plzip

plzip is a command-line tool designed as a parallel version of the lzip data compressor. Lzip is a lossless data compressor based on the LZMA algorithm, with very safe integrity checking and a user interface similar to the one of gzip or bzip2.

Lzip decompresses almost as fast as gzip and compresses better than bzip2, which makes it well suited for software distribution and data archiving.

What is new in this release:

• Copying of file dates, permissions, and ownership now behaves like "cp -p". (If the user ID or the group ID can't be duplicated, the file permission bits S_ISUID and S_ISGID are cleared).
• Individual limits have been set on the number of packets produced by each decompresor worker thread to limit the amount of memory used in all cases.
• "plzip.texinfo" has been renamed to "plzip.texi".

What is new in version 1.1 Pre1:

• Plzip now shows the progress of compression at verbosity level 2 (-vv).
• Signals "SIGUSR1" and "SIGUSR2" are no longer raised internally to signal a fatal error.

What is new in version 1.0:

• Scalability of compression (max number of useful worker threads) has been increased.
• Scalability when decompressing from/to regular files has been increased.
• The number of worker threads is now limited to the number of members in the input file when decompressing from a regular file.
• "configure" now accepts options with a separate argument.
• The targets "install-as-lzip" and "install-bin" have been added to the Makefile.

What is new in version 1.0 RC1:

• Scalability of compression (maximum number of useful worker threads) has been increased. Scalability when decompressing from/to regular files has been increased.
• The number of worker threads is now limited to the number of members in the input file when decompressing from a regular file. The target "install-as-lzip" has been added to the Makefile.

What is new in version 0.9:

• This version adds minor fixes and cleanups.
• The configure option "--datadir" has been renamed to "--datarootdir" to follow GNU Standards.

What is new in version 0.7:

• Match length limits set by options -1 to -9 have been changed to match those of lzip 1.11.
• A limit has been set on the number of packets produced by decompressor worker threads to limit the amount of memory used. Do not show the message "and `--stdout' was not specified" for file types that can't be read (directories, etc).
• A warning about fchown's return value being ignored has been fixed.