Creating unique threads within a Thread Group

I am in the process of testing the log-in functionality of a website. Ideally I wish to create a Thread Group that consists of a 100 threads. Each one of these threads would represent a unique user attempting to log-in to the website and perform some basic activities.

I have been unsuccessful in devising a way for ma开发者_如何学运维king the threads created in a thread group to represent a unique user. The problem is each time a thread is created it is created as a 'clone' of the first thread created from the Thread Group. As a result, I cannot configure thread 2 to have a different username/pw than thread 1 because when thread 2 is created JMeter does not know that it is thread 2.

I think that the solution lies in creating some JMETER properties (instead of variables) that maintains its state between threads of the Thread Group. However, I do not know how to go about implementing this.

any tips or ideas?

thanks.

First way: use CSV Data Set for login/password specification

Second way: use ${__threadNum} function to get number of thread in your samplers and use user1, user2, user3 etc. as usernames if applicable