Making I/O graphs for a customer

datafart.bash

#!/bin/bash
#This Script parses the output of these two files
#iostat -N vg_backup-lv_backup 1 > iostat_output &
#cat iostat_output  | grep vg_backup-lv_backup >vg_only
#where vg_backup-lv_backup is the name of your lv  (see the names of you lvs here ls -l /dev/mapper/)


numlines=5000

geta() {
                a=()
                 while read -d $'\n'; do
                        a+=("$REPLY")
                 done < <(cat iostat_output  | grep -A2 iowait  | awk '{ print $4 }'  | sed 's,\,,,g' | grep -o '[0-9]*' | sed 's/.$//')
}
getb() {
                b=()
                 while read -d $'\n'; do
                        b+=("$REPLY")
                 done < <(head -n $numlines vg_only | awk '{ print $3 }' |sed 's/...$//')
}

getc() {
                c=()
                 while read -d $'\n'; do
                        c+=("$REPLY")
                 done < <(head -n $numlines vg_only | awk '{ print $4 }' |sed 's/...$//')
}

geta
getb
getc
while (( zz < $numlines ))

do
    echo "reads "${b[$zz]}" iowait  "${a[$zz]}" writes "${c[$zz]}""
(( zz++ ))
done

#Optional send the output to datafart (max 999 lines)

#alias datafart='curl --data-binary @- datafart.com'