xk6-kafka VS xk6-redis

import { Writer, Reader, SCHEMA_TYPE_STRING, SchemaRegistry, GROUP_BALANCER_ROUND_ROBIN, BALANCER_ROUND_ROBIN, } from "k6/x/kafka"; import { check, sleep } from "k6"; const bootstrapServers = [ 'kafka-bootsrap-1:9001', ]; let vus_amount = 3; let total_written = 0; let total_read = 0; export const options = { vus: vus_amount, iterations: "3", thresholds: { kafka_writer_error_count: ["count == 0"], kafka_reader_error_count: ["count == 0"], }, }; const topicName = "my-topic"; const schemaRegistry = new SchemaRegistry(); const producer = new Writer({ brokers: bootstrapServers, topic: topicName, balancer: BALANCER_ROUND_ROBIN, // or pick another balancer https://github.com/mostafa/xk6-kafka/blob/main/api-docs/index.d.ts#L66 // ... auth config }); export function teardown(data) { producer.close(); } export default function () { const consumer = new Reader({ brokers: bootstrapServers, // it is important to set groupID, groupTopics and groupBalancers when using Kafka bootstrap server // topic ReaderConfig param doesn't quite work with bootstrap server groupID: topicName + "-group", groupTopics: [topicName], groupBalancers: [GROUP_BALANCER_ROUND_ROBIN], // or pick different balancer https://github.com/mostafa/xk6-kafka/blob/main/api-docs/index.d.ts#L75 }); let messageAmount = 1000; if (__VU == 1) { console.log('VU 1, writing messages. Iter ' + __ITER); for (let index = 0; index < messageAmount; index++) { let messages = [ { value: schemaRegistry.serialize({ data: "test-value-string-" + index + "-vu-" + __VU + "-iter-" + __ITER, schemaType: SCHEMA_TYPE_STRING, }), }, ]; producer.produce({ messages: messages }); total_written += messages.length; } } let consumerMsgAmount = Math.floor(messageAmount / vus_amount); let messages = consumer.consume({ limit: consumerMsgAmount}); total_read += messages.length; console.log("Amount of msgs received: " + messages.length + ", VU " + __VU + ", iter " + __ITER); check(messages, { "all messages returned": (msgs) => msgs.length == consumerMsgAmount, }); let firstMessageValue = schemaRegistry.deserialize({ data: messages[0].value, schemaType: SCHEMA_TYPE_STRING, }); let lastMessageValue = schemaRegistry.deserialize({ data: messages[consumerMsgAmount - 1].value, schemaType: SCHEMA_TYPE_STRING, }); check(messages[0], { "Topic equals to": (msg) => msg["topic"] == topicName }); console.log("First msg value " + firstMessageValue + ", offset" + messages[0]["offset"] + ", partition " + messages[0]["partition"] + ", VU " + __VU + ", iter " + __ITER); console.log("Last msg value " + lastMessageValue + ", offset" + messages[consumerMsgAmount - 1]["offset"] + ", partition " + messages[0]["partition"] + ", VU " + __VU + ", iter " + __ITER); consumer.close(); }

Apache Kafka, like any other service, platform or server, has its performance limitations. In order to know them, you need to run performance tests on Apache Kafka's Cluster, which will show acceptation thresholds. One project that can help with this is xk6-kafka.

I am thrilled to announce that I released xk6-kafka v0.12.0, a complete revamp of the JavaScript API plus many other features and fixes. You can read more about it on the changelog of the release: https://github.com/mostafa/xk6-kafka/releases/tag/v0.12.0

The xk6-kafka extension provides some convenient functions for interacting with Kafka Producers and Consumers. It serves as a producer that can send a high volume of messages per second, allowing you to monitor the system under test (SUT) and test how the application will keep up with the load.

Fortunately, k6 provides the xk6-redis extension as part of their ecosystem. You can use it directly to build your own custom k6 binaries for testing Redis server.