How to partition and organize data for query performance : partition strategies, sort orders, Z-ordering, and common mistakes that kill performance.
Choose the right processing model : batch, micro-batch, or streaming. Decision framework based on latency requirements, cost, and operational complexity.
How to evolve schemas safely without breaking downstream consumers : additive changes, contract enforcement, and Apache Iceberg's built-in evolution.
Build idempotent pipelines that produce the same result regardless of how many times they run : MERGE patterns, deduplication, and anti-patterns to avoid.
