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This project implements a basic server & client application in Node.js

server.js: The server is listening on 'http://localhost:3000' and is connected to a redis database. It receives an user-name from the client, check in the redis database, if exists, response with 'Hello user-name(in upper case)' else with 'Oops...'.

client.js: Creates a socket.io-client, which connects to the server and sends an user-name to check if it exists in the redis database.

createDatabase.js: If a key named 'user' exists in the 'redis-server', it deletes it and creates a new set named 'user' with 8000 user-name.

loadTester.js: Code for load testing manually. It creates a new client at a given rate and prints number of connected clients every seconds.

my-script.yaml: Script for load testing with 'artillery'. It starts with creating (arrivalRate = ) 200 clients per second to (rampTo = ) 10000 clients per second. 'functions.js' is used to create a random user-name for each clients that it creates. It also generates reports as 'report.json' and 'report.html' format.

How to use

Start a redis server at default port. (Head over here if you are new in redis)
Run npm i socket.io redis socket.io-client bluebird async-redis
Run npm run database to prepare the database.
Run npm run server to start the server.
Run npm run loadtester to load test manually.
Run npm run client to connect a single client.
Run npm install -g artillery to install Artillery. (Only works for node.js version >= 12)
Run artillery dino to test if artillery is working.
Run artillery run --output report.json my-script.yaml to load test and generate report on report.json.
Run artillery report --output report.html report.json to generate graphical report.