LINKEDIN BUILT KAFKA. WHAT DID IT CHANGE WHEN KAFKA WAS NO LONGER ENOUGH?

Summary from the TLDR Data newsletter

LinkedIn outgrew Kafka's partition model at extreme scale and built Northguard to separate ordering, replication, and placement, making data movement and recovery less painful. Xinfra then hid the migration behind a compatibility layer so applications could move gradually, showing how infrastructure rewrites become practical when clients are insulated from backend changes.