NAME

tarlz - creates tar archives with multimember lzip compression

SYNOPSIS

tarlz [options] [files]

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 posix pax format compressed with lzip, keeping the alignment between tar members and lzip members. This method adds an indexed lzip layer on top of the tar archive, making it possible to decode the archive safely in parallel. 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 tarlz file format is a safe posix-style backup format. In case of corruption, tarlz can extract all the undamaged members from the tar.lz archive, skipping over the damaged members, just like the standard (uncompressed) tar. Moreover, the option '--keep-damaged' can be used to recover as much data as possible from each damaged member, and lziprecover can be used to recover some of the damaged members.

OPTIONS

-h, --help: display this help and exit
-V, --version: output version information and exit
-A, --concatenate: append tar.lz archives to the end of an archive
-B, --data-size=<bytes>: set target size of input data blocks [2x8=16 MiB]
-c, --create: create a new archive
-C, --directory=<dir>: change to directory <dir>
-d, --diff: find differences between archive and file system
--ignore-ids: ignore differences in owner and group IDs
-f, --file=<archive>: use archive file <archive>
-n, --threads=<n>: set number of (de)compression threads [2]
-q, --quiet: suppress all messages
-r, --append: append files to the end of an archive
-t, --list: list the contents of an archive
-v, --verbose: verbosely list files processed
-x, --extract: extract files from an archive
-0 .. -9: set compression level [default 6]
--uncompressed: don't compress the archive created
--asolid: create solidly compressed appendable archive
--bsolid: create per block compressed archive (default)
--dsolid: create per directory compressed archive
--no-solid: create per file compressed archive
--solid: create solidly compressed archive
--anonymous: equivalent to '--owner=root --group=root'
--owner=<owner>: use <owner> name/ID for files added
--group=<group>: use <group> name/ID for files added
--keep-damaged: don't delete partially extracted files
--missing-crc: exit with error status if missing extended CRC

Exit status: 0 for a normal exit, 1 for environmental problems (file not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an internal consistency error (eg, bug) which caused tarlz to panic.

REPORTING BUGS

Report bugs to lzip-bug@nongnu.org
Tarlz home page: http://www.nongnu.org/lzip/tarlz.html

COPYRIGHT