Newsletter
An index is a redundant, sorted copy of a subset of your data, maintained by the database on every write. When you CREATE INDEX ON orders(customer_id), the database builds a B-tree over that column. Every insert into orders now writes twice: once to the table, once to the
Newsletter
Big O notation is a lie of omission. It tells you how an algorithm scales with input size. It says nothing about the constant factor — the multiplier in front of the n. At scale, that constant factor is dominated entirely by memory access patterns. And memory access patterns are invisible
System Design
Load Balancing Doesn’t Balance Load
System Design
Designing Retries Without Taking Down Your System
System Design
Two services that share a database are one service pretending to be two.
System Design
In a distributed system, DELETE is not a command. It's a request.
System Design
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