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Bronze table
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- Article · Databricks
Databricks Auto Loader, Properly Explained: The Options Nobody Bothers to Justify
In this article, you'll learn how Databricks Auto Loader actually works under the hood - not just the five-line tutorial version. It covers file discovery (directory listing vs. event-based), the five schema evolution modes and when to use each, throughput controls like maxFilesPerTrigger and maxBytesPerTrigger, file metadata and lineage, the built-in cloud_files_state() audit function, trigger strategy, and what Auto Loader's exactly-once guarantee actually promises (and doesn't
