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Which choice of keys is recommended for the DynamoDB table?

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Mikel
(@palomamikel)
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An online gaming company is planning to launch a new game with Amazon DynamoDB as its data store. The database should be designated to support the following use cases:

Update scores in real time whenever a player is playing the game. Retrieve a player’s score details for a specific game session.

A Database Specialist decides to implement a DynamoDB table. Each player has a unique user_id and each game has a unique game_id.

Which choice of keys is recommended for the DynamoDB table?

  • A . Create a global secondary index with game_id as the partition key
  • B . Create a global secondary index with user_id as the partition key
  • C . Create a composite primary key with game_id as the partition key and user_id as the sort key
  • D . Create a composite primary key with user_id as the partition key and game_id as the sort key

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Suggested Answer: D

Explanation:

https://aws.amazon.com/blogs/database/amazon-dynamodb-gaming-use-cases-and-design-patterns/

"EA uses the user ID as the partition key and primary key (a 1:1 modeling pattern)." https://aws.amazon.com/blogs/database/choosing-the-right-dynamodb-partition-key/

"Partition key and sort key: Referred to as a composite primary key, this type of key is composed of two attributes. The first attribute is the partition key, and the second attribute is the sort key."

   
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