A Cosmos container uses country as the key, and one country generates nearly all writes. Account-wide throughput has spare capacity but requests throttle. What change should be evaluated?

Choose the single best answer.

A.Only increasing global RU/s and assuming every hot key becomes unlimited
B.Adding unrelated partition-key values that never receive requests
C.Switching to archive to add Cosmos write partitions
D.A higher-cardinality access-aligned partition strategy that spreads that country's traffic, with data movement if needed

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✓ Correct answer

A higher-cardinality access-aligned partition strategy that spreads that country's traffic, with data movement if needed

A hot key can remain limited despite global spare throughput. A redesigned key distributes actual demand, usually requiring migration. Unused keys do not move hot traffic, and Blob archive does not change Cosmos partitioning. Source guide: PDF page 30-31.

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