Databricks Certified Data Engineer - Associate
Get started today
Ultimate access to all questions.
Ultimate access to all questions.
To maintain the efficiency of a Delta table by removing old or obsolete files that are no longer accessible due to data retention policies, which operation should a data engineer perform?
Explanation:
The VACUUM command in Delta Lake is specifically designed to remove old data files that are no longer needed by the table for any active queries or operations. This operation is crucial for managing storage costs and improving performance by eliminating unnecessary data. Unlike OPTIMIZE, which focuses on reorganizing data files for better performance, VACUUM targets the removal of obsolete files, making it the ideal choice for this scenario.