16h ago · 4 min read · In this blog, you are going to understand the internals of the MongoDB aggregation pipeline. Most of us, when we first face this aggregation pipeline, get confused about why they use the $ sign inside
Join discussion
1d ago · 6 min read · How I Recovered a Broken AI-Delegated Data Pipeline in Two Days This post is less of a success story and more of a repair log. It started with a simple request: "Instead of searching by university, I want to find schools based on the department I wa...
Join discussion2d ago · 25 min read · TLDR: Cosmos DB's six API modes are wire-protocol compatibility layers over one shared ARS storage engine — except PostgreSQL (Citus), which is genuinely different. Every API emulates its native database incompletely, and those gaps are structural, n...
Join discussion2d ago · 37 min read · TLDR: NoSQL databases trade cross-entity atomicity for scale — and every database draws that atomicity boundary in a different place. MongoDB's boundary is the document (pre-4.0) or the replica set (4.0+ multi-doc transactions). DynamoDB's boundary i...
Join discussion3d ago · 6 min read · Handling large volumes of data efficiently is one of the biggest challenges in modern applications. As datasets grow into millions of records, basic queries can become slow and resource-intensive, imp
Join discussion
2d ago · 37 min read · A data engineering team at a fintech company built what they believed was a robust Change Data Capture pipeline: three source databases (PostgreSQL, MongoDB, and Cassandra), Debezium connectors wired to Kafka, and a downstream data warehouse receivin...
Join discussion6d ago · 5 min read · Adding live streaming to a platform sounds complex, but from a database design perspective it's just a few new collections. Let me show you what I came up with and why each field exists. What Live St
Join discussion
