1575 articles
Order created at 10:00. Order cancelled at 10:01. Your consumer processes them in reverse — cancellation arrives first, then creation "succeeds." The order is now in an invalid state. Event ordering bugs are subtle, expensive, and entirely avoidable.
Event sourcing for AI compliance: immutable audit trails, GDPR Article 22 compliance, replaying AI decisions, PII masking, and temporal queries for regulated industries.
Build production event-sourced systems. Learn append-only event stores, aggregate reconstruction, snapshots, projections, EventStoreDB vs Postgres, temporal queries, and schema evolution strategies.
Master read-after-write consistency, version vectors, causal consistency tokens, and UI patterns for systems where data is temporarily stale.
User updates their profile. Refreshes the page — old data shows. They update again. Still old data. They''re furious. Your system is eventually consistent — but nobody told the user (or the developer who designed the UI). Here''s how to manage consistency expectations in distributed systems.