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⚠️ This is the archived documentation for k6 v0.46. Go to the latest version.

Client.getSet(key, value)

Atomically sets key to value and returns the value previously stored at key.


keystringthe key to get and set
valuestring, number, or booleanthe value to set


TypeResolves withRejected when
Promise<string>On success, the promise resolves with the old value stored at key.If key does not exist, or does not hold a string value, the promise is rejected with an error.


import redis from 'k6/experimental/redis';
// Get the redis instance(s) address and password from the environment
const redis_addrs = __ENV.REDIS_ADDRS || '';
const redis_password = __ENV.REDIS_PASSWORD || '';
// Instantiate a new redis client
const redisClient = new redis.Client({
addrs: redis_addrs.split(',') || new Array('localhost:6379'), // in the form of 'host:port', separated by commas
password: redis_password,
export default async function () {
await redisClient.set('mykey', 'oldvalue', 0);
await redisClient.getSet('mykey', 'newvalue');
await redisClient.getDel('mykey');