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Answer: Delta Lake’s OCC allows multiple transactions to proceed optimistically, detecting conflicts only during the commit phase. This approach enhances concurrency but may require transaction retries.
Delta Lake’s OCC operates on the assumption that conflicts are rare, allowing multiple transactions to proceed without immediate locking. Conflicts are detected during the commit phase, and if detected, the conflicting transaction is rolled back and retried. This approach maximizes concurrency and system performance while ensuring data integrity through the management of potential conflicts.
Author: LeetQuiz Editorial Team
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Explain how Delta Lake’s Optimistic Concurrency Control (OCC) manages the potential for conflicts when multiple transactions are modifying the same data. Discuss the implications of these conflicts on system performance and data integrity.
A
OCC in Delta Lake prevents all conflicts by locking the data, ensuring high performance but potentially limiting concurrency.
B
Delta Lake’s OCC allows multiple transactions to proceed optimistically, detecting conflicts only during the commit phase. This approach enhances concurrency but may require transaction retries.
C
OCC in Delta Lake is not used for managing conflicts; conflicts are resolved by the cloud storage layer.
D
Delta Lake does not use OCC; it relies on strict locking mechanisms that prevent all conflicts but reduce system performance.
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