Python Redis: Caching and Fast Data Structures
Python Redis: Caching and Fast Data Structures Redis is an in-memory data store used for caching, session storage, pub/sub messaging, leaderboards, ra…
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Designing a Rate Limiter: Token Bucket vs Sliding Window, and Making It Distributed
A rate limiter answers one question on every request: has this client made too many calls, and should I reject this one? It sounds trivial until you h…
Next.js ISR and On-Demand Revalidation — Caching Without Staleness
Incremental Static Regeneration (ISR) is one of the more powerful caching strategies in Next.js — and one that's often misconfigured in ways that eith…
Connect Redis, Postgres, and MySQL to Serverless Apps Over HTTPS
Serverless and edge runtimes are great until your app needs a normal TCP database connection. ZedGi works with: TypeScript / JavaScript SDK : Cloudfla…
Connect Redis, Postgres, and MySQL to Serverless Apps Over HTTPS
Serverless and edge runtimes are great until your app needs a normal TCP database connection. ZedGi works with: TypeScript / JavaScript SDK : Cloudfla…
Monitoring Python RQ jobs: what to watch and how to get alerted
RQ (Redis Queue) is a delightfully simple way to run background jobs in Python. That simplicity is also why teams under-monitor it: it just works, unt…
How to get alerted when a BullMQ job fails (before your users do)
If you run BullMQ in production, you've probably had this moment: a customer tells you their payment/email/export never went through, you go digging, …
Stop API Floods: Redis Sliding Window Rate Limits ⚡
The Fixed Window Vulnerability When protecting your SaaS API at Smart Tech Devs, rate limiting is your first line of defense against DDoS attacks and …
How I Use Redis Beyond Simple Caching: A Senior Dev's Perspective
Table of Contents 1. High-Performance Rate Limiting (Sliding Window Log) 2. Reliable Distributed Locking & Safe Release 3. A Lightweight, High-Thr…
Cron jobs and schedulers with BullMQ
In-process cron ( node-cron , @nestjs/schedule , OS crontab) runs inside one Node process. That is fine for a single instance, but it does not survive…
Enhance AI Workflows with LangGraph's HITL Feature
LangGraph: Integrating Human Oversight into AI Workflows for Regulated Industries TL;DR: LangGraph enhances AI workflows by embedding Human-in-the-Loo…
Ghost Workers: Why Your Celery Dashboard Lies to You
The scenario you've lived It's 2am. Someone pings you: emails aren't going out. You check Flower. Every worker is green; online, healthy. Queue depth …
🚀 The RAM Disk Revival & In-Memory Architectures
If you ask any senior backend engineer or database administrator how to instantly make a slow, disk-bound application faster, their first answer is al…
Stop API Abuse: Advanced Rate Limiting in Laravel
The Scraping Burst Vulnerability When you expose a valuable B2B SaaS API at Smart Tech Devs, you aren't just serving legitimate clients. You are const…
Redis with Docker Compose: Persistence, Security, and Production-Ready Configuration
Originally published on bckinfo.com Redis with Docker Compose: Persistence, Security, and Production-Ready Configuration Table of Contents Why Redis C…
Your Python rate limiter is lying to you the moment you add a second server
Most rate-limiter tutorials show you a tidy little token bucket that works perfectly — on one machine. Then you deploy to production, where you're run…
How I Built a Production Ready Microservice Notification System with NestJS, Redis, Bull Queues, and Docker
I built a real time notification microservice with NestJS, Redis, PostgreSQL, and Docker. When you are building a system that needs to deliver notific…
Database Rate Limiting: The Missing Piece After a Circuit Breaker
This is an extension to my previous post on Circuit Breakers . It only decides: "Should I even try calling Redis?" When the circuit is open, your appl…
A Circuit Breaker Alone Won't Save Your Database
A common misconception is that a circuit breaker protects your database . It doesn't. It only protects your application from repeatedly calling a depe…
Why Redis Doesn't Implement "True" LRU
One question that recently made me rethink cache eviction was: If Redis uses LRU, why doesn't it maintain a heap (or a perfectly sorted list) of keys?…
Distributed Scheduled Job Locking with Redis
We had a simple scheduled job: every hour, pull new products from a third party API. It worked fine on one server. Then we scaled to ten. Suddenly, ev…
The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching
Rails Performance: Lessons from Production — #4 The first three posts were about making queries cheaper — fewer N+1s, indexes, not dragging data back …
Redis on Windows with Laragon and Laravel: The PATH Issue That Looks Like a Redis Issue
A few days ago, I was working on a Laravel project on Windows. The project needed Redis for cache and queue handling, and since I was using Laragon, I…
Stream Postgres WAL to Redis: Real-Time Read Models with pg2redis
Real-time data pipelines are becoming a normal part of application architecture. Product pages need fresh stock counts, order status screens need fast…
Beyond the Cache Miss: Designing Resilient Caching Layers with Redis Degradation Strategies
1. The Anatomy of a Cache Disaster To design a solution, we must first analyze how cache failures manifest as systemic outages. Consider a standard re…
HackTheBox: Postman Writeup
Summary Postman is an easy-rated Linux machine on HackTheBox. The box exposes an unauthenticated Redis instance that allows writing an SSH public key …
Defeating Webhook Storms: Idempotency in Laravel 🛑
The Double-Billing Nightmare When integrating with enterprise payment processors like Stripe or enterprise CRMs at Smart Tech Devs, relying on webhook…
I Built a Redis Clone from Scratch in Node.js — RESP, Persistence, Replication, Pub/Sub and Transactions
Most of us use Redis like this: SET name Alice GET name It feels simple. You send a command. Redis stores something. You get the value back. But I wan…
Valkey vs Redis: API Protocol, Data Format & Compatibility — The Technical Deep-Dive
When Redis changed its license on March 20, 2024, it triggered one of the fastest open-source forks in recent memory. Eight days later, on March 28, 2…
Redis Isn't Just a Cache: 14 Use Cases (System Design)
You're probably using Redis for one job. There are 13 more, and a few of them work in ways that surprised me even after years of using it. I just publ…