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Describe how Delta Lake’s Optimistic Concurrency Control (OCC) mechanism works and identify which types of transactions are likely to conflict. Discuss the implications of these conflicts on data consistency and the strategies Delta Lake employs to manage them.
Describe how Delta Lake’s Optimistic Concurrency Control (OCC) mechanism works and identify which types of transactions are likely to conflict. Discuss the implications of these conflicts on data consistency and the strategies Delta Lake employs to manage them.
Simulated
A
OCC in Delta Lake allows all transactions to proceed without any checks, leading to frequent conflicts and data inconsistencies.
3.5%
B
Delta Lake’s OCC assumes that conflicts are rare and allows transactions to proceed optimistically. Conflicts occur when multiple transactions try to modify the same data simultaneously, leading to a need for rollback and retry.
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