Play free

Architecture World 2 · Right Database · Stage 4

Capacity Units

The timetable throttles on one key while the table has capacity to spare. Do the arithmetic the exam asks: units, items, partitions, indexes.

  • RCU and WCU
  • Partitions and hot keys
  • On-demand capacity
  • GSI and LSI
  • DAX
  • TTL and Streams
Domain
Core architecture
World
Architecture World 2: Right Database (Associate)
Game type
Sizing tuner: Size volumes and tables against the Tuner's meters and the bill.
Time
About 25 minutes on a first attempt (estimated)
Exam guides
  • SAA-C03Task 3.3: Determine high-performing database solutions; Task 4.3: Design cost-optimized database solutions
  • SOA-C03Skill 2.1.3: Configure and manage scaling in AWS managed databases (for example, Amazon RDS, DynamoDB)
  • DEA-C01Skill 1.1.9: Implement throttling and overcoming rate limits (for example, DynamoDB, Amazon RDS, Kinesis)
  • DVA-C02Skill 1.3.1: Describe high-cardinality partition keys for balanced partition access; Skill 1.3.2: Describe database consistency models (for example, strongly consistent, eventually consistent); Skill 1.3.3: Describe differences between query and scan operations; Skill 1.3.4: Define Amazon DynamoDB keys and indexing