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I am using Azure Cosmos DB for holding a variety of different document types.

I have read various documentation and am not clear on partition size.

Having many logical partitions across the data has many benefits around performance. What I don't fully understand is how to determine how many partitions to have.

Are we better to have

  • 1 million partitions of 10 records
  • 10 partitions of 1 million records

Is there some sweet spot for partition size that we should be targeting?

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