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- recompresses all gz files to bz2 files from this point and below in the directory tree
- output shows the size of the original file, and the size of the new file. Useful.
- conceptually easier to understand than playing tricks with awk and sed.
- don't like output? Use the following line:
for gz in `find . -type f -name '*.gz' -print`; do f=`basename $gz .gz` && d=`dirname $gz` && gunzip -c $gz | bzip2 - -c > $d/$f.bz2 && rm -f $gz ; done
Find all .gz files and recompress them to bz2 on the fly. No temp files.
edit: forgot the double quotes! jeez!
To also move the db backup to another location you could pass the output to the dd command instead of a file
mysqldump -u user -h host -ppwd -B dbname | bzip2 -zc9 | dd ssh usr@server "dd of=db_dump"
Avoids creating useless directory entries in archive, and sorts files by (roughly) extension, which is likely to group similar files together for better compression. 1%-5% improvement.
See: http://imgur.com/JgjK2.png for example.
Do some serious benchmarking from the commandline. This will write to a file with the time it took to compress n bytes to the file (increasing by 1).
gnuplot -persist <(echo "plot 'lzma' with lines, 'gzip' with lines, 'bzip2' with lines")
To see it in graph form.
Just copy and paste the code in your terminal.
Note : sudo apt-get for debian versions , change as per your requirement .
Source : www.h3manth.com
Does that count as a win for bzip2?