Delta Lake is an ACID table storage layer built on cloud object storage, designed to address the challenges of using cloud storage for data lakes. It uses a transaction log to maintain data consistency and supports features like Time Travel, UPDATES, and DELETES. Concurrency is managed through optimistic concurrency control, and data mutation strategies include both copy-on-write and merge-on-read. The system is optimized for read/write performance and supports various data management features like layout optimizations and audit logging.
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