DynamoDB

• Amazon NoSQL, replication across multiple AZs
• Highly scalable, millions of requests per seconds (real-time)
• Normally used for session storage
• has Tables
  • Each table has a Primary Key
    • Option 1: Partition Key (Hash)
      • Must be unique for each item and diverse
      • For example: User_ID
    • Option 2: Partition Key + Sort Key (Hash + Range)
      • The combination of these 2 must be unique for each item
      • Data is grouped by Partition key
      • For example, User_ID for partition key and Game_ID for sort key
  • Optional Sort Key
    • determine the order of how data has the same partition key is stored
  • Each table has infinite number of rows (items)
    • Each item has attributes (can be null and can be added overtime)
    • maximum size of item is 400KB
    • Supported type including:
      • Scalar Types: String, Number, Binary, Boolean, Null
      • Document Types: List, Map
      • Set Types: String Set, Number Set, Binary Set
• Has 2 modes
  • Provisioned mode (default)
  • On-demand Mode