Redis, a high-performance in-memory data store, is a popular choice for caching and managing data in modern web applications. In Nest.js, a powerful Node.js framework, setting up and utilizing multiple Redis databases can significantly enhance data management capabilities. In this blog post, we'll walk you through the process of defining and using multiple Redis databases in your Nest.js application.

Using multiple Redis databases can help segregate data and improve the efficiency of your application. For instance, you might want to separate user sessions from cache data or manage different datasets separately. Nest.js provides a flexible and organized way to achieve this.

First, make sure you have the nestjs-redis package installed. This package simplifies the process of integrating Redis into your Nest.js application. You can install it using npm or yarn:

In your Nest.js application, create a Redis configuration module. For this example, let's assume we want to set up two Redis databases: one for caching and another for sessions.

import { registerAs } from '@nestjs/config';

export default registerAs('redis', () => ({

    port: parseInt(process.env.CACHE_REDIS_PORT, 10),

    host: process.env.SESSIONS_REDIS_HOST,

    port: parseInt(process.env.SESSIONS_REDIS_PORT, 10),

    db: 1, // Database index for sessions

Ensure you have the required environment variables set in your .env file or your server environment for the Redis host and port for both cache and sessions databases.

In your main application module (app.module.ts), import and configure the RedisModule with the dynamic configuration provided by the redis.config.ts module.

import { ConfigModule, ConfigService } from '@nestjs/config';

import { RedisModule } from 'nestjs-redis';

import redisConfig from './redis.config';

      useFactory: (configService: ConfigService) =>

Now that you have set up your Redis configuration and imported the RedisModule, you can use the Redis service to interact with multiple databases within your services or controllers.

import { Injectable } from '@nestjs/common';

import { RedisService } from 'nestjs-redis';

  constructor(private readonly redisService: RedisService) {}

  async setValue(key: string, value: string): Promise<string> {

    const cacheClient = this.redisService.getClient('cache');

    return await cacheClient.set(key, value);

  async getValue(key: string): Promise<string | null> {

Configuring and utilizing multiple Redis databases in Nest.js provides a powerful way to manage data efficiently and effectively within your application. By following the steps outlined in this guide, you can seamlessly segregate data, improve performance, and leverage Redis's capabilities to the fullest extent.

With Nest.js's modular and organized approach, integrating Redis into your application becomes a smooth process, allowing you to focus on building robust and performant applications.

Learn to implement multiple Redis databases in Nest.js. Organize data, enhance performance, and efficiently manage cache and sessions using the nestjs-redis package.

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