Personal blog of Yzmir Ramirez

Rate limiting is one of those topics that looks simple until you’re actually doing it in production. Implement a counter with the INCR command and a TTL and away you go. But when you ask questions like “what happens at the boundary?”, “should I use a Valkey/Redis cluster?”, or “why are we getting twice the […]

  This blog post covers the details about sorted set use cases as discussed in this video. Sorted sets are one of the most powerful data structures in Valkey and Redis. While most developers immediately think about “gaming leaderboards” when they hear about sorted sets, this versatile data type can solve many problems, from task […]

?This post covers the topic of the video in more detail and includes some code samples. The $9,000 Problem You launch a chatbot powered by one of the popular LLMs like Gemini, Claude or GPT-4. It’s amazing and your users love it. Then you check your API bill at the end of the month: $15,000. […]

One of our founders, Peter Zaitsev took a look at Redis (Remote DIctionary Server) when it first emerged in 2009 https://www.percona.com/blog/looking-at-redis/ which reminded me how far this project has come in sixteen years, evolving from a simple key-value store into a multi-model platform including vector search. This article covers this evolution in four distinct eras. […]

This article explains how you can perform Point-in-time-Recovery (PITR) in Valkey/Redis. Requirements To perform PITR, you need to have append-only logging enabled. By default, AOF in Valkey/Redis only records the operations that have been executed against the instance, not when they were executed. For that, we need to enable the aof-timestamp-enabled parameter. So your Valkey/Redis […]

If your Valkey/Redis deployments use SSL/TLS, you will eventually need to rotate the TLS certificates. Perhaps it is because the certificates are expiring, or you made mistakes when creating them, or it could be that the private key has been leaked. This article explains the process of rotating the TLS/SSL certificates used by Valkey/Redis deployments […]

Summary This article is a detailed analysis of the impact of the Redis license change to a non-open-source one on its community. To summarize the findings:  37.5% of contributors (9 of 24) stopped contributing to Redis after the fork Valkey grew from 18 to 49 contributors in 18 months Valkey averages 80 PRs/month in 2025 […]

When scaling Redis or its open source fork Valkey, a single instance can cause a bottleneck. The solution is to create a sharded cluster, where the cluster partitions data across multiple nodes. Understanding how this partitioning works is crucial for designing efficient, scalable applications. This article explores the mechanics of key distribution, the use of […]

New to Valkey? This guide walks you through the basics and helps you get up and running. Starting with new tech can feel overwhelming, but if you’re ready to explore Valkey, you probably want answers, not some fancy sales pitch. Let’s cut to the chase: Switching tools or trying something new should never slow you […]

Getting started with Redis? Read this first. Redis makes it very easy to get started, but if you want Redis to keep up when things get busy, there’s a bit more to take care of. Anyone can spin up a test server, but production workloads demand reliability and performance planning. That’s where the details matter. […]