Spot-Undoo: Privacy-First AI Kerala Micro-Travel Planner & Layover Explorer
This is a submission for the Hacktoberfest Open-Source AI Challenge: Week 2 - Side Hustle . 🌟 What I Built Spot-Undoo is an open-source, local-first…
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Закрыл вкладку — ушёл, обновил страницу — остался: присутствие в комнате на WebSocket
Когда человек закрыл вкладку, обновил страницу или потерял сеть, сервер получает один и тот же SessionDisconnectEvent , а реагировать должен по-разн…
Cloning a staging MongoDB and MySQL to your laptop without installing a single database client
Every week someone on my team needs a copy of our staging data on their laptop. Two databases, MongoDB and MySQL, a few gigabytes. For years the ans…
1,890,595 MongoDB Service Matches: The Default-Configuration Problem at Internet Scale
1,890,595 MongoDB Service Matches: The Default-Configuration Problem at Internet Scale MongoDB has supported authentication for many years, and its…
DocumentDB 0.109: $match $sort $limit $project covered by index scan
This should have been the first post of this series. A few months ago, I demonstrated ( video ) what I see as one of the key advantages of a documen…
DocumentDB 0.116: $sort $group prefix pushdown
DocumentDB 0.116-0, released August 20, 2026, introduced prefix sort pushdown for $group accumulators. It lets the grouping stage consume rows in th…
Multiplayer Game Development with TypeScript, Phaser, Socket.io, and MongoDB
Game data rarely looks the same for very long. A player document might start out with just a username and a score, and a few sprints later, it needs…
I ran Keploy on my MERN app. The scariest result was a green one.
Nine of my API tests were getting 401 Unauthorized instead of 200 . Keploy said the run passed. Exit code 0. That was the last thing I found. Here's…
MongoDB from One Machine to a Multi-Region Cluster
A beginner's guide to where data lives, how capacity grows, and what Atlas manages MongoDB can begin as one database process on one computer. As an…
Why Request Context Becomes Infrastructure in Multi-Tenant Node.js Applications
A multi-tenant Node.js application often starts with something that looks harmless: const tenantId = req . headers [ " x-tenant-id " ]; You resolve…
1.8 Million Reachable MongoDB Services: Reading Exposure Numbers Without Overreading Them
1.8 Million Reachable MongoDB Services: Reading Exposure Numbers Without Overreading Them A ZoomEye query for service="mongodb" returns 1,868,598 ma…
SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026
SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026 Sering kali kita terjebak dalam perdebatan klasik antara SQL dan NoSQL. Ada an…
Архитектура универсального провайдера баз данных на TypeScript без JDBC
В зрелых корпоративных экосистемах вроде Java или .NET инструменты для работы с базами данных опираются на стандартизированные на уровне среды выпол…
MongoDB Aggregation Pipelines: Stage Order Is the Win
[ EXECUTIVE TEARDOWN // TL;DR ] Put $match first and on indexed fields — every document eliminated early is one the rest of the pipeline never touch…
Generalizing Transactions in NestJS: A Domain Port over TypeORM and MongoDB
Transaction control usually starts out tied to whatever implements it. An executor — a concrete class that opens a transaction over the project's OR…
Why Your MongoDB Check in Next.js Middleware Might Be Silently Failing
I mentioned this briefly in an earlier post on middleware patterns, that direct database queries don't run reliably in middleware, and a few people…
"The write was acknowledged" means less than you think
I spent years operating databases for payment platforms, where a lost write isn't a bug, it's a regulatory conversation. That environment teaches yo…
Почему мы перестали собирать персональную ленту SQL-запросами
Как собрать персональную ленту для миллионов пользователей, когда обычный SQL-запрос с JOIN становится слишком тяжёлым? Рассказываю, как мы заранее…
Mongodb Partitioning
At Whoz , we build a SaaS platform that helps professional services companies manage their talent staffing. At the heart of our product lies a conce…
You loved my markdown previewer, so I’m giving it a major upgrade.
Building a smooth, lovely experience isn’t just about rich text rendering—it’s about ensuring the database layer under the hood is as fast, flexible…
You loved my markdown previewer, so I’m giving it a major upgrade.
Building a smooth, lovely experience isn’t just about rich text rendering—it’s about ensuring the database layer under the hood is as fast, flexible…
Как за 5 недель построить рекомендательную систему в TravelTech: Kafka и MongoDB вместо Feature Store
Привет! Меня зовут Кристина, я MLOps-инженер в Туту. Занимаюсь тем, что помогаю рекомендательным системам добраться до прода со всеми компромиссами,…
We Ditched MongoDB Atlas for AWS DocumentDB — Here's Exactly How We Did It
We Ditched MongoDB Atlas for AWS DocumentDB — Here's Exactly How We Did It One connection string change. Zero downtime. One very long night. Here's…
A backup you haven't restored isn't a backup
Migrating from MongoDB Atlas to a self-hosted replica set bought us control and cut our bill. It also quietly removed something we had stopped think…
Building a Bulletproof Comment Reply System in Node.js & MongoDB 🚀
When building a nested reply system, most developers worry about deep tree complexity or messy data structures. For Vlox , I took a different approa…
Building a Bulletproof Comment Reply System in Node.js & MongoDB 🚀
When building a nested reply system, most developers worry about deep tree complexity or messy data structures. For Vlox , I took a different approa…
Building the foundation Claudius runs on
This tutorial was written by Néstor Daza . This is the third article in a series about building Claudius , my own Claude-based chatbot ( Github ). T…
Система триггеров на событиях Change Stream в MongoDB
Почти любая распределенная платформа рано или поздно сталкивается с необходимостью синхронизировать данные между своими системами. И чем выше требов…
Getting FTDC out of MongoDB Atlas
Every MongoDB server writes FTDC, Full Time Diagnostic Data Capture, into a diagnostic.data folder next to its log. Roughly 5,700 metrics, once per…
Day 168 of Learning MERN Stack
Hello Dev Community! 👋 It is officially Day 168 of my full-stack web development journey! Today, I established the real-time websocket foundation an…