Pipelining & Transactions
A single Redis instance does ~100,000 operations per second (Lesson 1) — but…
Tag
#transactions
7 posts
Delivery Semantics
“Does Kafka deliver each message exactly once?” is the question everyone asks…
Database Internals for Backend Engineers — PostgreSQL in Depth
Most backend engineers use a database every single day, and treat it like a…
Transactions and Isolation Levels — Lost Updates and Write Skew
Here’s a bug I’ve seen in some form at almost every company with a wallet…
MVCC Explained — How Postgres Handles Many Users at Once
When I explain MVCC to new engineers, I start with a question: “When you a row…
Design a Payment System
Payment systems are the backbone of e-commerce. A bug here does not just cause a…
Design an E-Commerce Platform
E-commerce platforms handle some of the most demanding distributed systems…