Linux/Compression tools

benchmark

• Compressing 6144MB kvm image

Command	Arguments	compressed size	time
pigz	--best	1526M	259.65s
pigz	--fast	1667M	28.06s

• benchmark script

#!/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