# Dynamics 365 API Limits with Polly and Simmy

I recently presented two sessions at xRMVirtual on building resilient integrations using Polly and Simmy with Dynamics 365.

You can watch the recording of the first session here:

[https://365.training/Player/index/xrmvirtual/af60c4f2-a32e-eb11-a813-000d3a58ba85](https://365.training/Player/index/xrmvirtual/af60c4f2-a32e-eb11-a813-000d3a58ba85)

Here’s the recording for the second session:

[https://365.training/Player/Index/xrmvirtual/9c0b82f0-208b-eb11-a812-000d3a58b5ae](https://365.training/Player/Index/xrmvirtual/9c0b82f0-208b-eb11-a812-000d3a58b5ae)

I would highly recommend going through the following links to develop a better understanding of various resilience strategies and learn about design patterns and anti-patterns as well.

**Azure Transient Faults:**

[https://docs.microsoft.com/en-us/azure/architecture/best-practices/transient-faults](https://docs.microsoft.com/en-us/azure/architecture/best-practices/transient-faults)

[https://blog.jonathanoliver.com/idempotency-patterns](https://blog.jonathanoliver.com/idempotency-patterns)

[https://docs.microsoft.com/en-us/azure/architecture/patterns/throttling](https://docs.microsoft.com/en-us/azure/architecture/patterns/throttling)

[https://docs.microsoft.com/en-us/azure/architecture/patterns/retry](https://docs.microsoft.com/en-us/azure/architecture/patterns/retry)

[https://docs.microsoft.com/en-us/azure/architecture/patterns/circuit-breaker](https://docs.microsoft.com/en-us/azure/architecture/patterns/circuit-breaker)

[https://docs.microsoft.com/en-us/azure/architecture/best-practices/retry-service-specific](https://docs.microsoft.com/en-us/azure/architecture/best-practices/retry-service-specific)

**Anti-Patterns:**

[https://docs.microsoft.com/en-us/azure/architecture/antipatterns/improper-instantiation](https://docs.microsoft.com/en-us/azure/architecture/antipatterns/improper-instantiation)

**Dynamics 365 API Limits:**

[https://docs.microsoft.com/en-us/powerapps/maker/common-data-service/api-limits-overview](https://docs.microsoft.com/en-us/powerapps/maker/common-data-service/api-limits-overview)

[https://docs.microsoft.com/en-us/power-platform/admin/api-request-limits-allocations](https://docs.microsoft.com/en-us/power-platform/admin/api-request-limits-allocations)

[https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/api-limits](https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/api-limits)

**Polly:**

[http://thepollyproject.org](http://thepollyproject.org)

[https://github.com/App-vNext/Polly](https://github.com/App-vNext/Polly)

**Simmy:**

[http://thepollyproject.org/2019/06/27/simmy-the-monkey-for-making-chaos/](http://thepollyproject.org/2019/06/27/simmy-the-monkey-for-making-chaos/)

[https://github.com/Polly-Contrib/Simmy](https://github.com/Polly-Contrib/Simmy)

**Notable Tools/Frameworks:**

[https://github.com/dastergon/awesome-chaos-engineering#notable-tools](https://github.com/dastergon/awesome-chaos-engineering#notable-tools)

[https://dev.to/azure/serverless-circuit-breakers-with-durable-entities-3l2f](https://dev.to/azure/serverless-circuit-breakers-with-durable-entities-3l2f)

[https://netflixtechblog.com/making-the-netflix-api-more-resilient-a8ec62159c2d](https://netflixtechblog.com/making-the-netflix-api-more-resilient-a8ec62159c2d)

**Must Watch:**

[Mastering Chaos – A Netflix Guide to Microservices](https://www.youtube.com/watch?v=CZ3wIuvmHeM)

[System Stable: Robust connected applications with Polly, the .NET Resilience Framework – Bryan Hogan](https://www.youtube.com/watch?v=esEDPtBJz40)