Cosmos DB multi-region and free of charge

Question

I want to do some tests with writable multi-region and still keep my account free of charge.

In Best practices to keep your account free, it says that "Account with two regions that has one container with a max of 500 RU/s provisioned throughput." don’t result in any monthly charge.

But when I go to the portal and try to add a second region to my account (which only have a single container with 400 RU/s) a warning says "When you add a region to your account, you will be billed for the additional RU/s and storage copied to the region. To keep your account completely free, stay in 1 region with 400 RU/s and 5GB of storage."

Which one of the two is the right one? Will I be charged by having an account with two regions?

Thanks!

Answer 1

Hi @Val Tortola Luis

Thanks for the Question and using Microsoft Q&A.

I understand your confusion! The key point here is that the free tier for Azure Cosmos DB supports multi-region writes, but only within the limits of the free tier's resources.

When you add a second region, you will be billed for the additional RU/s and storage beyond the free tier limits. So, if you want to keep your account completely free, you should stay within one region with 400 RU/s and 5GB of storage.

Please go through these Documentations that might help you:

https://devblogs.microsoft.com/cosmosdb/build-apps-for-free-with-azure-cosmos-db-free-tier/Hope this helps. Do let us know if you any further queries.

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