OpenSTA overview

Estimated time: 90 mins

Objectives

Present the basic of OpenSTA for load testing web applications

Things you will learn:1. OpenSTA capabilities

2. Basic scripting, modeling

History of OpenSTA Overview performance terminologies Overview OpenSTA terminologies OpenSTA capabilities Download and install Component and process of using How does OpenSTA work? Script modeler Commander Directory structure Example

Outlines

History of OpenSTA

Was written by Cyrano, a French company Base on CORBA It is Open Source software license under the GNU General

Public license Source code is available at http://opensta.sourceforge.net

Performance terminologies

Performance testing is testing a system under load to determine or validate:

The speed Stability Scalability Confident

Performance terminologies

Stress testing is a type of performance test

To validate application’s behavior under load conditions

Performance terminologies

Load testing is a type of performance testing

To verify the system under load conditions.

Performance terminologies

Response time: how responsive an application to a client request

Think time: time client use to think before next request

Throughput: number of units of work that can be handle per unit of times (ex: request per second)

Workload: include total number of users, concurrent active users, data volumes, …

…

OpenSTA terminologies

OpenSTA: Open system testing architect

Component: Script modeller: create and edit script Commander: create and run test Name server: manage distributed machine

Concept: Virtual user: each virtual user runs on a separate

thread

History of OpenSTA Overview performance terminologies Overview OpenSTA terminologies OpenSTA capabilities Download and install Component and process of using How does OpenSTA work? Script modeler Commander Directory structure Example

Outlines

OpenSTA capabilities

Protocols support:• Http and https

Functionalities• Script development: correlation, reading from file, high level

coding language, …• Test execution, Debugger: slow refresh on summary, not good

debugger• Result analysis: must do in Excel

Robustness:• Create realistic heavy loads• Sometimes hangs, crashes

Download and install

http://www.opensta.org/download.html

Component and process

Modeler: record script, edit, make correlation, parameterizing, ….

Commander: define load scenario, configure test, …

Excel: analyze the result

Modeler

Commander

Excel

How does OpenSTA work?

History of OpenSTA Overview performance terminologies Overview OpenSTA terminologies OpenSTA capabilities Download and install Component and process of using How does OpenSTA work? Script modeler Commander Directory structure Example

Outlines

Script modeller

Script modeller

Good variable management• Different variable scope• Variable generation• Random or sequential list

Commander

Commander

Create tests• Determine how to generate load• One or more tasks per task group• Configure start and end setting, total virtual users and ramp up,

machine to run on for each task group

Directory structure

Example

A QC want to to test “there are 10 users click the link at the same time”

Objectives

Present the basic of OpenSTA for load testing web applications

Things you will learn:

1. OpenSTA capabilities

2. Basic scripting, modeling

One page summary

Thank you!!!