JMeter -- silent operation

Silent piezometry

• The significance of silent pressure measurement

• In the high concurrent pressure test scenario , In order to reduce the influence of pressure measuring tools on the pressure measuring machine , Silence is generally used （ No interface ） Pressure measurement mode
• Silent pressure measurement , You can modify the script , Achieve the effect of automatic pressure measurement

• jmeter Argument parsing

 jmeter -n -t *.jmx -l test1.jtl -e -o report1/ -r

  Argument parsing ：
	-n: Not GUI Mode execution Jmeter   
	-t: The location and file name of the execution test file    
	-l: Specifies the save file for generating test results ,jtl File format  
	-j: Specify the log path , If the path does not exist, it will be created automatically   
	-e: After the test , Generate test reports   
	-o: Specify the storage location of the test report , And the folder must be empty  
	-g: Specify the test result file path , Only used to generate test reports , Parameter is csv Results file  
	-r: Start all at remote_hosts Configured pressure measuring machine 
	-R: Start at remote_hosts Configured and specified ip Pressure gauge of , grammar ： -R IP1,IP2,IP3

• Generate test report according to test results

• The report can be generated directly after the pressure test , A separate report can also be generated based on the pressure test results

#  Run silently and generate test results 
jmeter -n -t demo.jmx -l td01.jtl

#  Generate according to the test results html Test report 
mkdir report1 && jmeter -g td01.jtl -o report1

Operation priority

• jmeter Running with Control the number of cycles Operation and Control duration function 2 Patterns
• priority ： Cycle by number > According to the scheduler time > Forever cycle
  • After setting the number of times, run according to the number of cycles , Other settings are invalid
  • When the number of cycles is not set , After the script is saved, always... Is checked by default , When running, it will continue to run
  • When the number of cycles is not set , Check the scheduler , Duration is required , Run continuously at the set time

Parametric operation

• Parameterization

• The number of concurrent is set to ${__P(concurrent_number,1)}, Default 1 Concurrent users
• The number of cycles is set to ${__P(cycles,1)}, Default 1 Cycle
• The execution time is set to ${__P(duration,60)}, Default 60s
• If the number of cycles and the execution time are set at the same time , Number of priority cycles . Therefore, it is necessary to run according to the duration , You need to remove the setting of the number of cycles

• Parametric operation

 jmeter -n -t demo1.jmx -Jconcurrent_number=8 -Jduration=60 -Jcycles=2

Automatic operation

• Thread group script

• Parameterized scripts

#! /bin/bash

#  The number of concurrency in the pressure test script ：thread_num, The pressure measurement time should be 10 second 
export jmx_template="demo"
export suffix=".jmx"
export jmx_template_filename="${jmx_template}${suffix}"
export os_type=`uname`
export wait_time=10

#  You need to define... In the system variable jmeter The location of the root directory , as follows 
export jmeter_path="/Users/whtest/package/apache-jmeter-5.4.3"

echo " Automatic pressure measurement begins "

#  List of pressure measurement concurrency 
thread_number_array=(10 20 30)
for num in "${thread_number_array[@]}"
do
    echo "============================================================"
    echo "${num} Thread pressure test starts "
    #  Generate the jmx file 
    export jmx_filename="${jmx_template}_${num}${suffix}"
    export jtl_filename="test_${num}.jtl"
    export web_report_path_name="web_${num}"

    rm -f ${jmx_filename} ${jtl_filename}
    rm -rf ${web_report_path_name}

    cp ${jmx_template_filename} ${jmx_filename}
    echo " Generate jmx Pressure test script  ${jmx_filename}"

    if [[ "${os_type}" == "Darwin" ]]; then
        sed -i "" "s/thread_num/${num}/g" ${jmx_filename}
    else
        sed -i "s/thread_num/${num}/g" ${jmx_filename}
    fi

    # JMeter  Silent piezometry 
    ${jmeter_path}/bin/jmeter -n -t ${jmx_filename} -l ${jtl_filename}

    #  Generate Web Pressure test report 
    ${jmeter_path}/bin/jmeter -g ${jtl_filename} -e -o ${web_report_path_name}

    rm -f ${jmx_filename} ${jtl_filename}

	#  Wait after the pressure test , Time is set according to specific needs 
    if [ ${num} -ne 30 ];then
        echo "${num} End of thread pressure test , wait for ${wait_time}s"
        sleep ${wait_time}
        echo "============================================================"
    else
        echo "${num} End of thread pressure test "
        echo "============================================================"
    fi
done
echo " The automatic pressure test is all over "