Can we change the Partition Key in Cosmos DB?

No, once a container is created in Cosmos DB, you cannot change the partition key for that container. The partition key is chosen at the time of container creation and is specified as part of the container’s configuration.

Changing the partition key would require migrating the data to a new container with a different partition key. This involves exporting the data from the existing container, creating a new container with the desired partition key, and then importing the data into the new container. This process can be complex, time-consuming, and may impact the availability of your application during the migration.

Therefore, it’s crucial to carefully choose the partition key when creating a container in Cosmos DB. Consider factors such as data distribution, query patterns, cardinality, and expected scalability to select an appropriate partition key that aligns with your application’s requirements.

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