How do you implement a circuit breaker across multiple service replicas?
In a single Node.js process, a circuit breaker can track failures with a ring buffer, threshold, and timestamps. But when the same service runs on twenty replicas, each…
Redis
Are databases a bad fit for Docker Swarm in production?
I'm using Docker Swarm for several stateless services and it has worked well, but I'm struggling with persistent workloads such as PostgreSQL and Redis. Shared NFS volumes become…
How should databases be run reliably alongside Docker Swarm in production?
I'm comfortable using Swarm for stateless applications, but persistent services such as PostgreSQL and Redis are proving much harder. NFS volumes struggle under heavy I/O, while pinning a…
What Redis-compatible option supports more than 16 isolated application namespaces?
I'm looking for a self-hosted, Redis-compatible data store that can be shared by many applications and services. Redis provides logical databases 0–15, but I'd prefer to give each…
Should I preload all database records into memory when the server starts?
I'm building a simple application with mostly static data, although new records will be added over time. For verification requests, I only need to check whether a requested…
Should I preload all database records into memory when the server starts?
I'm building a small application with mostly static data, although new records will be added over time. For each verification request, I only need to check whether a…
What I Learned Building a Synchronized Social Music Room
I recently built a social music site inspired by the old virtual DJ-room format, where people join rooms, queue songs, and listen together in sync. A group of…
What’s the best way to build analytics for up to one million alert events?
I'm building a driver-monitoring system for roughly 150–200 buses. It generates alert events, and a Svelte supervision dashboard may need to analyze around 360,000 records in a typical…
Redis or Infinispan for Non-Sticky Tomcat Sessions Across Three Availability Zones?
I'm evaluating session storage for a Tomcat deployment spread across three availability zones, where requests may reach different application instances. Each HTTP session is essentially a 40–100 KB…
How are you handling runtime rate-limit changes without rebuilding containers?
Our rate limits—token-bucket sizes, thresholds, and similar values—are currently part of the static configuration baked into each container image. When traffic spikes or we need an emergency throttle,…
How to Manage Async Job Queues When SaaS Volume Suddenlly Increases?
I recently faced a challenge with my Node.js backend when the volume of my B2B SaaS unexpectedly tripled in just three months. We were using a basic cron-based…
Why am I getting a Redis connection error in my Docker setup?
I'm encountering a Redis connection error while working on my Docker Compose configuration. My setup includes a database service using Postgres, a Redis service, and backend and frontend…
What's the Best Way to Build a Real-Time Queue System for a Web App?
I'm trying to design a web app where users join a queue and get live updates on their position and estimated waiting time—like what you see in clinics,…
Troubleshooting Azure App Service Container Startup Issues
I've been digging into a problem where my Azure Web App container refuses to start, even though the logs indicate that my app is listening properly. I also…
How Do You Handle Async Tasks in Production?
I'm working on several APIs that need to utilize an asynchronous pattern, particularly for tasks that involve database stored procedure calls that can take anywhere from 5 to…
Best Ways to Deploy Redis Sentinel for High Availability Without Bitnami?
I'm looking to set up Redis with Sentinel for high availability on Kubernetes. I previously used the Bitnami Helm chart, but with their images being discontinued, that option…
Dealing with Fargate's CPU/RAM Limits for Redis
I'm currently using ECS Fargate to run a small Redis cache as part of my trials, but I've hit a snag with how CPU and memory are sized…
Understanding the Bitnami Updates and Alternatives
I'm trying to make sense of the recent changes with Bitnami and I have a few questions: 1. I've heard the images will only be available under the…
Best Strategies for Managing Cross-App State Changes
I'm curious about the best ways to manage state changes between different applications. For example, if App A updates a certain state, and then App B needs to…
Budget-Friendly Deployment Options for My Web App
Hey everyone! I've built a web application as a side project and I'm looking for affordable ways to deploy it. My setup includes a backend using FastAPI and…