to download the JMETER Tool just click on the following Link

Start JMeter by launching the jmeter.bat file on Windows or jmeter file on Unix/Linux from the JMeter bin directory.

JMeter : is a free  Streess Testing tool operate as desktop and command line application , it is a pure java application , designed to load test functional behavior and measure performance .It was originally designed to test Web Applications but has since expanded to other test functions to become main server load test tool, Jmeter Can load and performance test many different server types , such as (Web - HTTP, HTTPS, SOAP, Database via JDBC, LDAP, JMS, Mail - POP3... and much more )..

    In this section, you will learn how to create a basic Test Plan to test an FTP site. You will create four users that send requests for two files on the O'Reilly FTP site.

 7. Building a Database Test Plan

    In this section, you will learn how to create a basic Test Plan to test a database server. You will create ten users that send five SQL requests to the database server. Also, you will tell the users to run their tests three times. So, the total number of requests is (10 users) x (2 requests) x (repeat 3 times) = 60 JDBC requests. To construct the Test Plan, you will use the following elements: Thread Group , JDBC Request , Graph Results .

 5. Building a Web Test Plan

    In this section, you will learn how to create a basic Test Plan to test a Web site. You will create five users that send requests to two pages on the Jakarta Web site. Also, you will tell the users to run their tests twice. So, the total number of requests is (5 users) x (2 requests) x (repeat 2 times) = 20 HTTP requests. To construct the Test Plan, you will use the following elements: Thread Group , HTTP Request , HTTP Request Defaults , and Graph Results .

 4. Elements of a Test Plan

    The Test Plan object has a checkbox called "Functional Testing". If selected, it will cause JMeter to record the data returned from the server for each sample. If you have selected a file in your test listeners, this data will be written to file. This can be useful if you are doing a small run to ensure that JMeter is configured correctly, and that your server is returning the expected results. The consequence is that the file will grow huge quickly, and JMeter's performance will suffer. This option should be off if you are doing stress-testing (it is off by default).

 3. Building a Test Plan

    A test plan describes a series of steps JMeter will execute when run. A complete test plan will consist of one or more Thread Groups, logic conrollers, sample generating controllers, listeners, timers, assertions, and configuration elements.

2.Getting Started   

The easiest way to begin using JMeter is to first download the latest production release and install it. The release contains all of the files you need to build and run most types of tests, e.g. Web (HTTP/HTTPS), FTP, JDBC, LDAP, Java, and JUnit.

 Apache JMeter is a 100% pure Java desktop application designed to load test client/server software (such as a web application ). It may be used to test performance both on static and dynamic resources such as static files, Java Servlets , CGI scripts, Java objects, databases , FTP servers , and more. JMeter can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types.