set terminal png size 1024,1024
set output "output.png"
set multiplot
set grid x y
set size 1,0.33
set key default
set xlabel "Date"
set ylabel "% IO"
set y2label "ops/sec"
set timefmt "%H:%M:%S"
set xdata time
set format x "%H:%M"
set tics out
set autoscale y
set autoscale y2
set origin 0.0, 0.66
plot 'io.txt' using 1:2 title "IO %" with lines axes x1y1, \
	'io.txt' using 1:3 title "r/s" with lines axes x1y2, \
	'io.txt' using 1:4 title "w/s" with lines axes x1y2
set origin 0.0, 0.33
plot 'io.txt' using 1:2 title "IO %" with lines axes x1y1
set origin 0.0, 0.0
set ylabel "ops/sec"
plot 'io.txt' using 1:3 title "r/s" with lines axes x1y1, \
	'io.txt' using 1:4 title "w/s" with lines axes x1y1
unset multiplot
#plot 'io.txt' using 1:3 title "r/sec" with lines
#plot 'io.txt' using 1:4 title "w/sec" with lines