A read-aside cache is simple, predictable, and provides users control over what to cache, when to cache, and how to handle cache misses. Now, imagine the power of Sequelize, a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite, and Microsoft SQL Server, combined with the lightning speed of Momento’s caching system. 

Why Sequelize?

Sequelize is the go-to ORM for many developers working with relational databases in Node.js. It offers flexibility, scalability, and the power to deal with complex database interactions. But as applications scale and the database grows, retrieving data can become a bottleneck. This is where a read-aside cache comes into play.

Rather than fetching from the primary data source every time, read-aside caching first checks the cache. If the data exists, it serves it right away; if not, it fetches from the primary source, caches it, and then serves it. This pattern not only reduces the steady-state strain on your primary data store but is particularly crucial in absorbing unexpected traffic spikes, ensuring consistent data retrieval performance even during peak loads.

Momento to the Rescue

The Momento-backed read-aside caching implementation for Sequelize brings the best of both worlds. With Momento’s robust caching mechanism, the library ensures that Sequelize queries are cached efficiently. And for those familiar with Sequelize’s dialects, the great news is you can use Momento as your caching engine for any of Sequelize’s database dialects.

Setting up is straightforward. Install the dependency:

npm i @gomomento-poc/momento-sequelize-cache

Create a Momento API key, create your cache called model-cache, and integrate:

import { Configurations, CredentialProvider } from "@gomomento/sdk";
import { modelCacheFactory, MomentoClientGenerator} from "@gomomento-poc/momento-sequelize-cache";

const momentoClient = MomentoClientGenerator.getInstance({
        configuration: Configurations.Laptop.latest(),
        credentialProvider: CredentialProvider.fromEnvironmentVariable({environmentVariableName: 'MOMENTO_API_KEY'}),
        defaultTtlSeconds: 60,    
});

const modelCache = await modelCacheFactory(momentoClient);

The ^modelCache object provides a ^wrap method that you can use to wrap any existing Sequelize model. From that point, the wrapped object provides the same familiar APIs that your Sequelize model object would. For example, to fetch a User (from a ^User model) by the primary key, the call looks like:

await modelCache.wrap(User).findByPk(1);

This call orchestrates the read-aside caching lifecycle: prioritizing cache retrieval, resorting to the Sequelize database on cache misses, and subsequently updating the cache for future requests. You can quickly get started by running one of our examples with various queries.

Spotlight on Benefits:

• Load Reduction: Efficiently offload your primary database by serving recurrent data from the cache, reducing the strain on your primary data store.
• Spike Smoothing: Absorb unexpected traffic surges and ensure your database remains responsive during peak times.
• Consistent Latency: Achieve more predictable data retrieval times, reducing the variations in response times.
• Cost Savings: Reduce the number of direct reads from your database, potentially lowering operational costs.
• Enhanced Scalability: Prepare your application for future growth without the immediate need to scale your primary database.

With these advantages in hand, integrating Momento’s read-aside caching with Sequelize becomes a compelling choice for any developer looking to optimize their application’s performance.

Conclusion

A read-aside cache can significantly improve the performance of applications. It not only accelerates data retrieval but also lightens the load on primary data stores, resulting in benefits for both developers and end-users. With Momento enhancing your Sequelize applications, you’re set to experience a harmonious blend of speed and efficiency.

Ready to amplify Sequelize? Dive into the Momento library and see the magic unfold. If you have any queries or need assistance, don’t hesitate to reach out on our Discord server. Our team is always eager to help you elevate your caching game. 

Remember, every moment saved in data retrieval translates to a better user experience. Bring the best possible experience to your users with Momento by your side. Happy caching!

Pratik Agarwal

Author

Pratik is a software engineer at Momento, specializing in distributed systems. With a rich background spanning roles at prominent teams like AWS DynamoDB and Marketplace, he has honed his expertise across the backend stack. Now at Momento, Pratik is on a mission to elevate the developer experience, rooted in his conviction that it’s a cornerstone of serverless computing. Beyond the code, he is passionate about kickboxing and cricket, and loves delving into the strategic nuances of poker, always seeking the upper hand at the table.