perl学习(9) 实例：取出操作时间最长的100个记录

需求描述：

日志记录了一次操作的时间,即server端接收包到发送结果到client端的时间，取出操作时间最长的100个记录。

日志信息片段：

[2013-09-13 15:23:50,445.500] [47028700024080] FATAL – socket = 9
[2013-09-13 15:23:50,446.156] [47028700024080] FATAL – a client connected with ip: 10.10.10.127, name: <unknown>, port: 2314
[2013-09-13 15:23:50,447.375] [1103333696] INFO  – recv: with 64 bytes from 10.10.10.127.
[2013-09-13 15:23:50,449.461] [1103333696] INFO  – send: 1 with 1 bytes.

………

[root@sjs_131_126 analyse_time]# cat sort.sh

#!/bin/sh
#cat $1 | perl split.pl
grep -n 'FATAL - socket\|INFO  - send:' $1 |awk -F']' '{print $1 $3}'|awk -F'[' '{print  $1 "\t"t$2}'> result1.txt
echo "result1 success!" ./analyze.pl result1.txt
echo "result2 success!"
#
cat result2.txt | sort -t: -r | head -100 >result.txt
echo "success!"

说明：

1.第一步，将开始和结束的日志提取到result1.txt

2.第二步，通过analyze.pl计算每次操作的时间写入result2.txt

3.第三步，排序取出前100条

[root@sjs_131_126 analyse_time]# cat analyze.pl

#!/usr/bin/perl -w
use strict;
use warnings ;
use Time::Local;open FD1, ">> result_error.txt" ;
open FD2, ">> result2.txt";my $need_end = 0;
my ($second, $minute, $hour, $date, $month, $year);my $begin = 0;
my $end = 0;
my $begin_time = 0;
my $end_time = 0;#sample
#6653:   2013-09-11 15:04:35,815.499 FATAL - socket = 8
#6656:   2013-09-11 15:04:35,821.075 INFO  - send: 1 with 1 bytes.
while(<>)
{
        chomp ;
        if($need_end == 0)
        {
                if(/(\d+):\t(\d+)-(\d+)-(\d+)\s(\d+):(\d+):(\d+),.*\s(INFO|FATAL).*/s)
                {
                        if($8 eq "FATAL")
                        {
                                $begin = $1;
                                $need_end = 1;
                                ($second, $minute, $hour, $date, $month, $year) = ($7, $6, $5, $4, $3 - 1, $2 - 1900);
                                $begin_time = timelocal($second, $minute, $hour, $date, $month, $year);
                                #print "$year-$month-$date $hour:$minute:$second\n"
                        }
                        else
                        {
                                print FD1  "$_\n" ;
                                $need_end = 0 ;
                        }
                }
                else
                {
                        die  "match error\n" ;
                }
        }
        elsif($need_end == 1)
        {
                if(/(\d+):\t(\d+)-(\d+)-(\d+)\s(\d+):(\d+):(\d+),.*\s(INFO|FATAL).*/s)
                {
                        $end = $1;
                        if( $end == $begin + 3 && $8 eq "INFO")
                        {
                                $end = $1;
                                $need_end = 0;
                                ($second, $minute, $hour, $date, $month, $year) = ($7, $6, $5, $4, $3 - 1, $2 - 1900);
                                $end_time = timelocal($second, $minute, $hour, $date, $month, $year);
                                my $duration = $end_time - $begin_time;
                                print FD2 "$duration:[$begin to $end]\n";
                        }
                        else
                        {
                                $need_end = 0 ;
                                print FD1  "$_\n" ;                        }
                }
        }
        else
        {
                die  "control error\n" ;
        }
}