nagios监控hash目录的写效率

变态的需求：

 

  500*500的hash目录下有若干个文件，每次取10个文件模拟拷贝，计算出读的效率监控之。注意文件目录存在断层，比如可能/009/010根本不存在，要判断先。

 

#!/bin/sh

 

# author :expert1


#DATE:2011-01-28


# Usage: randomly get 10 files from 500*500 (000-499)hash directories,and copy them to tmp directory.


# thus calculate the time it consumes.


# NOTE:The 500 directories may not successive, in which case it has a breakpoint. e.g 000-100 120-499



############ define threshold #####



threshold=5 # suppose 5Mb/s



########### full path #####


fullpath=/tmp

destdir=/dev/null


touch num_10_$$ size.$$ time.$$


#### randomly get 10 numbers ###



 while [ `awk 'END{print NR}' $fullpath/num_10_$$ ` -lt 10 ];

   do

      tmp="${fullpath}/$((RANDOM%15))/$((RANDOM%15))"

     #tmp="$fullpath/$(printf "%03d/%03d" $((RANDOM%500)) $((RANDOM%500)))"


      [ -d $tmp ] && echo $tmp >>num_10_$$

   done


##### get time and size ;redirect to tmpfile #################



 for i in `cat $fullpath/num_10_$$` ;do

     for j in `find $i -type f |head -1`;do

       ls -l $j >>size.$$
       #注意time是bash的reserved word/metadata, 而且它的默认输出到std err,要redirect必须{;}这种方式()注意里面的；分号，或者subshell
       { time -p cp $j $destdir ;} >>$fullpath/time.$$ 2>&1

     done

 done

#### calculate the time and size of the test files ##############



 sum_time=$(awk '/real/{s+=$2}END{print s}' $fullpath/time.$$) # seconds


 size=$(awk '{s+=$5}END{print s/1024/1024}' $fullpath/size.$$) # Mb



 wrps=` awk 'BEGIN{print '$size'/'$sum_time' }'`


 rm -f num_10_$$ size.$$ time.$$

###### check low or high ####



if [ `echo "$wrps > $threshold" | bc` = 1 ]

   then echo " warnings,please check your disk immediately!!!!"

    exit 1

  else echo "hi,guy,it seems fine ,don't worry ^_^ "

  exit 0

fi