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NO idea where to start learning SQL?
12+ hour, 50+ min ago (246+ words) This article is a beginner friendly guide that gets you started into learning SQL as a programming... Tagged with programming, productivity, beginners, webdev....
Redis Is Not Your Database: Designing Cache Failures, Fallbacks, and Resilient Backends
14+ hour, 23+ min ago (724+ words) Redis can make a backend dramatically faster. It can also make a backend dramatically more fragile if the architecture treats the cache as a dependency that must always be available. The distinction is simple: A database stores authoritative data. A…...
I Thought Redis Would Save My API. Just 500 Requests Proved Me Wrong.
14+ hour, 53+ min ago (243+ words) As our series continues, Deep-Dive Backend Systems Roadmap. I created the simplest weather API... Tagged with webdev, distributedsystems, redis, programming....
Why Is Redis So Fast? Understanding the In-Memory Database
15+ hour, 53+ min ago (27+ words) Redis can deliver extremely low-latency reads and writes. Here’s how in-memory storage, persistence, data structures, and its mostly …...
Agentic RAG 2026: When the AI Decides How It Searches
20+ hour, 33+ min ago (274+ words) Production systems standardly use LangGraph as the orchestration framework for this, supplemented by LlamaIndex for the retrieval layer. LangGraph's checkpointing makes every step of the agentic loop traceable, pausable (for human approvals), and repeatable – an essential property for compliance and…...
Your app went viral. Adding servers made it worse. Here's why.
1+ day, 15+ hour ago (94+ words) It's midnight, someone huge shares your app, 100,000 people show up — and the page dies. You add three servers. It gets worse. The rule that finally made this click for me: before you add capacity, find out where the request is…...
Building a rate limiter, why even use Redis.
1+ day, 18+ hour ago (106+ words) Well I failed a amazon OA because of a rate limiting question, So I have built this rate limiter from... Tagged with redis, typescript, software, beginners....
Valkey 9.1 vs Redis 8.4: The Fork Finally Grew Up
1+ day, 20+ hour ago (456+ words) Back in March 2024, when Redis changed its license, the advice most teams got was simple: wait and see. Valkey, the Linux Foundation fork, was brand new. It was essentially Redis 7.4 with a different governance badge, and nobody wanted to migrate…...
Merge Sort: Sorting in O(n log n) Using Divide and Conquer
1+ day, 21+ hour ago (882+ words) Sorting is one of the most common problems in programming. You may need to sort: A simple sorting algorithm might work well for a small array, but performance becomes important when the input grows. Merge Sort can sort n elements…...
Day 16: Cosine Similarity and Semantic Search Basics
1+ day, 22+ hour ago (495+ words) Cosine similarity measures how closely two vectors point in the same direction, regardless of their length. Picture a vector as an arrow from the origin in space. Cosine similarity looks at the angle between two such arrows. If they point…...