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#! /bin/sh
#=================================================================
#
# I/O Checker (KBPS)
# This Script uses iostat to monitor disk io
# Useful for notifications of disk thrashing.
#
# Authors: TheRocker
# SpEnTBoY
#
# Email: therocker@pawprints.2y.net
# lonny@abyss.za.org
#
#================================================================
NUMBER1=`rsh $1 -l root iostat -d | grep -e "hdisk" | tr -s ' ' | cut -d' ' -f2 | sort -2 -r | cut -c1 | line`
NUMBER2=`rsh $1 -l root iostat -d | grep -e "hdisk" | tr -s ' ' | cut -d' ' -f2 | sort -2 -r | cut -c2 | line`
TMPFILE=/tmp/iotest.hndl
TMPTOO=/tmp/iotwo.hndl
#===========================================================
#
# We do an evaluation on $NUMBER1 and $NUMBER2 to see if
# disk io is exceeding 40%.
#
#===========================================================
if [ "$NUMBER1" -gt 4 ] && [ "$NUMBER2" -gt 0 ]
then
`rsh $1 -l root iostat -d | grep -v cd0 | tr -s ' '| cut -d' ' -f1,2 | grep -e "4[0-9]." >> $TMPFILE`
#====================================================================
#
# Of course, there may be more than one hard disk on the node
# so we use this bit of code to report on more than one instance
# of excessive disk IO.
#
#====================================================================
LINES=`wc -l /tmp/iotest.hndl | cut -c8`
LINESCTL=`wc -l /tmp/iotest.hndl | cut -c8 `
echo "WARNING!!! Disk I/O Exceeding 40% on --> \c"
while [ $LINESCTL != 0 ]
do
cat $TMPFILE | tail -$LINESCTL > $TMPTOO
cat $TMPTOO > $TMPFILE
LINESCTL=$(( $LINESCTL -1 ))
LINES=$(( $LINES -1 ))
DATA=`head -1 /tmp/iotest.hndl`
echo "( $DATA ) "
done
echo "\n"
rm -f $TMPFILE
rm -f $TMPTOO
exit 1
else
print "No Disk I/O Exceeding 40%...OK"
exit 0
fi
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