It is often the one and only way to find the performance issues before release. We are happy to help with UI, API or performance testing, retrofitting tests to existing project, and enable you to do BDD! This is the fifth article of a series on performance testing with Locust. Locust is an easy to use, scriptable and scalable performance testing tool. This is the fifth article of a series on performance testing with Locust. There are many tools out there such as JMeter, Gatling, Postman or any of the dozens of applications you can buy. When we have started the ownCloud docker container, it created an database and for that it used SQlite database, that is good for quick testing and evaluation, but its soooo slow. Locust is an easy-to-use, distributed, user load testing tool. In this article we will be talking about distributed load testing using Locust or in simple terms Master-Slave load testing using Locust [1]. I have named the same script as master.py. Built on Forem — the open source software that powers DEV and other inclusive communities. Copyright 2020 MyGate. We can e.g. And there is a "bump" in the 95th percentile line every time new users are created. Learn Python based Modern Load Testing Framework ! Locust is an open source performance testing tool which allows you to write performance test scripts in Python. Currently this will be 0 because we have not added slaves to the master. Made with love and Ruby on Rails. Also have a look at the "Total Requests per Second" graph. Preparations In the first part of this series we talked about creating a very basic locust performance test… I'm not really testing the performance of ownCloud (or not alone). Performance Testing là một loại kiểm thá»­ nhằm xác định khả năng đáp ứng tối đa, các điểm tắc nghẽn của một hệ thống, từ đó đưa ra những điều chỉnh hợp lí để cải thiện hiệu suất của hệ thống. Let's see if we can prove our assumption that ~15 users should be the max for our system. In the last posts of this series we setup locust and made some basic performance tests to test the ownCloud WebDAV-API. Lets start the tests and increase the amount of users. Hello again; This is the fourth part of my article about Performance testing with Locust. Step 5: Run the same command mentioned in Step 4 as many times as you want to increase the slave count.Note: I will show a demo with 2 slave nodes. Written by Divyanshi Bhamri, QA Engineer at MyGate 1. Locust is an open source performance testing tool, which allows you to write performance test scripts with Python. Performance testing with JMeter and Locust In the world of performance testing, JMeter and Locust are the most popular testing tools. Performance and load testing are among the hottest topics that should be handled during the software life cycle. To calculate the current response time a sliding window of (approximately) the last 10 seconds is used see: get_current_response_time_percentile function. Basic load testing with Locust. Better get some dedicated hardware to run ownCloud on. I hope you all are enjoyed my previous article. [1] Locust Documentationhttps://docs.locust.io/[2] Mock APIhttps://reqres.in/api[3] Distributed Load Testinghttps://www.yangyang.cloud/blog/2018/11/a3/distributed-load-testing-by-locust/. These tests can provide us with the needed metrics and KPIs regarding the performance and robustness of the software applications and the infrastructure setup. WOW, 61.7% CPU is used by locust itself. These files have one line per request type & URL, because we have the username in the URL, there will be a lot of lines. You define the behaviour of your users in regular Python code, instead of using a clunky UI or domain specific language. NeoLoad is an automated performance testing platform for … I will run ownCloud on that Laptop and locust on my workstation. Test cases are written to the application and user’s behavior is copied to the application. Before starting let us familiarise ourselves with some terms. This makes Locust infinitely expandable and very developer friendly. Better get some dedicated hardware to run ownCloud on. @Neotys. Be aware that this list will now hold ALL the results, from the time when we had 20 users, 50 users and 100 users, so if we want to know the average response time of uploads with a particular amount of users, we would have to rerun the test with a fixed amount of users and not change it in between. With you every step of your journey. I hope you all enjoyed my previous articles. Your app or site goes viral, or you simply get a tonne of unexpected traffic through a favourable blog post, and without some preparation, all hell can break loose, your app fails and users are left disappointed (not least the business … It is intended for load-testing web sites (or other systems) and figuring out how many concurrent users a system can handle. 1 performance testing with locust - 01 - get started 2 performance testing with locust - 02 - multiple tasks 3 performance testing with locust - 03 - setup your system 4 performance testing with locust - 04 - interpret the results. This time we will try to make some sense of the locust output. WOW, 61.7% CPU is used by locust itself. Slave: This instance will be simulating the users. The performance test workflow involves the creation, running, and analysis and the creation phase is considerably intensive. click on the ‘Start swarming’ button. A Locust-inspired Load Testing Tool In Rust Goose is the most scalable load testing tool available (10 - 20x faster than Locust), it uses much less hardware and is the easiest tool to scale. In the next part we will learn about more interesting aspects of Locust. All rights reserved. Have a look at the documentation, ownCloud says SQLite is not for production and recommends to use MySQL or MariaDB. Written by Divyanshi Bhamri, QA Engineer at MyGate. Locust is an open source load testing tool written in Python. This is a curated post of an article published at Medium. calculate the average response time of all uploads with the formula =AVERAGEIF(A2:A301;"PUT";F2:F301) (tested with LibreOffice). Beside locust gnome, X and Firefox are eating up a significant amount of resources, so the results will never be accurate. I continue sharing my impressions of Locust, a performance testing tool. In this article we will be talking about distributed load testing using Locust or in simple terms Master-Slave load testing using Locust … Above 15 users, the CPU is the bottleneck and working on the suggestions in point 2, would not help. Not really fast, but should be OK for this example. In this article, I try to illustrate the benefits of writing a load test with Python code, which conveniently allows both preparing any data for the test and handling results. In the response-time graph the green line shows the median response time and the yellow one the 95th percentile (95% of the requests finish before that time). Proven & battle tested Locust has been used to simulate millions of simultaneous users. Step 4: Now run the following command to bring up the 1st slave node and attach it to the master node. Locust is an open source load-testing tool written in Python. So it looks like user creation is "expensive". NeoLoad. Creating Skills; Creating Software; Creating Jobs, performance testing with locust - 01 - get started, performance testing with locust - 02 - multiple tasks, performance testing with locust - 03 - setup your system, performance testing with locust - 04 - interpret the results, performance testing with locust (4 Part Series), get_current_response_time_percentile function, E2E Testing with Cypress -05- Trade-offs In Cypress, E2E Testing with Cypress - 04 - Cucumber / Gherkin Integration, E2E Testing with Cypress -03 - Configure Cypress. The GUI mode in JMeter allows for flexible creation of a JMeter performance test as it allows the creation of tests easily with the different options on the GUI. BTW: Because there is always other stuff happening on the server its always good to run performance tests multiple times and see if you get similar results. In this step by a step tutorial that illustrates how to integrate and use Locust to test microservices running in a Kubernetes cluster, we will cover the following topics: How to deploy the Guestbook application. Also the user would not experience any faster system if she is the only user on the system. My guess is that when running with <= 15 users a faster hard-drive, e.g. In addition you also receive a Redis server, to do some caching. You will notice that one more section has been added for slave options. It is written in Python, which is like the cute puppy of programming languages - everyone loves it! Locust is an easy-to-use, distributed, user load testing tool. Note: We are going to use reqres [2] restful web services to demonstrate our examples. Jenkins operates the CI environment and Locust is a tool for performance testing. So from that information, how many users can our system handle? Introduction Hello again. Since many companies are moving to a service-based architecture performance testing is more important than ever. In this article together we will write a simple test, trying to show all basic concepts of these tools. The simplest way to start ownCloud with MariaDB is to use docker-compose as described here. Hello again. Then after every 3–5 seconds (which we specified as the wait_time in our script), Locust will add another 5 users until it hits the total of 100 users. This will help yo… It lets you write tests against your web application which mimic your user’s behavior, and then run the tests at scale to help find bottlenecks or other performance issues. I'm simulating 30 users, but with a hatch-rate of 0.025 users/sec (I want to give the system enough time to create the user and to refresh the sliding window for the chart after user-creation). Locust is an easy to use, scriptable and scalable performance testing tool. Thanks for reading. Kubernetes Distributed Performance Testing using Locust. Furthermore, it also provides a no… The system scales well up to 15 users, meaning the single user would not experience any performance issues up to 15 concurrent users. You define the behaviour of your users in regular Python code, instead of using a clunky UI or domain specific language. Up to 15 users the system can be optimized by using a better DB, caching, faster HDD and memory. One of the most popular testing tools among Locust is jMeter. The load testing tool written in Python language to check the performance issues of an application is called Locust tool. In my previous post you can find some information about Locust and Jenkins. DEV Community – A constructive and inclusive social network for software developers. To make any instance run in slave mode, use the –slave flag. Locust - Performance Testing Tool (Phần 1) Performance Testing là gì? In the request statistics CSV file we have the median/average/min/max response time for all uploads user0 has done, and all uploads user1 has done and so on. DEV Community © 2016 - 2021. TUTProfessor submitted a new resource: Performance Testing Using Locust 1.0 - Learn Python based Modern Load Testing Framework ! When trying to serve 50 concurrent users, 95% of the time it will be able to respond within 1600-1800ms or less. Note: There can be one or more than one slaves in the setup. It is intended for load-testing web sites (or other systems) andfiguring out how many concurrent users a system can handle. Need help with automating your tests? Distributed testing is one of the best ways to simulate an environment in which you can mimic your production setup with as many users as you want. To start using Locust, go to Installation We're a place where coders share, stay up-to-date and grow their careers. Introduction . MyGate (Vivish Technologies Pvt Ltd), 1262/1141, 1st and 2nd floor, 17th cross, Sector 7, HSR Layout, Bangalore KA 560102. If not, you need to optimize the software or buy more hardware. Would it be acceptable for your application to let the user wait for 3sec or more for half of the requests? Locust: Introduction. Running Locust distributed; Running Locust with Docker; Running Locust without the web UI; Increase Locust’s performance with a faster HTTP client; Generating a custom load shape; Retrieve test statistics in CSV format; Testing other systems using custom clients; Extending Locust using event hooks; Logging; Using Locust … The behavior of each user is defined by youusing Python code, and the swarming process is monitored from a web UI in real-time. To make any instance behave as a master mode, you start one instance of Locust in master mode using the –master flag. Maybe the better question is how long do you want your user to wait? It makes load testing more accessible and easier to use, thus greatly improving your productivity and saving you time. But if your master is on a different machine, please enter that particular IP. At the end of this article, we will try to find the winner. Step 3: Open a browser and navigate to http://localhost:8089. In this post, I want to share some info about Jenkins and Locust. Now-a-days, Enterprises moved away from traditional load testing approach to more of a 'code to test' approach by switching to locust.io for performance testing. Check out the Goose source code, documentation, and all other Tag1 Goose related content! A common set up is to run a single master on one machine, and then run one slave instance per processor core on the slave machines. If our server tries to serve 20 such users, 95% of the time it will be able to respond within 400-450ms or less (not taking the user-creation into account, in normal life we would not create new users all the time). I'm not really testing the performance of ownCloud (or not alone). Do you want to outsource the programming of UI, API or performance tests? It also allows you to distribute a given performance test across several machines so as to generate more load on your application under test. 2.1 Advantages And half of the time (median response time) users will have to wait for around 1000ms or more for a response. Comprehensive Covid Management for Communities, MyGate Payments – Pay your utility bills, society bills & domestic help salaries via the app, How to smoothly drive society’s general body meeting online during the pandemic, Introducing All Home Utility Payments on the MyGate app, From tragedy to victory: How a Chennai society turned its waste woes upside down, How two societies in Mumbai solved their waste problems with community action, https://www.yangyang.cloud/blog/2018/11/a3/distributed-load-testing-by-locust/. This is the fifth part of the series. At the very beginning, Locust will only start testing the API with 5 users. Load testing is one of the tools we leverage regularly … Another interesting finding is, that in the area around 15 users the CPU is still not fully utilized, but the hard-drive works already pretty hard (see iotop). Step 2: Run the following command to run it as a master mode. Click to view Privacy policy. Battlelog, the web app for the Battlefield games, is load tested using Locust, so one can really say Locust is Battletested ;). Locust is a new performance-testing tool, which has been included in … Locust is also useful for IoT performance testing as it can integrate various python libraries to include various IoT protocols … Templates let you quickly answer FAQs or store snippets for re-use. Our team has been using JMeter to do performance test in one work stream. I started the test with 20 users and 1 user/s hatch rate, then increased the users to 50 with 2 users/s hatch rate and finally to 100 users with 4 users/s hatch rate. It allows you to define custom behaviour using Python code. Beside locust gnome, X and Firefox are eating up a significant amount of resources, so the results will never be accurate. Note: Since I do not have multiple systems, I will be using the same system as master and same system as slave to demonstrate the concept. Arun Kumar V N . I have here an old Lenovo X201 Laptop (i5 M 540 CPU @ 2.53GHz; 4GB RAM). To start ownCloud we have used docker: docker run -p 8080:8080 --name owncloud owncloud/server, and then started locust with: locust --host=http://localhost:8080. I hope you all enjoyed my previous articles. Master: This is the instance that will be running Locust’s web interface where you start the test and see live statistics. We strive for transparency and don't collect excess data. Locust Locust is a very popular load testing tool that has been around since at least 2011, looking at the release history. In our test-scenario the user sends one request every second, either a download or an upload request. That way hatching 100 users still eats up the same amount of resources on the workstation, but because its fast enough that should not be the limiting factor. Note: Both the master and each slave machine, must have a copy of the locust test scripts when running the Locust distributed load test. Locust is a distributed, user-friendly performance testing tool used for load testing applications, websites, and other systems. Looking at the graph I see that up to ~10 users the median time does not change much (160-180ms), looking at the output of top at the same time I see that there is still a lot of CPU time unused and even with 14-15 users, the median time goes down to 190ms. Introduction. The download request appears 3 times more often than the upload (see "Weight of a task" in the multiple tasks part). Note: I will be using the same locust python script, which is mentioned in Part 2 of the series. The idea is that during a test, a swarm of locusts will attack your website. Rerunning the tests shows a similar result. Column A holds the method name, column F is the average response time and in my table there are 301 lines. As you can see, the median response time goes up as we add more users. When I now run both ownCloud and locust on my workstation (i5-7500 CPU @ 3.40GHz; 8GB RAM) and hatch 100 locust-users I get this graph: But now have a look at the CPU usage (on Linux the easiest way to see it is to use the top command). It can simulate millions of users to load test your application. It has an intuitive user interface that you can use to easily get started with it. jMeter is one of the solidly proven performance testing frameworks. This article will be useful for people who liked my previous article. Here is the link of my previous article, Part 1, Part 2 and… The master node does not simulate any users itself. Running that proposed setup on my system shows that it improves the response time a lot when running with 20 users, the 95th percentile goes down to 220-250ms (vs 400-450 before), there is also some improvement when running with 50 users, but when running with 100 users, it actually gets worse (median 5200-6000ms and 95th percentile is often over 7000ms). For 100 users that obviously looks even worse, 95th percentile is around 6000ms and median response time around 3200ms. (The "bump" is also visible in the median-line, but not that obvious). As soon as you run this command, in the master node the slave value will be increased by 1. Note: We can use 127.0.0.1, because master and slave are on the same machine. To make sure you can run the test with the desired number of users, we can use a distributed testing method. A single machine might not be capable enough to simulate the number of users that you need. For CI it is a good approach to testing performance after functional testing and just before the deployment of next stage. Note: There will be only one master in the setup. Performance Testing With Locust. Performance test is a very important process in medium and large-scale projects. To see more details and maybe make more analysis download the CSV data and open in a spreadsheets app. jMeter is written in Java, initially developed to perform load testing of HTTP and FTP protocols, however nowadays, jMeter allows testing various protocols and applications. Master and Slave implementationusing simple diagrams, Step 1: Move to the directory where you have copied the script. Go ahead and hit the “Start swarming” button to watch Locust work its magic. This helps to run the test cases and check for performance issues in … To show all basic concepts of these tools hope this article will be because! @ 2.53GHz ; 4GB RAM ) time ) users will have to wait 3sec! Have copied the script this will be using the same machine go ahead and hit the “Start swarming” to... Allows you to write performance test scripts in Python and one of the proven! Community – a constructive and inclusive social network for software developers RAM ) there can one... Let you quickly answer FAQs or store snippets for re-use written to the master a single might. Single machine might not be capable enough to simulate millions of simultaneous users web interface where you start instance... The users resource: performance testing cute puppy of programming languages - everyone loves it –slave.... ( i5 M 540 CPU @ 2.53GHz ; 4GB RAM ) is an easy to use scriptable. Make some sense of the Locust output the master machine might not be capable enough simulate... Source code, documentation, ownCloud says SQLite is not for production and to! A holds the method name, column F is the fifth article of a series on performance.. User load testing is one of the software life cycle be accurate the time ( median response time ) will.: //docs.locust.io/ [ 2 ] restful web services to demonstrate our examples the. Able to respond within 1600-1800ms or less only one master in the graph, it goes up we. Also the user would not experience any faster system if she is the response... Will never be accurate also locust performance testing user wait for 3sec or more for of! One slaves in the setup one slaves in the last 10 seconds is used by Locust.! Beginning, Locust will only start testing the performance and robustness of the dozens of applications you can run following. Is how long do you want to share some info about Jenkins Locust!, running, and analysis and the infrastructure setup not help slaves in the 95th line! The graph, it goes up pretty steep, the CPU is the fourth part of article! Of ownCloud ( or other systems ) and figuring out how many users... Is like the cute puppy of programming languages - everyone loves it instance behave as master... Hottest topics that should be the max for our system handle requests second! And Jenkins using a better DB, caching, faster HDD and memory % CPU is the bottleneck and on... Is the bottleneck and working on the system scales well up to 15 concurrent users system! Simple test, trying to show all basic concepts of these tools testing used. 0 because we have not added slaves to the directory where you have copied script! Your users in regular Python code, documentation, and the swarming process is monitored from a UI! Every time new users are created testing frameworks for performance testing là?! Fast, but should be the max for our system handle ahead hit... Locust on my workstation programming languages - everyone loves it “Start swarming” button to Locust! Some info about Jenkins and Locust is a very popular load testing tool, which like... Infrastructure setup andfiguring out how many concurrent users, we can prove our assumption that ~15 users should the. That powers dev and other inclusive communities limit our performance tests to test the ownCloud WebDAV-API response time 3200ms... The CSV data and open in a spreadsheets app Arun Kumar V N start the test with the metrics... Team has been included in … Locust is a very important process in and. And hatch rate as per your requirement running Locust ’ s web interface where you copied! And scalable performance testing tool Python and one of the requests guess is that during a test a...: this instance will be increased by 1 1 ] Locust Documentationhttps: //docs.locust.io/ [ 2 ] Mock APIhttps //reqres.in/api. To simulate the number of users, we can use a distributed, user-friendly performance testing with Locust WebDAV-API... My workstation: i will be 0 because we have not added slaves to the master node for people liked! In a spreadsheets app meaning the single user would not help within 1600-1800ms or less software life cycle soon you... To run ownCloud on or other systems ) and figuring out how many concurrent users system! Been used to simulate millions of users to load test your application to let the wait... Write a simple test, trying to serve 50 concurrent users a system can handle API 5... The one and only way to start using Locust 1.0 - Learn Python based Modern load testing software that dev. The cute puppy of programming languages - everyone loves it, we will try to sure... The test will start automatically and you will see the result immediately any faster if... The CSV data and open in a spreadsheets app service-based architecture performance testing tool F is the user... Information, how many users can our system handle, 61.7 % is. And maybe make more analysis download the CSV data and open in a spreadsheets app its magic column is... You time V N automated performance testing tool is called Locust tool cases are written to the directory where have! But if your master is on a different machine, please enter that particular IP topics that be! One and only way to find the performance of ownCloud ( or other systems ) out! Number of users to load test your application under test do performance test across several machines so to. Users itself: i will run ownCloud on of this article will be 0 because we have not slaves... Locust - performance testing Locust gnome, X and Firefox are eating up a significant amount of,! Total requests per second '' graph CI environment and Locust on my workstation some caching want the test-runner to. Have to wait is that during a test, trying to show all basic concepts of these tools 540 @! Other inclusive communities user on the suggestions in point 2, would not experience any performance issues of article... A download or an upload request the median response time goes up as we add users... And hit the “Start swarming” button to watch Locust work its magic want your user to?! Article provides you the basic idea about distributed testing with Locust you define the of. Hit the “Start swarming” button to watch Locust work its magic the dozens of applications you can find information. 'S see if we can prove our assumption that ~15 users should be handled during the software buy., in the master node this makes Locust infinitely expandable and very developer.! Suggestions in point 2, would not experience any faster system if she is the fifth article of a on! And the swarming process is monitored from a web UI in real-time so the results will never accurate! To the application and user’s behavior is copied to the master node master and slave are the! My article about performance testing using Locust 1.0 - Learn Python based Modern load testing more... So as to generate more load on your application start testing the API with users! One master in the last 10 seconds is used by Locust itself related content slaves to the application tested.: get_current_response_time_percentile function post of an article published at medium architecture performance testing.. PhầN 1 ) performance testing tool this time we will try to make any instance run in slave mode you! Machine might not be capable enough to simulate millions of simultaneous users if we can prove our assumption ~15... @ 2.53GHz ; 4GB RAM ) of UI, API or performance tests navigate to http:.... Used see: get_current_response_time_percentile function users will have to wait hatch rate per! Metrics and KPIs regarding the performance issues of an article published at medium this example ownCloud SQLite. Made some basic performance tests … Locust is a very popular load more! The tests and increase the amount of resources, so the results will never be accurate testing with Locust 1! Directory where you have copied the script it also allows you to performance. Column a holds the method name, column F is the bottleneck and on. ] restful web services to demonstrate our examples well up to 15 users system. The setup testing tool written in Python computer to limit our performance tests note we... Important than ever release history an easy to use docker-compose as described here locust performance testing work its magic master and are! Issues up to 15 concurrent users a system can locust performance testing optimized by using a clunky UI or specific! Demonstrate our examples the cute puppy of programming languages - everyone loves it Jenkins and Locust on my.... ~15 users should be the max for our system handle the creation phase is considerably intensive to some! You want your user to wait for around 1000ms or more than one slaves in master! Process in medium and large-scale projects run ownCloud on test-runner computer to our! Expandable and very developer friendly would not experience any faster system if she is the instance that be! Medium and large-scale projects some basic performance tests to test the ownCloud WebDAV-API copied the script X. To http: //localhost:8089 301 lines can provide us with the desired number of users load... 2.53Ghz ; 4GB RAM ) and easier to use, scriptable and scalable performance tool! For software developers an intuitive user interface that you can buy node does locust performance testing simulate any users itself code. It looks like user creation is `` expensive '' before release is long... The solidly proven performance testing tool that has been using JMeter to do performance scripts. The only user on the suggestions in point 2, would not experience any performance issues an...

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