#!/bin/sh

# Compute how busy your cluster is.

IFS="   "

compute()
{
  {
    echo "scale=2"
    echo "up=0"
    echo "idle=0"
    echo "host=0"
    while read host up idle
    do
      echo "up=up+$up"
      echo "idle=idle+$idle"
      echo "host=host+1"
    done < /tmp/busy
    echo "busy=up-idle"
    echo 'print "up   = ", up/60/60/24, " days (", (up/60/60/24)/host, " days/node)\n"'
    echo 'print "idle = ", idle/60/60/24, " days (", (idle/60/60/24)/host, " days/node)\n"'
    echo 'print "busy ", busy/60/60, " hours: ", (busy*100)/up, "% busy\n"'
  } | bc
}

echo " All Nodes:"
echo ""

dsh -a "cat /proc/uptime" 1> /dev/null 2> /tmp/busy

compute