Wunderlist: High Volume, Multi-Master, Cross-Platform, Distr. DB System

on YouTube ↗12m

" summary

Wunderlist 3 rewrites sync as a multimaster, replicating database that runs on iPhone, Android, web and desktop, using a git-like revision tree with merges and SQL atomic updates to avoid trusting client clocks. Millions of active users drive a shift from poll-heavy REST to lightweight WebSocket push backed by tiny microservices, vertical partitioned databases and a root change checker; front end uses the Play framework on Scala and the system achieves real-time shared-list updates and much reduced load.

AI-written summary · about

" chapters (8)

1. 0:00Intro
2. 4:27Problems
3. 5:21Replication
4. 6:49Revisions
5. 7:33Scale
6. 7:48Infrastructure
7. 8:26Simplicity
8. 10:43Realtime Push

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