LITHIUM: AN OSS SPLIT-BRAIN RESOLVER FOR AKKA-CLUSTER
summary
Lithium is an open source split‑brain resolver for Akka‑Cluster that implements four strategies (keep‑majority, configurable quorum, keep‑oldest, keep‑ref) and claims multi‑datacenter support. It runs an actor on every node via a DowningProvider, uses an enriched reachability reporter, timers and pessimistic joining‑to‑up assumptions to handle indirectly connected nodes and unstable views, and has ~70% test coverage with property and multi‑node tests. Deployed on production clusters for months without safety breaches.
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chapters (15)
- 0:00Introduction
- 7:20What not to do
- 9:52What to do
- 14:45Strategies
- 15:15Keep Majority
- 20:48Keeper Free
- 23:20Edge Cases
- 30:22Cluster Views
- 31:13Stability Period
- 34:03Convergence
- 36:48Architecture
- 37:55Tests
- 40:03Comparison
- 41:22Conclusion
- 42:20QA Session
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