tarlz is a massively parallel (multi-threaded) combined implementation of the tar archiver and the lzip compressor. Tarlz uses the compression library lzlib.
tarlz creates, lists, and extracts archives in 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 it possible to decode the archive safely in parallel. It also minimizes the amount of data lost in case of corruption.
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.
This is free and open source software.
Website: www.nongnu.org/lzip
Support: Manual
Developer: Antonio Diaz Diaz
License: GNU General Public License v2.0

tarlz is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Terminal-Based Archive Managers | |
|---|---|
| DAR | Disk ARchive: Backup directory tree and files |
| tar | A file archiver and archive format developed since the early days of Unix |
| zpaqfranz | Deduplicating archiver with encryption and paranoid-level tests |
| patool | Portable archive file manager |
| tarlz | Massively parallel combined implementation of tar and lzip |
| TUI Archiver | Terminal application to list / manage archives |
| Simple Archiver | Fairly wide range of features |
| tarnation | Simple, extensible tar backup/restore utility |
Read our verdict in the software roundup.
| Alternatives to tar | |
|---|---|
| TUI Archiver | List / manage archives |
| tarlz | Massively parallel combined implementation of tar and lzip |
| tarnation | Simple, extensible tar backup/restore utility |
| patool | Portable archive file manager that focuses on simplicity |
| zpaqfranz | Deduplicating archiver with encryption and paranoid-level tests |
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