archives.
@ -40,8 +42,8 @@ archive, but it has the following advantages:
lziprecover can be used to recover some of the damaged members.
* A multimember tar.lz archive is usually smaller than the corresponding
solidly compressed tar.gz archive, except when compressing files
smaller than about 32 KiB individually.
solidly compressed tar.gz archive, except when individually
compressing files smaller than about 32 KiB.
Note that the POSIX pax format has a serious flaw. The metadata stored in
pax extended records are not protected by any kind of check sequence.
@ -85,7 +87,7 @@ tar.lz
+===============+=================================================+========+
Copyright (C) 2013-2020 Antonio Diaz Diaz.
Copyright (C) 2013-2021 Antonio Diaz Diaz.
This file is free documentation: you have unlimited permission to copy,
distribute, and modify it.