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DUY HUYNH

Tech x Product, AI & Data Enthusiast, Tech Co-Founder

📍 Ho Chi Minh City, Vietnam http://blog.duy.dev

Build your own Redis (3/5) - Redis Replication

Following our exploration of Redis's persistence mechanisms, we now dive into one of Redis's most critical architectural features: replication. Replication enables data redundancy, read scaling, and high availability by maintaining copies of data across multiple Redis instances. Let's explore how Redis achieves this through

LLM Sandbox: One Year Journey to 100k Downloads 🎉

Hey everyone! 👋 You know that feeling when you're wrestling with a problem at 2 AM, and every existing solution feels like it was designed to make your life harder? That's exactly where I found myself a year ago. I was knee-deep in building LLM applications, desperately

Redis Data Structures: A Pythonic Interface for Distributed Data Structures

Introducing redis-data-structures - A Python library providing high-level, Redis-backed data structures with a clean, Pythonic interface.

Build your own Redis (2/5) - Redis Persistence

Following the previous post, now, we will talk about redis persistence. While primarily known as an in-memory database, Redis offers a sophisticated durability model through two complementary strategies: RDB snapshots and AOF logs. Let's dive deep into how these work, implementing our own RDB parser along the way.

Build your own Redis (1/5) - Redis Serialization Protocol and Concurrency Model

Redis represents a masterclass in systems design, particularly in how it balances performance with architectural elegance. Through implementing a Redis-compatible server via the CodeCrafters challenge, we'll deconstruct two fundamental architectural decisions that shape Redis's behavior: its wire protocol (RESP) and its event-driven concurrency model. If you&

How to Control the Creativity of LLMs Using the Temperature Parameter

When working with Large Language Models (LLMs), one of the most powerful yet often misunderstood parameters is "temperature". This setting acts as a creativity dial, allowing you to fine-tune the model's output between deterministic precision and creative exploration. Let's dive into what temperature means

How Computers Generate Random Numbers

Imagine this: you're playing your favorite video game, and an enemy drops a rare item. Or maybe you're shuffling your Spotify playlist, wondering how it picks the next song. Behind these everyday moments lies a fascinating paradox: how do computers, which are fundamentally deterministic machines, create

LeetCode - First Missing Positive

Description: https://leetcode.com/problems/first-missing-positive/description/ This problem requires finding the smallest missing positive integer in an unsorted array. The key challenge is achieving %O(N)% time and %O(1)% space complexity without using extra space for hash tables. Key insights: * Since we're looking for the first

LeetCode - Trapping Rain Water

Description: https://leetcode.com/problems/trapping-rain-water/description/ To solve this problem, the main observation is that at each index i, the amount of water that can be trapped depends on the the highest bars to its left and right elements, minus its own height. Key insights: * Water level at index_

Building a Database From Scratch: Understanding LSM Trees and Storage Engines (Part 1)

Learn core database concepts by implementing a Python key-value store with crash recovery and efficient writes. In this tutorial, we'll build a simple but functional database from scratch with Python. Through this hands-on project, we'll explore core database concepts like Write-Ahead Logging (WAL), Sorted String Tables