View source for Linux/Compression tools

== benchmark ==
* Compressing 6144MB kvm image

{| class="wikitable sortable" border="1"
|-
! Command
! Arguments
! compressed size
! time
|-
| cat 
| > target
| 6144M
| 55.96s
|-
| pigz
| --best
| 1526M
| 259.65s
|-
| pigz
| --fast
| 1667M
| 28.06s
|}


* benchmark script
<blockquote>
<pre>
#!/bin/bash
COMPRESSCMD="pigz -9"
DESC="pigz-best"

START=$(date +%s.%N)
cat image.img | $COMPRESSCMD > /backup/$DESC.img.gz
END=$(date +%s.%N)
DIFF=$(echo "$END - $START" | bc)
echo "$DIFF" > /backup/$DESC.log
</pre> 
</blockquote>