You now understand performance optimization:
- Partitioning reduces scan volume by filtering at storage level
- Clustering organizes data within partitions for faster access
- Caching avoids recomputation at query and materialized view levels
- Query optimization: filter early, select needed columns, avoid functions on filters
- Incremental processing handles only changed data
In interviews, discuss the full picture. Optimization isn't free. Explain the trade-offs between speed, cost, freshness, and complexity.