**Architecture**: Medallion or layered: Raw (Cloud Storage) → Curved (Dataflow/Dataproc) → Curated (BigQuery). **Ingest**: Pub/Sub for streaming; Cloud Storage for batch (Scheduled transfer, gsutil). **Processing**: Dataflow (Apache Beam) for streaming and batch—unified API. Dataproc for Spark when you need MLlib or custom libs. **Orchestration**: Cloud Composer (managed Airflow). **Storage/Analytics**: BigQuery for SQL; GCS for object storage....
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