Compression notes Link to heading
There are different ways to compress in a linux environment with general compression algorithms and so.
Tar and GZIP Link to heading
tar:
GNU ’tar’ saves many files together into a single tape or disk archive, and can restore individual files from the archive.
gzip
Compress or uncompress FILEs (by default, compress FILES in-place).
Both are different tools, but tar can call bzip in order to compress an archived file.
Compression Link to heading
Currently exists a variaty of compression techniques and algorithms.
The popular ones:
gzip:
Compress or uncompress FILEs (by default, compress FILES in-place).
gzip2:
bzip2, a block-sorting file compressor. Version 1.0.8, 13-Jul-2019.
lzma / xz: Compress or decompress FILEs in the .xz format.
All of them supports the same preset of compressions which are from 1 (fast) to 9 (best).
Performance Link to heading
The features to consider while testing the performance are: Compression file size, Compression ratio and Comprestion time.
Basically a comparision between, gzip, gzip2 and lzma/xz
- gzip: compression ratio is low and compresion time is slow
- lzma: compression ratio is high and compression time is fast (decompression is very low, twice as gzip)
- bzip2: sits in the middle of gzip and lzma, it is a block-based compression