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.
Why data quality is a pipeline problem, not a dashboard problem : six dimensions of quality, validation strategies, and monitoring patterns.
