Exam AZ-300 topic 16 question 32 discussion

Actual exam question from Microsoft's AZ-300

Question #: 32
Topic #: 16

You have an Azure Cosmos DB account named Account1. Account1 includes a database named DB1 that contains a container named Container1. The partition key for Container1 is set to /city.
You plan to change the partition key for Container1.
What should you do first?

A. Regenerate the keys for Account1.
B. Create a new container in DB1.
C. Delete Container1.
D. Implement the Azure Cosmos DB .NET SDK.

Show Suggested Answer

Suggested Answer: B 🗳️
The good news is that there are two features, the Change Feed Processor and Bulk Executor Library, in Azure Cosmos DB that can be leveraged to achieve a live migration of your data from one container to another. This allows you to re-distribute your data to match the desired new partition key scheme, and make the relevant application changes afterwards, thus achieving the effect of "updating your partition key".
Incorrect Answers:
A: It is not possible to "update" your partition key in an existing container.
Reference:
https://devblogs.microsoft.com/cosmosdb/how-to-change-your-partition-key/

by Ayexco at Aug. 30, 2020, 5:36 p.m.