Which option should the developer use for a partition key to meet these requirements?

Explanations:

A randomly generated UUID helps distribute the data evenly across partitions, reducing the risk of hot partitions and optimizing query performance. This approach allows for balanced access patterns, which is crucial in a system with potentially variable and unpredictable customer data.

Using the customer’s full name as a partition key could lead to uneven distribution of data if many customers share the same name. This could result in hot partitions and performance issues, especially if there are many queries for a few common names.

The date when the customer signed up could lead to an unbalanced distribution of data over time, as most customers are likely to sign up within a similar timeframe. This would create hot partitions, negatively impacting performance.

The name of the customer’s pet might not provide a unique or evenly distributed partition key. If multiple customers have pets with the same name, this can lead to partition hot spots, affecting performance and scalability.