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Building confidence in concurrent code with a model checker - Scott Wlaschin - NDC London 2023
Verifying the correctness of concurrent code with a model checker using TLA+, a technique to build confidence in complex systems with concurrent producers and consumers.
- Model checking is a technique to verify the correctness of concurrent code.
- The speaker uses TLA+ (Temporal Logic and Actions Plus) to model and verifying a system with concurrent producers and consumers.
- The system has two versions, V1 and V2, and a load balancer is used to manage the transitions between them.
- The speaker uses a poll question to illustrate the benefits of model checking in concurrent systems.
- The system has properties such as zero downtime and eventually true that X equals three.
- The speaker demonstrates how to use TLA+ to model the system and verify its correctness using a model checker.
- The speaker also discusses the importance of confidence in concurrent code and how model checking can help achieve that confidence.