Knowledge base
Foundational reference material. Dip in when a question page mentions a term you'd like to understand from scratch.
How trees work — a novice's field guide
From binary search trees to B-trees and LSM trees. Why sorted data structures exist and where each one shines.
data-structures
trees
databases
12 min read
Secondary indexes — and why you often need a separate system
Why one database can't do every kind of query, and how two systems stay in sync through change streams.
databases
indexing
cdc
10 min read