Why Data Reconciliation Matters in AWS Glue: Finding Missing Records with Anti Joins

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A pipeline can be green and still have a data problem. This is one of the things I learned while working with data pipelines. A Glue job can complete successfully, files can be written to S3, and there may be no obvious error in the logs. But that doesn't necessarily mean that every record made it from the source to the target. That's where data reconciliation comes in.

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