测试串行、并发、读、写 4类操作，每类操作又可以指定各种bs及count值，循环压测。每种场景一般执行3次，取平均值。 

一、 串行写

#!/bin/sh
 
bs_list=(256k 1024k 10M 20M 50M 100M 1G)
cnt_list=(40000 10000 1000 500 200 100 10)
 
for i in {0..6}
do
 
for j in {0..2}
do
 
logfile=dd_${bs_list[$i]}_cnt${cnt_list[$i]}_${j}.txt
 
echo -e "test ${j} started\n" > $logfile
echo -e "started time `date`\n" >> $logfile
 
dd if=/dev/zero of=testfile1 bs=${bs_list[$i]} count=${cnt_list[$i]} oflag=direct,nonblock 2>> $logfile
 
echo -e "\nfinished time `date`" >> $logfile
echo -e "\ntest ${j} finished" >> $logfile
sleep 5
 
done
 
sleep 30
done

二、 4并发写

#!/bin/sh
 
# ddtest_write_conc.sh
 
bs_list=(256k 1024k 10M 20M 50M 100M 1G)
cnt_list=(40000 10000 1000 500 200 100 10)
 
for i in {0..6}
do
 
for j in {0..2}
do
 
logfile=dd_conc_${bs_list[$i]}_cnt${cnt_list[$i]}_${j}.txt
 
echo -e "test ${j} started\n" > $logfile
echo -e "started time `date`\n" >> $logfile
 
for conc in {0..3}
do
{
dd if=/dev/zero of=testfile1 bs=${bs_list[$i]} count=${cnt_list[$i]} oflag=direct,nonblock 2>> $logfile
} &
done
 
wait
 
echo -e "\nfinished time `date`" >> $logfile
echo -e "\ntest ${j} finished" >> $logfile
sleep 5
 
done
 
sleep 30
done

三、 串行读

 #!/bin/sh
 
# ddtest_read_serial.sh
 
bs_list=(256k 1024k 10M 20M 50M 100M 1G)
cnt_list=(40000 10000 1000 500 200 100 10)
 
for i in {0..6}
do
 
for j in {0..2}
do
 
logfile=dd_${bs_list[$i]}_cnt${cnt_list[$i]}_${j}.txt
 
echo -e "test ${j} started\n" > $logfile
echo -e "started time `date`\n" >> $logfile
 
dd if=testfile1 of=/dev/null bs=${bs_list[$i]} count=${cnt_list[$i]} iflag=direct,nonblock 2>> $logfile
 
echo -e "\nfinished time `date`" >> $logfile
echo -e "\ntest ${j} finished" >> $logfile
sleep 5
 
done
 
sleep 30
done

四、 4并发读

#!/bin/sh
 
bs_list=(256k 1024k 10M 20M 50M 100M 1G)
cnt_list=(40000 10000 1000 500 200 100 10)
 
for i in {0..6}
do
 
for j in {0..2}
do
 
logfile=dd_conc_${bs_list[$i]}_cnt${cnt_list[$i]}_${j}.txt
 
echo -e "test ${j} started\n" > $logfile
echo -e "started time `date`\n" >> $logfile
 
for conc in {0..3}
do
{
dd if=testfile1 of=/dev/null bs=${bs_list[$i]} count=${cnt_list[$i]} iflag=direct,nonblock 2>> $logfile
} &
done
 
wait
 
echo -e "\nfinished time `date`" >> $logfile
echo -e "\ntest ${j} finished" >> $logfile
sleep 5
 
done
 
sleep 30
done

五、 输出解析

取执行时间

cat dd_* | grep -E 'MB/s|GB/s' | awk '{ print $6 }'

取吞吐量

cat dd_* | grep -E 'MB/s|GB/s' | awk '{ print $8 }'