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For a retailer DW exit (~42 TB logical, 18 nightly Glue jobs), Aurora→Redshift zero-ETL retired 11 jobs and cut dashboard freshness from 6h → ~15 min — concurrency scaling on zero-ETL (March 2026) absorbed Monday open spikes.
Virtual data modeling on AWS: Athena/Redshift semantic views without copies. July 2026 — when VDM works, when it burns Athena dollars.
Serverless RPUs vs Provisioned RA3 — still not automatic. July 2026 refresh: base 4–1024 RPUs, Max RPU-hours, AI-driven scaling, when RI wins.
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