Please enable JavaScript.

Coggle requires JavaScript to display documents.

AWS Dynamodb - Coggle Diagram

- - - - can be used to impl:
        Atomic Counter
    - - max size: 400KB
  - - - input: primary key
      - ProjectionExpression
    - - based on
        
        KeyConditionExpression
        
        FilterExpression
      - Limit: to limit return OR <= 1 Mb data
      - paginate
    - - entire table
      - <= 1Mb data
      - use Limit to
        limit consume RCU
      - boost: Parallel Scan ($$$)
      - ProjectionExpression & FilterExpression
  - - - can: conditional delete
  - - - 25 PutItem | DeleteItem / in call
      - <= 16Mb data, 400Kb / item
      - can't update item
      - fail write: UnprocessedItems (backoff | add WCU)
    - - <= 100 Item | <= 16Mb
      - item from 1 or more tables
      - fail write: UnprocessedKeys (backoff | add RCU)
- - - - Set
        
        Number, String, Boolean
- - - - GetItem
    - - Put|Update|Delete Item
- - - - mode
        
        strong consistent
        (ConsistentRead: True in API call)
        
        consume twice RCU
        
        eventually consist read (default)
      - 1 strong consist read | 2 eventually consistent read; 4KB size
    - - 1w / second; 1 KB size
    - - over: ProvisionedThroughputExceedException
        
        reason
        
        hot key: one part key read too many time
        
        hot partition
        
        very large item
      - over solution
        
        back off
        
        distribute part key
        
        dynamodb accelerator (DAX)