This document was written with the assumption that CentOS 6.5 will be used.

Host systems involved in this test.
tsung client system: client01.lab.net
web server being load tested: web01.lab.net

STEP 1. Add he following repositories to client01.lab.net, these are the Extra Packages for Enterprise Linux 6 repositories.

vim /etc/yum.repos.d/epel.repo

[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 6 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug
mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 6 - $basearch - Source
#baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS
mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
gpgcheck=1

STEP 2. Install tsung load testing software

yum install tsung

STEP 3. Create a .tsung directory under the user’s home folder which you will launch tsung from.

su testuser
vim /home/testuser/.tsung/tsung.xml

STEP 4. Create the following XML file, by entering the xml below into the tsung.xml file
Update the system names in the SERVER and CLIENT tags. Also update the URL in the REQUEST tag to match your environment. Using this configuration I was able to fully utilize four IIS web servers in a load test.

<?xml version="1.0"?>
<!DOCTYPE tsung SYSTEM "/usr/share/tsung/tsung-1.0.dtd">
<tsung loglevel="notice" version="1.0">

<clients>
        <client host="client01.lab.net" weight="1" cpu="10" maxusers="40000">
                <ip value="172.16.1.20"/>
        </client>
</clients>

<servers>
      <server host="wauweb01.lab.net" port="443" type="ssl"/>
</servers>

  <load>
     <arrivalphase phase="1" duration="10" unit="minute">
        <users maxnumber="15000" arrivalrate="8" unit="second"/>
          </arrivalphase>

   <arrivalphase phase="2" duration="10" unit="minute">
      <users maxnumber="15000" arrivalrate="8" unit="second"/>
        </arrivalphase>

   <arrivalphase phase="3" duration="30" unit="minute">
      <users maxnumber="20000" arrivalrate="3" unit="second"/>
        </arrivalphase>

 </load>

 <sessions>
    <session probability="100" name="ab" type="ts_http">
           <for from="1" to="10000000" var="i">
                       <request> <http url="/webservice/test.svc?wsdl" method="GET" version="1.1"/> 
                       </request>
           </for>
     </session>
   </sessions>
</tsung>

STEP 5. On the client system start tsung, under the user which you configured the tsung.xml file

tsung start