pv – monitor the progress of data through a pipe

pv allows a user to see the progress of data through a pipeline, by giving information such as time elapsed, percentage completed (with progress bar), current throughput rate, total data transferred, and ETA.


Utilizing multiple processor cores for faster TAR compressing on Linuxes.

From the forum http://www.linuxquestions.org/questions/linux-software-2/utilizing-multi-core-for-tar-gzip-bzip-compression-decompression-4175426075/

The gzip command itself is single threaded, but you can replace it on system with pigz, or provide extra arguments to the ‘tar’ command itself, which will give you a significant speed-up..

From the tar manpage:

-I, --use-compress-program PROG
      filter through PROG (must accept -d)

So, typical tar options to compress and extract files with tar plus pigz might be…

tar -I pigz -cf test.tar.gz *

tar -I pigz -xf test.tar.gz

Happy compressing!