Consistency Models
What Systems Actually Promise
Feb 8, 20267 min read10
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Series
Performance & State
This series covers the concepts required to understand performance of a system and how state plays a vital role in it.
Exactly-Once Delivery is Impossible
Exactly-Once Effects are not
Feb 1, 20267 min read9
Idempotency
Making Systems Correct Under Retries and Concurrency
Jan 26, 20269 min read5
Why Distributed Systems Can't Know What's Happening
Uncertainty, Timeouts, Retries and Side Effects
Jan 19, 20269 min read14
Caching: Performance vs Consistency
Every computing system, no matter how low level or high level, is constrained by the same fundamental problem: fetching data takes time. Computation itself is fast, but fetching data is slow. A modern CPU is extraordinarily fast. But what slows a sys...
Jan 12, 202610 min read6
State in a System
Explained through a simple example of a login system
Jan 5, 202610 min read26