Why it matters
Glue for serverless ETL. Understanding shapes AWS data pipelines.
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The architecture
Crawlers: discover schemas.
Catalog: unified metadata.
Jobs: Spark-based ETL.
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How it works end to end
Catalog: shared with Athena, Redshift Spectrum, EMR.
Jobs: Spark + Python shell.
Glue Studio: visual authoring.
Cost: DPU-hours.