Experiment2:PerformanceEvaluationClassRoom:55-A-210ClassTime:2017/12/0818:00-21:00Inthisexperiment,youwilllearntoevaluatetheperformanceofonline/offlinecloudapplications.

Requirements:

1. TheMapreduceapplication(WordcountandSort)writteninExperiment1.2. TPC-W:itisane-commercewebsite,whichsupportsonlineshoppingandpayment. 3. ApacheJmeter:itisaweb-accessloadgenerator,andcanbeusedtogenerateaccessloadto

TPC-W.

Overview:

1. TPC-Whasbeeninstalledsuccessfullyinyourownvirtualmachine.Theonlythingyouneedto

doistostarttheserviceusingthefollowingcommand.

root@VM-0-15-ubuntu:~/tpcw/apache-tomcat-8.5.23/startup.sh

Note:youneedtochangetorootaccountusing“sudosu-”,thestartup.shscriptisindirectoryof

“/tpcw/apache-tomcat-8.5.23/”.

2. InstallandconfigureJmeterinyourownPC(SeeattachedApacheJmetermanual).

3. UseJmetertoaccessTPC-W,andgettheresponsetimedistributionofyouraccesses.

4. StartyourMapreduceapplication.MeasuretheperformanceofTPC-Wwhilemapreduce is

stillrunning.Then,gettheresponsetimedistributionagain.

5. Comparethetwodistributionsofresponsetimes,andanalyzetheirdifferencesusingfigures

andexplainthereason.

ApacheJmetermanual:

1. DownloadApacheJmeterhttp://jmeter.apache.org/download_jmeter.cgi

Softwarepackage:apache-jmeter-3.3.zipDecompressfile:apache-jmeter-3.3

2. Doubleclicktoopensoftware:apache-jmeter-3.3\bin\jmeter.bat

3. PliginManagerDownload:https://jmeter-plugins.org/downloads/all/

putthejarfileintolib/extdictionary,thenrestartJmeter.

Afterrestart,oneitemPluginsManagerisaddedintheoptionsdirectory,

Click enter Plugins Manager, we can see that there are some installed plugins andavailableplugins.

WechoosesomenewpluginsastheFigurebelowshown,thenapplychangesandrestart

jmeter.

4. Buildahttptestplan

Wecansavethetestplanandthenopenwiththejmxfile.(1) Addthreadgroup:AThreadGroupdefinesapoolofusersthatwillexecuteaparticular

testcaseagainstyourserver.

(2) Setthreadgroup

Wecansetloopcountorschedulertorunthethreadgroup.

(3) Addsample

(4) Sethttpsample

Hereweaccesstheindexpage.WeneedtosettheIP,portnumber,andpathasbelow.Youcanalsochoosetoaccesstheotherpages,forexampletheproductlistpage,whichisassociatedwithdatabasereading.

(5) Addlistener

Hereweaddlistenerasbelow.Theresultsoftestwillbeshowninfiguresandtables.

Youcanlearntheselistenersthroughhelpfile.

Also,theresultscanbestoredinfiles.Thetypeoffilescanbe.csvand.xmletc.Andtheitemsstoredinfilesarethoseshowninfigurebelow.Themeaningoftheseitemsarealsocanbefoundinhelpfile.

Finally,wecanrunthetest.