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About this paper
Roger S. Barga, Jonathan Goldstein, Mohamed Ali, Mingsheng Hong
Researchers at Microsoft Research propose CEDR, a vision for unified event stream processing that introduces a tritemporal model for event semantics and a formal framework for tunable consistency, robustly handling real-world stream imperfections like out-of-order event arrival via explicit retractions.
Key insights
- A comprehensive tritemporal model is essential for accurately capturing the nuances of event validity, modifications, and system-level processing, particularly for managing stream imperfections.
- Explicitly supporting retractions and defining tunable consistency levels provides a principled mechanism for balancing correctness, latency, and resource usage in dynamic, imperfect real-world streaming environments.
- A declarative and fully composable query language, with formal semantics for value correlations and temporal constraints, can effectively unify diverse event processing paradigms within a single system.
- Operators with 'well-behaved' semantics, even if not 'view update compliant' (like `AlterLifetime`), are fundamental building blocks for robust and predictable stream processing systems.
Summary by alphaXiv.
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