Kafka - Advanced Stream Processing
You want to implement a windowed aggregation using a state store that keeps counts per user per 5-minute window. Which state store type should you use?
You want to implement a windowed aggregation using a state store that keeps counts per user per 5-minute window. Which state store type should you use?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify store type for windowed data
WindowStore is designed to keep data segmented by time windows.Step 2: Differentiate from other store types
KeyValueStores do not handle windowed keys natively.Final Answer:
WindowStore -> Option BQuick Check:
Windowed aggregation uses WindowStore [OK]
Quick Trick: Use WindowStore for time-windowed aggregations [OK]
Common Mistakes:
MISTAKES- Using KeyValueStore for windowed data
- Confusing timestamped store with window store
- Choosing in-memory store without window support
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