Databricks Certified Data Engineer - Professional
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Discuss the role of the transaction log in maintaining the consistency of data in Delta Lake during concurrent read and write operations. Explain how the log ensures that readers always see a consistent view of the data.
Explanation:
The transaction log in Delta Lake plays a crucial role in maintaining data consistency by recording every change to the data. This allows readers to always access a consistent snapshot of the data, as the log ensures that all changes are atomic and durable. This mechanism is essential for supporting concurrent read and write operations without compromising data integrity.