Shell腳步之監控iostat數據

在性能測試中，進行iostat監控數據顯示太不美觀，看起來很痛苦，如下圖 為了顯示美觀，寫個shell腳本進行改造，如下：

#! /bin/bash


interval=1
if [ $# -gt 0 ]; then
  interval=$1
fi



while (true) do    iostat -k; sleep $interval; done | awk '

BEGIN{
    data_flag = 0;
    
    sum_tps = 0;
    sum_read_kb_speed = 0;
    sum_write_kb_speed = 0;
    sum_read_kb = 0;
    sum_write_kb = 0;    
    
}

{    
    if ( $1 == "Device:")
    {
        data_flag = 1;
        #print "+ " $0
        
    }
    else if ( NF == 0 )
    {
        if (data_flag == 1)
        {
            printf("%s tps %6.2f kB_read/s %10.2f kB_write/s %10.2f kB_read %14d kB_write %14d\n", 
                strftime("%D %H:%M:%S"),
                sum_tps,
                sum_read_kb_speed,
                sum_write_kb_speed,
                sum_read_kb,
                sum_write_kb);
    
            data_flag = 0;
    
            sum_tps = 0;
            sum_read_kb_speed = 0;
            sum_write_kb_speed = 0;
            sum_read_kb = 0;
            sum_write_kb = 0;
            
            #print "- " $0
        }
        else
        {
            #print "= " $0
        }
        #data_flag=0;
    }
    else
    {
        if (data_flag == 1)
        {
            #print "1 " $0;
            
            tps = $2;
            read_kb_speed = $3;
            write_kb_speed = $4;
            read_kb = $5;
            write_kb = $6;
            
            sum_tps += tps;
            sum_read_kb_speed += read_kb_speed;
            sum_write_kb_speed += write_kb_speed;
            sum_read_kb += read_kb;
            sum_write_kb += write_kb;
            
            
        }
        else
        {
            #print "0 " $0;
        }
    }    
}

END{

}

運行後效果如下： 是不是顯示好多了。且有時間顯示，這樣定入log後定位問題方便很多