nixCraft

ssh user@server1 uptime
ssh user@server2 uptime
ssh user@server3 uptime

server 1 4 users, load average: 0.06, 0.08, 0.09
server 2 4 users, load average: 0.06, 0.08, 0.07
server 3 4 users, load average: 0.01, 0.01, 0.01

#!/bin/sh
F="server 1 4 users, load average: 0.06, 0.08, 0.09"
F1="server 2 4 users, load average: 0.06, 0.08, 0.07"
F2="server 3 4 users, load average: 0.01, 0.01, 0.01"

# get server load i.e. 0.09, 0.07 and 0.01 in S1, S2, S3
S1=$(echo $F | awk '{ print $9}')
S2=$(echo $F1 | awk '{ print $9}')
S3=$(echo $F2 | awk '{ print $9}')

# now compare S1 load with S2 and S3
T=$(echo "$S1 < $S2 && $S1 < $S3" | bc)
if [ $T -eq 1 ]; then # if result is TRUE, then this is the best server to run application
  echo "Server1 is the best to run"
  exit 0
fi

T=$(echo "$S2 < $S1 && $S2 < $S3" | bc)
if [ $T -eq 1 ]; then
  echo "Server2 is the best to run"
  exit 0
fi

T=$(echo "$S3 < $S2 && $S3 < $S1" | bc)
if [ $T -eq 1 ]; then
  echo "Server3 is the best to run"
  exit 0
fi