Shell starts another script for statistics. awk adds the current time in each row

Control script,

Stat. Sh

PID_NUM=$$PID_FILE=stat.pid#echo "pid : "$PID_NUMPROG_NAME=$0ACTION=$1usage() {    echo "Usage: ${PROG_NAME} {start|stop|restart}"    exit 1;}start(){    sh ./stat_run.sh &    PID_NUM=$!    echo "worker pid is " $PID_NUM    echo ${PID_NUM} > ${PID_FILE}}stop(){    PID_NUM=`cat ${PID_FILE}`    if [ "" != "${PID_NUM}" ]; then        echo kill pid is "${PID_NUM}"                kill ${PID_NUM}    fi}case "${ACTION}" in    start)        start    ;;    stop)        stop    ;;    restart)        stop        sleep 1        start    ;;    *)        usage    ;;esac

$ Indicates the PID of the currently running process, $! Indicates the PID of the last process.

Script for running the statistics program

cat stat_run.sh     STAT_FILE=stat_delay.log    echo "" > $STAT_FILE    while true; do         tail -n10000 perf.log | awk '{print $8}' | grep totalAll | awk -F, 'BEGIN {cnt=0;total=0} {cnt=cnt+1;total=total+$3} END{print '"\"$(date  +%Y-%m-%d-%H:%M:%S)\""', total/cnt}' >> $STAT_FILE;        sleep 5;    done;

In the preceding script, the average value of the latest 10000 records is calculated every five seconds.

Print the current time on each line in the awk

[admin@v021130.sqa.cm4 logs]$ cat test.log 2013-07-30-23:00:12 44.57912013-07-30-23:00:17 44.57912013-07-30-23:00:22 44.57912013-07-30-23:00:27 44.57912013-07-30-23:00:32 44.57912013-07-30-23:00:37 44.57912013-07-30-23:00:42 44.57912013-07-30-23:00:47 44.57912013-07-30-23:00:52 44.57912013-07-30-23:00:58 44.5791[admin@v021130.sqa.cm4 logs]$ awk '{print '"\"$(date  +%Y-%m-%d-%H:%M:%S)\""', $1}' test.log           2013-07-30-23:01:21 2013-07-30-23:00:122013-07-30-23:01:21 2013-07-30-23:00:172013-07-30-23:01:21 2013-07-30-23:00:222013-07-30-23:01:21 2013-07-30-23:00:272013-07-30-23:01:21 2013-07-30-23:00:322013-07-30-23:01:21 2013-07-30-23:00:372013-07-30-23:01:21 2013-07-30-23:00:422013-07-30-23:01:21 2013-07-30-23:00:472013-07-30-23:01:21 2013-07-30-23:00:522013-07-30-23:01:21 2013-07-30-23:00:58[admin@v021130.sqa.cm4 logs]$ awk '{print '"\"$(date  +%Y-%m-%d-%H:%M:%S)\""', $2}' test.log  2013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.57912013-07-30-23:01:27 44.5791