CRDTs: The Hard Parts

栏目: IT技术 · 发布时间: 5年前

内容简介:A talk atConflict-free Replicated Data Types (CRDTs) are an increasingly popular family of algorithms for optimistic replication. They allow data to be concurrently updated on several replicas, even while those replicas are offline, and provide a robust wa

A talk at Hydra , online (originally planned to be in Moscow, Russia), 06 Jul 2020

Abstract

Conflict-free Replicated Data Types (CRDTs) are an increasingly popular family of algorithms for optimistic replication. They allow data to be concurrently updated on several replicas, even while those replicas are offline, and provide a robust way of merging those updates back into a consistent state. CRDTs are used in geo-replicated databases, multi-user collaboration software, distributed processing frameworks, and various other systems.

However, while the basic principles of CRDTs are now quite well known, many challenging problems are lurking below the surface. It turns out that CRDTs are easy to implement badly. Many published algorithms have anomalies that cause them to behave strangely in some situations. Simple implementations often have terrible performance, and making the performance good is challenging.

In this talk Martin goes beyond the introductory material on CRDTs, and discusses some of the hard-won lessons from years of research on making CRDTs work in practice.

References


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