I want to use 100 concurrent users in one thread group in Jmeter. but I want to each thread to use different user login password. how to achieve that?
full credit to Apache Jmeter documentation:
Some test plans need to use different values for different users/threads. For example, you might want to test a sequence that requires a unique login for each user. This is easy to achieve with the facilities provided by JMeter.
For example:
Create a text file containing the user names and passwords, separated by commas. Put this in the same directory as your test plan.
Add a CSV DataSet configuration element to the test plan. Name the variables USER and PASS.
Replace the login name with ${USER} and the password with ${PASS} on the appropriate samplers
The CSV Data Set element will read a new line for each thread.
UPDATE documentation link
https://jmeter.apache.org/usermanual/best-practices.html
There are multiple options depending on where do you want to keep the credentials.
The most commonly used approach is storing login/password combinations in the CSV file and using CSV Data Set Config for reading them. By default each JMeter thread will read the next line from the file on each iteration
If your credentials are in the database you can use JDBC PreProcessor
If you plan to run your test in Distributed Mode and don't want to worry about copying test data to all slave machines - there are HTTP Simple Table Server and Redis Data Set Config
More information: JMeter Parameterization - The Complete Guide
Related
I have a script which has Login API which fetch the first values from CSV file after other API's run which should run with the same user, after running all the API in thread again it should fetch the second value from csv.
I have done with the entire setup but while running the script it's randomly fetch the value from csv
assuming you are using multiple Thread Group. if yes then look for sharing mode in CSV Data Set Config. link with help you to understand sharing mode
https://www.blazemeter.com/blog/csv-data-set-config-in-sharing-mode-made-easy
For Single Thread Group use sharing mode as Current thread in CSV Data Set Config
I am a Load Runner tester and would like to know how below requirements can be done in Jmeter.
Data parameterization - How can we implement unique and random data parameterization in Jmeter.
how do we get vuser id value for each virtual users in a Thread group?
If we need to initialize/load any data during vuser initialization (vuser_init() in load Runner) , how can we do it? Also, how do we call any function when vuser is ending, like vusr_end() in LoadRunner.
In Core JMeter:
For Data parameterization, use CSV DataSet , it will pick columns from CSV file and expose them as JMeter Variables you can use with ${varName}
To get user id, use jmeter function __threadNum()
There is no strict equivalent, for vuser_init you can use a Once Only Controller. For vuser_end, there is no equivalent
For parameterization:
CSV Data Set Config - for sequential data
Random CSV Data Set Config - for random data
HTTP Simple Table Server - for unique and random data, suitable for Distributed Testing (basically equivalent of the Virtual Table Server)
__threadNum()
Normally it is being done in:
vuser_init() - setUp Thread Group
vuser_end() - tearDown Thread Group
I have a JDBC test suite that I run with JMeter, and I want to run that over many user accounts.
I'm doing that with a CSV dataset that includes all the accountIds I want to test, then I inject the accountId into my SQL queries to run the queries over all of the accounts I want to test (with ${ACCOUNTID}).
It's working great, the queries are actually done over all the accounts I want to test.
However, I would like to know the response time per account. Currently I'm not getting the accountId back in the result, so I can't filter my results by account. Is there a way to get that variable value to the JTL?
You can either run JMeter as follows:
jmeter -Jsample_variables=ACCOUNTID -n -t test.jmx -l result.jtl
Or add the next line to user.properties file to make the change permanent
sample_variables=ACCOUNTID
In both cases you will get an extra column in .jtl results file having ACCOUNTID variable value for each and every request.
More information:
Sample Variables
JMeter Properties Reference
Apache JMeter Properties Customization Guide
You can add variable name to Sampler name so it will aggregate requests per account id. Set Sampler as:
My Sampler ${ACCOUNTID}
How to login multiple users with different input in different threads in Jmeter using CSV data set config?
I have added CSV data set config but the thread is picking only the first entry and i m not able to see the responses for other user login
If you use CSV data set config which contains parameterized values which users(threads) will use while running script.
below is snapshot of jmeter of csv data set config which contain emp.csv file which contains values like,
nachiket,101,test
nikhil,102,test
harish,103,test
which are empname,empid,passwd respectively for 3 users.
if you run test with 3 users then thread1 will pick first and 2nd thread will pick 2nd val so on and you can repeat the file if it has less values than no of threads.
You need to provide enough loops/iterations as given one iteration only CSV Data Set Config will read only the first entry.
Try putting the request you want to parametrize under a Loop Controller, set enough loops and see whether it resolves your issue.
See Using CSV DATA SET CONFIG guide for more details.
I want to simulate a few hundred http request each with a different token and userId which I have in a database table.
What's the best way of setting up a jMeter load test to do this?
You can use JDBC Sampler to extract you data from DB to create a CSV and a JSR223 Sampler using groovy (add groovy-all.jar in jmeter/lib folder) to write the extracted values to a CSV file.
Then in the real plan , use CSV DataSet Config using the generated file.
Depending on how you want to use the dataset, you will play with Sharing mode attribute.
If you want to do both steps within the same plan you can use a Setup thread Group that will contain the JDBC Sampler part to write the CSV File, this will use 1 thread and then
the other part in regular Thread Group that will use the number of users you need.
One way is to put all your parameters into a csv file and use CSV Data Set Config in jmeter. Right click on the thread you have created - add- Config Element- CSV Data Set Config. Remember you need to set the Number of Threads(users) to match the number of users in your CSV file.