如何在 Cosmos DB 中测试多区域写入

Question

I am going to test multi-region write functionality by writing some test code using the cosmos c# v3 SDK.

I plan to have a multi-region write enabled cosmos DB (SQL core API) with three regions. I want to write to one specific region and then read from other regions. While doing it, I want to measure performance as well.
Is there any way of implementing these type of tests? Is there any good of measuring performance such as performance metrics? I also want to vary consistency level and see latency.

Answer 1

Depending on what type of tests you are looking to do the benchmarks in this Cosmos DB Global Distribution Demos GitHub Repo may be of some help. There's a bit of a learning curve as the benchmarks are data driven from app.config files. But once you get the URIs and keys in the app.config you should be mostly good to go.

One thing worth pointing out that changing consistency level when testing multiple writers and readers in different regions when configured for multi-region writes is meaningless because you will always have eventual consistency under those circumstances. For more information see, Guarantees associated with consistency levels .

The other thing to call out is you cannot configure multi-region writes with strong consistency. For more information see, Strong consistency and multiple write regions